Tag: 300-400

A novel composite based on pyrene thiazole grafted on graphene oxide:physico-chemical characterization and electrochemical investigations was written by Tudose, Madalina;Baratoiu-Carpen, Rodica D.;Anghel, Elena Maria;Voicescu, Mariana;Somacescu, Simona;Culita, Daniela C.;Hanganu, Anamaria;Kuncser, Andrei;Radoi, Antonio. And the article was included in Materials Chemistry and Physics in 2021.COA of Formula: C18H11BrO The following contents are mentioned in the article:

The authors report the obtaining of a new composite starting from pyrene thiazole, a compound certified by NMR and its covalent grafting on the surface of graphene oxide. Novel material was synthesized in two stages: the 1st involving transformation of carboxyl groups of graphene oxide into acid chlorides and the 2nd the amide reaction between acid chloride and amine group of pyrene thiazole (PTC). Numerous characterization methods were used to certify this material, such as: Raman spectroscopy, fluorescence, IR spectroscopy and XPS, SEM and TEM. Their results show the successful covalent functionalization of graphene oxide with pyrene thiazole through the formation of amide bonds. The electrochem. study consisted of evaluating the redox behavior of the C screen printed electrodes modified with the new composite (GO-PTC) using caffeic acid, as analyte. From anal. point of view, it is relevant to be able to quantify the presence of caffeic acid and for such reason the authors used as anal. method the square wave voltammetry. The GO-PTC modified C screen printed electrodes were able to detect the caffeic acid over more than one order of magnitude (linear working range: 0.005-0.1 mM) and GO-PTC modified electrodes can be considered promising for other anal. studies. This study involved multiple reactions and reactants, such as 2-Bromo-1-(pyren-1-yl)ethanone (cas: 80480-15-5COA of Formula: C18H11BrO).

2-Bromo-1-(pyren-1-yl)ethanone (cas: 80480-15-5) belongs to organobromine compounds. Most organobromine compounds, like most organohalide compounds, are relatively nonpolar. The reactivity of organobromine compounds resembles but is intermediate between the reactivity of organochlorine and organoiodine compounds. For many applications, organobromides represent a compromise of reactivity and cost.COA of Formula: C18H11BrO

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

1-(Bromoacetyl)pyrene and its arsonium salt as novel photoinitiators for styrene polymerization was written by Mishra, Anuradha;Daswal, Swati. And the article was included in Journal of Applied Polymer Science in 2006.Category: bromides-buliding-blocks The following contents are mentioned in the article:

The photopolymerization of styrene (Sty) in DMSO induced by pyrene (Py), 1-acetylpyrene (AP), 1-(bromoacetyl) pyrene (BP), and 1-acetylpyrene tri-Ph arsonium bromide (APAS) was studied. Under all conditions used, Py was completely ineffective. Incorporation of a chromophoric (COMe) moiety introduces photoinitiating activity into Py. Introduction of Br into AP markedly accelerated the rate of UV irradiation-induced polymerization BP was further modified to its arsonium salt (APAS). The kinetics and mechanism of polymerization using BP and APAS as initiators were investigated in detail. The polymerization with BP followed nonideal kinetics (R_p ∞ [BP]^0.8 [Sty]^1.1) with respect to initiator concentration whereas ideal kinetics (R_p ∞ [APAS]^0.48 [Sty]^1.1) was observed when APAS was used as initiator. Degradative transfer is thought to be mainly responsible for this unusual kinetic behavior for the BP-Sty system. The kinetic data proved that BP was a more effective and faster initiator than APAS. In both the cases, the mechanism of polymerization was free radical as evident by the inhibiting effect of hydroquinone and ESR studies. IR and NMR spectra showed the atactic nature of the polystyrene. This study involved multiple reactions and reactants, such as 2-Bromo-1-(pyren-1-yl)ethanone (cas: 80480-15-5Category: bromides-buliding-blocks).

2-Bromo-1-(pyren-1-yl)ethanone (cas: 80480-15-5) belongs to organobromine compounds. Many of the organo bromine compounds are relatively nonpolar. Bromine is more electronegative than carbon (2.8 vs 2.5) and hence the carbon in a carbon–bromine bond is electrophilic in nature. Many of the alkyl bromine derivatives are excellent alkylating agents since bromides are good leaving groups. Tribromides, like tetrabutylammonium tribromide, are used as a solid source of bromine. N-bromosuccimide (NBS) is used for the selective bromination of allylic bonds.Category: bromides-buliding-blocks

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Anode Preparation Strategies for the Electrocatalytic Oxidation of Water Based on Strong Interactions between Multiwalled Carbon Nanotubes and Cationic Acetylammonium Pyrene Moieties in Aqueous Solutions was written by Koelewijn, Jacobus M.;Lutz, Martin;Detz, Remko J.;Reek, Joost N. H.. And the article was included in ChemPlusChem in 2016.Computed Properties of C18H11BrO The following contents are mentioned in the article:

A strategy is reported for the immobilization of iridium-based water oxidation catalyst 3 onto fluorine-doped tin oxide (FTO) anodes evaluated for the electrocatalytic oxidation of H₂O. The strategy is based on noncovalent π-π interactions between multiwalled carbon nanotubes (MWCNTs) and the cationic acetylammonium pyrene moiety (Pyr⁺) covalently attached to a NHC IrCp*Cl₂ catalytically active center (NHC=N-heterocyclic carbene, Cp*=C₅Me₅). The dispersive properties of the Pyr⁺ moiety in compound 3 leads to the formation of stable MWCNT dispersions in aqueous solutions In addition, the MWCNT/3 assembly shows activity in the Ce⁴⁺-driven oxidation of H₂O. FTO/MWCNT/3 anodes show increased current densities when used as a working electrode for the electrocatalytic oxidation of H₂O. At higher anodic polarizations initially high current densities were achieved; however, these currents prove to be non-sustained due to delamination and degradation of the catalytically active surface. The immobilization strategy is limited to applications below 1.4 V vs normal hydrogen electrode (NHE) as oxidation of the pyrene backbone is evident at higher potentials. This study involved multiple reactions and reactants, such as 2-Bromo-1-(pyren-1-yl)ethanone (cas: 80480-15-5Computed Properties of C18H11BrO).

2-Bromo-1-(pyren-1-yl)ethanone (cas: 80480-15-5) belongs to organobromine compounds. Many of the organo bromine compounds are relatively nonpolar. Bromine is more electronegative than carbon (2.8 vs 2.5) and hence the carbon in a carbon–bromine bond is electrophilic in nature. One prominent application of synthetic organobromine compounds is the use of polybrominated diphenyl ethers as fire-retardants, and in fact fire-retardant manufacture is currently the major industrial use of the element bromine.Computed Properties of C18H11BrO

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Synthesis and Characterization of Novel Gold(III) Complexes of Asymmetrically Aryl-Substituted 1,2-Dithiolene Ligands Featuring Potential-Controlled Spectroscopic Properties was written by Ambrosio, Lucia;Aragoni, M. Carla;Arca, Massimiliano;Devillanova, Francesco A.;Hursthouse, Michael B.;Huth, Susanne L.;Isaia, Francesco;Lippolis, Vito;Mancini, Annalisa;Pintus, Anna. And the article was included in Chemistry – An Asian Journal in 2010.Synthetic Route of C18H11BrO The following contents are mentioned in the article:

The tetrabutylammonium (TBA⁺) salts of square-planar monoanionic gold complexes of the unsym. substituted Ar,H-edt^2- 1,2-dithiolene ligands (Ar,H-edt^2- = arylethylene-1,2-dithiolato; Ar = Ph (1^–), 2-naphthyl (2^–), and 1-pyrenyl (3^–)) were synthesized and characterized by spectroscopic and electrochem. methods and the corresponding neutral species (1, 2, and 3, resp.) were obtained in CH₂Cl₂ solution at room temperature by diiodine oxidation The single-crystal X-ray diffraction structural data collected for (TBA⁺)(2^–), supported by DFT theor. calculations, are consistent with the ene-1,2-dithiolate form of the ligand and the Au^III oxidation state. All complexes feature intense near-IR absorptions (at about 1.5 μm) in their neutral states and vis-emitting properties in the 400-550 nm range, the energy of which is controlled by the charge of the complex in the case of the 3^–/3 couple. The spectroscopic and electrochem. features of 1^x- and 2^x- (x = 0, 1), both in their cis and trans conformations, were investigated by means of DFT and time-dependent (TD) DFT calculations This study involved multiple reactions and reactants, such as 2-Bromo-1-(pyren-1-yl)ethanone (cas: 80480-15-5Synthetic Route of C18H11BrO).

2-Bromo-1-(pyren-1-yl)ethanone (cas: 80480-15-5) belongs to organobromine compounds. Many of the organo bromine compounds are relatively nonpolar. Bromine is more electronegative than carbon (2.8 vs 2.5) and hence the carbon in a carbon–bromine bond is electrophilic in nature. When the molecular ion is detected, the bromine and chlorine isotope patterns are very distinct, but caution is to be exercised for certain mixed chlorinated/brominated compounds, which can look similar to homohalogen patterns.Synthetic Route of C18H11BrO

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Improved analytical methodology for the derivatization and HPLC-fluorometric determination of okadaic acid in phytoplankton and shellfish was written by Dickey, Robert W.;Granade, H. Ray;Bencsath, F. Aladar. And the article was included in Developments in Marine Biology in 1993.COA of Formula: C18H11BrO The following contents are mentioned in the article:

A method for the derivatization and liq chromatog. detn of the marine toxin okadaic acid (OA) was developed. OA was extracted from cultured dinoflagellates and from homogenized shellfish with aqueous 80% MeOH and partitioned into chloroform from water. OA in the extract was derivatized in acetonitrile with 1-bromoacetylpyrene. The product, pyrenacyl okadaate, was then separated from excess reagent and reaction byproducts by solid-phase extraction Analyses were carried out in acetonitrile solution on a C₁₈ reversed-phase column using aqueous 75% acetonitrile as mobile phase with fluorometric detection at 365 nm excitation and 418 nm emission. Deoxycholic acid (DOCA) derivatized and extracted by the same procedure was employed as internal standard Peak height coefficients of variation for 12 randomized injections of 3 OA standard concentrations (5, 10, and 50 ng) with fixed DOCA concentrations (40 ng) ranged from 1.72% to 8.65% for OA and 1.82% to 9.23% for DOCA. The relative retention time OA/DOCA was 0.598 (n =13). Standard OA recoveries from shellfish at spike levels of 1.0 ug/g or larger were >95%. The method was linear between 1.0 and 80 ng OA injected and the lower limit of detection was 0.1 ng. This study involved multiple reactions and reactants, such as 2-Bromo-1-(pyren-1-yl)ethanone (cas: 80480-15-5COA of Formula: C18H11BrO).

2-Bromo-1-(pyren-1-yl)ethanone (cas: 80480-15-5) belongs to organobromine compounds. Bromine is more electronegative than carbon (2.9 vs 2.5). Consequently, the carbon in a carbon–bromine bond is electrophilic, i.e. alkyl bromides are alkylating agents. Commercially available organobromine pharmaceuticals include the vasodilator nicergoline, the sedative brotizolam, the anticancer agent pipobroman, and the antiseptic merbromin. COA of Formula: C18H11BrO

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Stable, Glassy, and Versatile Binaphthalene Derivatives Capable of Efficient Hole Transport, Hosting, and Deep-Blue Light Emission was written by Wei, Bin;Liu, Ji-Zhong;Zhang, Yong;Zhang, Jian-Hua;Peng, Hua-Nan;Fan, He-Liang;He, Yan-Bo;Gao, Xi-Cun. And the article was included in Advanced Functional Materials in 2010.Formula: C18H11BrFN The following contents are mentioned in the article:

Organic light-emitting diodes (OLEDs) have great potential applications in display and solid-state lighting. Stability, cost, and blue emission are key issues governing the future of OLEDs. The synthesis and photoelectronics of 3 kinds of binaphthyl (BN) derivatives are reported. BN_1-3 are melting-point-less and highly stable materials, forming very good, amorphous, glass-like films. They decompose at temperatures ≤485-545°. At a constant c.d. of 25 mA cm^-2, an ITO/BN₃/Al single-layer device has a much-longer lifetime (>80 h) than that of an ITO/NPB/Al single-layer device (8 h). Also, the lifetime of a multilayer device based on BN₁ is longer than a similar device based on NPB. BNs are efficient and versatile OLED materials: they can be used as a hole-transport layer (HTL), a host, and a deep-blue-light-emitting material. This versatility may cut the cost of large-scale material manufacture More importantly, the deep-blue electroluminescence (emission peak at 444 nm with CIE coordinates (0.16, 0.11), 3.23 cd A^-1 at 0.21 mA cm^-2, and 25200 cd m^-2 at 9 V) remains very stable at very high current densities up to 1000 mA cm^-2. This study involved multiple reactions and reactants, such as 3-Bromo-9-(4-fluorophenyl)-9H-carbazole (cas: 922721-30-0Formula: C18H11BrFN).

3-Bromo-9-(4-fluorophenyl)-9H-carbazole (cas: 922721-30-0) belongs to organobromine compounds. Bromo compounds are employed in a variety of metal-catalyzed coupling reactions. They are also ideal candidates for the synthesis of Grignard reagents that have wide-applicability in organic synthesis. When the molecular ion is detected, the bromine and chlorine isotope patterns are very distinct, but caution is to be exercised for certain mixed chlorinated/brominated compounds, which can look similar to homohalogen patterns.Formula: C18H11BrFN

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Structure-activity relationships for abiotic thiol reactivity and aquatic toxicity of halo-substituted carbonyl compounds was written by Schultz, T. W.;Ralston, K. E.;Roberts, D. W.;Veith, G. D.;Aptula, A. O.. And the article was included in SAR and QSAR in Environmental Research in 2007.Synthetic Route of C18H11BrO The following contents are mentioned in the article:

Using abiotic thiol reactivity (EC₅₀) and Tetrahymena pyriformis toxicity (IGC₅₀) data for a group of halo-substituted ketones, esters and amides (i.e. S_N2 electrophiles) and related compounds a series of structure-activity relationships are illustrated. Only the α-halo-carbonyl-containing compounds are observed to be thiol reactive with the order I > Br > Cl > F. Further comparisons disclose α-halo-carbonyl compounds to be more reactive than non-α-halo-carbonyl compounds; in addition, the reactivity is reduced when the number of C atoms between the carbonyl and halogen is greater than one. Comparing reactivity among α-halo-carbonyl-containing compounds with different β-alkyl groups shows the greater the size of the β-alkyl group the lesser the reactivity. A comparison of reactivity data for 2-bromoacetyl-containing compounds of differing dimensions reveals little difference in reactivity. Regression anal. demonstrates a linear relationship between toxicity and thiol reactivity: log(IGC^-1₅₀) = 0.848 log(EC^-1₅₀) + 1.40; n = 19, s = 0.250, r² = 0.926, r²(pred) = 0.905, F = 199, Pr > F = 0.0001. This study involved multiple reactions and reactants, such as 2-Bromo-1-(pyren-1-yl)ethanone (cas: 80480-15-5Synthetic Route of C18H11BrO).

2-Bromo-1-(pyren-1-yl)ethanone (cas: 80480-15-5) belongs to organobromine compounds. Bromo compounds are employed in a variety of metal-catalyzed coupling reactions. They are also ideal candidates for the synthesis of Grignard reagents that have wide-applicability in organic synthesis. alpha-Bromoesters are employed in the Reformatsky reaction for the synthesis of beta-hydroxyesters. The principal reactions for organobromides include dehydrobromination, Grignard reactions, reductive coupling, and nucleophilic substitution.Synthetic Route of C18H11BrO

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Further studies on the dialkylation chemistry of [Pt₂(μ-S)₂(PPh₃)₄] with activated alkyl halides RC(O)CH₂X (X = Cl, Br) was written by Ujam, Oguejiofo T.;Henderson, William;Nicholson, Brian K.;Andy Hor, T. S.. And the article was included in Inorganica Chimica Acta in 2011.Reference of 80480-15-5 The following contents are mentioned in the article:

Further studies have been carried out into the reactivity of [Pt₂(μ-S)₂(PPh₃)₄] towards a range of activated alkylating agents of the type RC(O)CH₂X (R = organic moiety, e.g. Ph, pyrenyl; X = Cl, Br). Alkylation of both sulfide centers is observed for PhC(O)CH₂Br, 3-(bromoacetyl)coumarin [CouC(O)CH₂Br], and 1-(bromoacetyl)pyrene [PyrC(O)CH₂Br], giving dications [Pt₂{μ-SCH₂C(O)R}₂(PPh₃)₄]²⁺, isolated as their PF₆^– salts. The x-ray structure of [Pt₂{μ-SCH₂C(O)Ph}₂(PPh₃)₄](PF₆)₂ shows the presence of short Pt···O contacts. In contrast, the corresponding chloro compounds [typified by PhC(O)CH₂Cl] and imino analogs [e.g. PhC(NOH)CH₂Br] do not dialkylate [Pt₂(μ-S)₂(PPh₃)₄]. The ability of PhC(O)CH₂Br to dialkylate [Pt₂(μ-S)₂(PPh₃)₄] allows the synthesis of new mixed-alkyl dithiolate derivatives of the type [Pt₂{μ-SCH₂C(O)Ph}(μ-SR)(PPh₃)₄]²⁺ (R = Et or n-Bu), through alkylation of in situ-generated monoalkylated compounds [Pt₂(μ-S)(μ-SR)(PPh₃)₄]⁺ (from [Pt₂(μ-S)₂(PPh₃)₄] and excess RBr). In these heterodialkylated systems ligand replacement of PPh₃ occurs by the bromide ions in the reaction mixture forming monocations [Pt₂{μ-SCH₂C(O)Ph}(μ-SR)(PPh₃)₃Br]⁺. This ligand substitution can be easily suppressed by addition of PPh₃ to the reaction mixture The complex [Pt₂{μ-SCH₂C(O)Ph}(μ-SBu)(PPh₃)₄]²⁺ was crystallog. characterized. X-ray crystal structures of the bromide-containing complexes [Pt₂{μ-SCH₂C(O)Ph}(μ-SR)(PPh₃)₃Br]⁺ (R = Et, Bu) are also reported. In both structures the coordinated bromide is trans to the SCH₂C(O)Ph ligand, which adopts an axial position, while the Et and Bu substituents adopt equatorial positions, in contrast to the structures of the dialkylated complexes [Pt₂{μ-SCH₂C(O)Ph}₂(PPh₃)₄]²⁺ and [Pt₂{μ-SCH₂C(O)Ph}(μ-SBu)(PPh₃)₄]²⁺ (and many other known analogs) where both alkyl groups adopt axial positions. This study involved multiple reactions and reactants, such as 2-Bromo-1-(pyren-1-yl)ethanone (cas: 80480-15-5Reference of 80480-15-5).

2-Bromo-1-(pyren-1-yl)ethanone (cas: 80480-15-5) belongs to organobromine compounds. Bromo compounds are employed in a variety of metal-catalyzed coupling reactions. They are also ideal candidates for the synthesis of Grignard reagents that have wide-applicability in organic synthesis. alpha-Bromoesters are employed in the Reformatsky reaction for the synthesis of beta-hydroxyesters. The principal reactions for organobromides include dehydrobromination, Grignard reactions, reductive coupling, and nucleophilic substitution.Reference of 80480-15-5

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Experimental Reactivity Parameters for Toxicity Modeling: Application to the Acute Aquatic Toxicity of S_N2 Electrophiles to Tetrahymena pyriformis was written by Roberts, David W.;Schultz, T. Wayne;Wolf, Erika M.;Aptula, Aynur O.. And the article was included in Chemical Research in Toxicology in 2010.Synthetic Route of C18H11BrO The following contents are mentioned in the article:

A diverse set of 60 haloaliph. compounds were evaluated for reactivity with cysteine thiol groups in the previously described RC₅₀ assay using glutathione (GSH) as a model nucleophile. Reactivity was quantified by the RC₅₀ value, the concentration of test compound that produced 50% reaction of the GSH thiol groups in 120 min. Under standard conditions, RC₅₀ values are math. proportional to reciprocal rate constants Quant. structure-activity relationship (QSAR) anal. correlating acute aquatic toxicity (IGC₅₀) to Tetrahymena pyriformis with RC₅₀ values was carried out. It was found that subdivision of the compounds into subdomains according to their reaction mechanism characteristics enabled toxicity-reactivity relationships to be identified. The largest subdomain consisting of 22 compounds in which a primary halogen is α to a carbonyl or other electroneg. unsaturated group and which can be confidently assigned as S_N2 electrophiles fits the equation pIGC₅₀ (mM) = 0.94 (±0.07) pRC₅₀ (mM) + 1.34 (±0.07), n = 22, r² = 0.889, r²(adj) = 0.884, s = 0.27, and F = 161. Compounds in which the halogen is not α to an unsaturated group are not reactive in the GSH assay and do not exhibit reactive toxicity to T. pyriformis. Compounds tested in which the halogen is α to an unsaturated nonelectroneg. group were found to be less toxic in the assay than predicted by the above QSAR equation. Within a subdomain of 21 compounds having a halogen α to an electroneg. unsaturated group that, in the absence of exptl. evidence, could not be confidently assigned as S_N2 electrophiles, 2-bromoalkanoates of general structure R¹CHBrCO₂R², 2-bromopropionamide, and 2-haloalkanoic acids of general formula R¹CHXCO₂H (nine compounds in total) are all well-predicted by the above equation. Of the other 12 compounds of this subdomain, eight are substantially less toxic than predicted by the above equation and are considered to react differently, whereas the α-halonitriles (four compounds) are more toxic than predicted and fit a correlation of their own: pIGC₅₀ = 1.01 (±0.05) pRC₅₀ + 2.04 (±0.05), n = 4, r² = 0.995, r²(adj) = 0.992, s = 0.08, and F = 381, with a similar slope but larger intercept. An explanation in terms of their phys. chem. and possible involvement of released cyanide ion is suggested. This study involved multiple reactions and reactants, such as 2-Bromo-1-(pyren-1-yl)ethanone (cas: 80480-15-5Synthetic Route of C18H11BrO).

2-Bromo-1-(pyren-1-yl)ethanone (cas: 80480-15-5) belongs to organobromine compounds. Organo bromine compounds are versatile compounds and are widely used in diverse fields. Organo bromine derivatives are used in the dye sector, as an indicator in analytical chemistry (Bromothymol blue is a popular indicator). When the molecular ion is detected, the bromine and chlorine isotope patterns are very distinct, but caution is to be exercised for certain mixed chlorinated/brominated compounds, which can look similar to homohalogen patterns.Synthetic Route of C18H11BrO

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Direct Conversion of α-Substituted Ketones to Metallo-1,2-enedithiolates was written by Hsu, John K.;Bonangolino, Cecilia J.;Kaiwar, Sharada P.;Boggs, Christine M.;Fettinger, James C.;Pilato, Robert S.. And the article was included in Inorganic Chemistry in 1996.Application of 80480-15-5 The following contents are mentioned in the article:

A new synthetic route to metallo-1,2-enedithiolates is presented. The addition of 1 equiv of the α-bromo ketones ArC(O)CHXR (X = Br) {Ar = 2-quinoxalinyl, 2-, 3-, or 4-pyridinyl, Ph, Cl-Ph, and 1-pyrenyl (R = H); Ar = 2-quinoxalinyl (R = Me); and Ar = R = Ph} to Cp₂Mo(SH)₂ followed by the addition of base results in the formation of the corresponding metallo-1,2-enedithiolate Cp₂Mo{η²-SC(Ar)C(R)S}. The α-tosyl ketones quinoxalinyl-C(O)CHR-O-tosyl {R = H, Me} and the α-phosphorylated ketone 3-pyridinyl-C(O)CH₂-O-P(O)(OEt)₂ yield the same products as the corresponding α-bromo ketones upon reaction with Cp₂Mo(SH)₂. The addition of acid to the heterocyclic substituted complexes yields Cp₂Mo{η²-SC(HetH⁺)C(R)S}. Both Cp₂Mo{η²-SC(2-quinoxalinyl)C(H)S}and [Cp₂Mo{η²-SC(2-quinoxaliniumyl)C(H)S}][BF₄] have been crystallog. characterized. Cp₂Mo{η²-SC(2-quinoxalinyl)C(H)S} crystallizes in the C2/c space group with a = 21.451(2) Å, b = 15.474 Å, c = 12.2201(13) Å, and β = 107.440(7)°. [Cp₂Mo{η²-SC(2-quinoxalinium)C(H)S}][BF₄] crystallizes in the P1̅ space group with a = 7.4009(8) Å, b = 10.1192(13)° Å, c = 15.930(4) Å; α = 81.49(2)°, β = 76.14(2)°, and γ = 85.784°. In the solid state [Cp₂Mo{η²-SC(2-quinoxaliniumyl)C(H)S}][BF₄] π-stacks the heterocycle of two adjacent mols. with atom-atom distances of ≈ 3.6 Å. The stacks are limited to pairs of mols., and there is no long-range order. The pK_a values for the quinoxalinium (R = H and Me) and the 2-, 3-, and 4-pyridinium (R = H) complexes have been determined in acetonitrile to be 1-3 units larger than the free heterocycles. The pK_a of the pyridinium complexes follows the substitution trend 2 ≈ 4 > 3 > free pyridinium and is consistent with resonance stabilization of pyridinium by the metallo-1,2-enedithiolate. Electronic transitions in these complexes have been assigned to a LMCT transition and an ILCT transition by comparison of the various complexes accompanied with solvent sensitivity studies. This study involved multiple reactions and reactants, such as 2-Bromo-1-(pyren-1-yl)ethanone (cas: 80480-15-5Application of 80480-15-5).

2-Bromo-1-(pyren-1-yl)ethanone (cas: 80480-15-5) belongs to organobromine compounds. Organo bromine compounds are versatile compounds and are widely used in diverse fields. Organo bromine derivatives are used in the dye sector, as an indicator in analytical chemistry (Bromothymol blue is a popular indicator). The reactivity of organobromine compounds resembles but is intermediate between the reactivity of organochlorine and organoiodine compounds. For many applications, organobromides represent a compromise of reactivity and cost.Application of 80480-15-5

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary