Author: Jessica.F

Yasuhara, Akio published the artcileTemperature-programmed retention indexes of 221 halogenated organic compounds with 1-bromoalkanes as references, Computed Properties of 594-81-0, the publication is Journal of Chromatography (1985), 35-48, database is CAplus.

Retention indexes (I‘) of 221 halogenated aliphatic and alicyclic compounds were measured on the 1-bromoalkane scale by temperature-programmed gas chromatog. using a fused-silica capillary column coated with Me silicone. An LFER was observed between the retention indexes of the solutes and their b.p. There is an LFER between b.p. and C atom number in a homologous series. Consequently, there is also an LFER between I‘ and b.p. and mol. refraction. Regularities were observed between I‘ and the mol. structure.

Journal of Chromatography published new progress about 594-81-0. 594-81-0 belongs to bromides-buliding-blocks, auxiliary class Bromide,Aliphatic hydrocarbon chain, name is 2,3-Dibromo-2,3-dimethylbutane, and the molecular formula is C38H24F4O4P2, Computed Properties of 594-81-0.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Mizushima, Sanichiro published the artcileNature of the potential hindering internal rotation, Name: 2,3-Dibromo-2,3-dimethylbutane, the publication is Nippon Kagaku Kaishi (1921-47) (1952), 621-3, database is CAplus.

The exptl. results on the infrared absorption, Raman effect, dipole moment, electron diffraction, etc., of ethylene chloride and related compounds are reviewed and the nature of the hindering potential is discussed. The mol. configuration of rotational isomers of XH₂CCH₂Y-type mols. is independent of the elec. properties of X and Y. Hence the most important factor affecting the hindering potential is something other than electrostatic force. Steric repulsion due to exchange integral between atoms not directly bound together is supposed to be the most important. The internal rotation in Cl₃SiSiCl₃ is almost free, whereas the hindering barrier in Cl₃CCCl₃ amounts to 10-15 kcal./mole. This fact suggests that the force hindering internal rotation is very sensitive to at. distance. This also favors the view that steric repulsion rather than electrostatic force plays the major role. Since Br and CH₃ have nearly the same van der Waals radii, the energy difference between trans and gauche forms of Br(CH₃)₂CC(CH₃)₂Br indicate that electrostatic contribution must not be neglected. Hydrogen-bond formation is important in ClH₂CCH₂OH, since in this mol. the trans form is less stable than the gauche form. The case of ClOCCOCl with trans configuration as the most stable position reveals importance of resonance giving to the CC bond some double-bond character. Intermol. forces in liquid and solid can affect the equilibrium of rotational isomers but not the mol. configurations determined mainly by steric effect.

Nippon Kagaku Kaishi (1921-47) published new progress about 594-81-0. 594-81-0 belongs to bromides-buliding-blocks, auxiliary class Bromide,Aliphatic hydrocarbon chain, name is 2,3-Dibromo-2,3-dimethylbutane, and the molecular formula is C6H12Br2, Name: 2,3-Dibromo-2,3-dimethylbutane.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Kajigaeshi, Shoji published the artcileOxidation using quaternary ammonium polyhalides. IX. Oxidation of hindered phenols with benzyltrimethylammonium tribromide, Category: bromides-buliding-blocks, the publication is Bulletin of the Chemical Society of Japan (1991), 64(3), 1060-2, database is CAplus.

Oxidation of hindered phenols, such as 2,6-di-tert-butyl-4-methylphenol, 3,5-di-tert-butyl-4-hydroxybenzyl alc., and 2,6-di-tert-butylphenol, with benzyltrimethylammonium tribromide were carried out in CH₂Cl₂ in the presence of water, tert-Bu alc., or aqueous NaOH at room temperature Sequential reaction processes were provided by the obtained products.

Bulletin of the Chemical Society of Japan published new progress about 111865-47-5. 111865-47-5 belongs to bromides-buliding-blocks, auxiliary class Benzenes, name is Mono(N,N,N-trimethyl-1-phenylmethanaminium) tribromide, and the molecular formula is C10H16Br3N, Category: bromides-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Kajigaeshi, Shoji published the artcileOxidation using quaternary ammonium polyhalides. VIII. Oxidation of 1,4-benzenediols with benzyltrimethylammonium tribromide, Name: Mono(N,N,N-trimethyl-1-phenylmethanaminium) tribromide, the publication is Bulletin of the Chemical Society of Japan (1991), 64(1), 336-8, database is CAplus.

The reaction of 1,4-benzenediols with 1.1 equivalent of benzyltrimethylammonium tribromide in dichloromethane in the presence of aqueous sodium acetate at room temperature gave 2,5-cyclohexadiene-1,4-diones in good yields. On the other hand, the reaction of 1,4-benzenediols with a large excess of the reagent in aqueous acetic acid at 40-60° gave polybromo-substituted 2,5-cyclohexadiene-1,4-diones in good yields.

Bulletin of the Chemical Society of Japan published new progress about 111865-47-5. 111865-47-5 belongs to bromides-buliding-blocks, auxiliary class Benzenes, name is Mono(N,N,N-trimethyl-1-phenylmethanaminium) tribromide, and the molecular formula is C10H16Br3N, Name: Mono(N,N,N-trimethyl-1-phenylmethanaminium) tribromide.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Porres, Laurent published the artcileEnhanced two-photon absorption with novel octupolar propeller-shaped fluorophores derived from triphenylamine, HPLC of Formula: 21101-63-3, the publication is Organic Letters (2004), 6(1), 47-50, database is CAplus and MEDLINE.

Novel octupolar fluorophores derived from the sym. functionalization of a triphenylamine core with strong acceptor peripheral groups via phenylene-ethynylene linkers have been synthesized and shown to exhibit high fluorescence quantum yields, very large two-photon-absorption cross-sections in the red-NIR region, and suitable photostability.

Organic Letters published new progress about 21101-63-3. 21101-63-3 belongs to bromides-buliding-blocks, auxiliary class Trifluoromethyl,Fluoride,Bromide,sulfides,Benzyl bromide,Benzene, name is (4-(Bromomethyl)phenyl)(trifluoromethyl)sulfane, and the molecular formula is C8H6BrF3S, HPLC of Formula: 21101-63-3.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Caputo, Romualdo published the artcileSelective debromination of substituted vic-dibromides, Computed Properties of 594-81-0, the publication is Rendiconto dell’Accademia delle Scienze Fisiche e Matematiche, Naples (1983), 50(2), 299-300, database is CAplus.

Vicinal dibromides possessing at least 1 bromine atom bonded to a tertiary carbon were debrominated by heating in DMF at 60°. Thus, heating 2β,3α-dibromo-3β-methyl-5α-cholestane in DMF 1 h gave 90% 3-methyl-5α-cholest-2-ene; heating Me₂CBrCBrMe₂ in DMF 9 h gave 80% Me₂C:CMe₂.

Rendiconto dell’Accademia delle Scienze Fisiche e Matematiche, Naples published new progress about 594-81-0. 594-81-0 belongs to bromides-buliding-blocks, auxiliary class Bromide,Aliphatic hydrocarbon chain, name is 2,3-Dibromo-2,3-dimethylbutane, and the molecular formula is C6H12Br2, Computed Properties of 594-81-0.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Adam, Rosa published the artcileSelf-Assembly of Catalytically Active Supramolecular Coordination Compounds within Metal-Organic Frameworks, Category: bromides-buliding-blocks, the publication is Journal of the American Chemical Society (2019), 141(26), 10350-10360, database is CAplus and MEDLINE.

Supramol. coordination compounds (SCCs) represent the power of coordination chem. methodologies to self-assemble discrete architectures with targeted properties. SCCs are generally synthesized in solution, with isolated fully coordinated metal atoms as structural nodes, thus severely limited as metal-based catalysts. Metal-organic frameworks (MOFs) show unique features to act as chem. nanoreactors for the in situ synthesis and stabilization of otherwise not accessible functional species. Here, authors present the self-assembly of Pd^II SCCs within the confined space of a pre-formed MOF (SCCs@MOF) and its post-assembly metalation to give a Pd^II-Au^III supramol. assembly, crystallog. underpinned. These SCCs@MOFs catalyze the coupling of boronic acids and/or alkynes, representative multi-site metal-catalyzed reactions in which traditional SCCs tend to decompose, and retain their structural integrity as a consequence of the synergetic hybridization between SCCs and MOFs. These results open new avenues in both the synthesis of novel SCCs and their use in heterogeneous metal-based supramol. catalysis.

Journal of the American Chemical Society published new progress about 16523-02-7. 16523-02-7 belongs to bromides-buliding-blocks, auxiliary class Bromide,Sulfone,Aliphatic hydrocarbon chain, name is 2-Bromoethyl Methyl Sulfone, and the molecular formula is C3H7BrO2S, Category: bromides-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Miura, Yozo published the artcileExceptionally persistent nitrogen-centered free radicals. Magnetic behavior and x-ray crystallographic structures of N-(arylthio)-2-tert-butyl-4,6-diarylphenylaminyl and N-(aryl-thio)-4-tert-butyl-2,6-diarylphenylaminyl radicals, Name: Mono(N,N,N-trimethyl-1-phenylmethanaminium) tribromide, the publication is Molecular Crystals and Liquid Crystals Science and Technology, Section A: Molecular Crystals and Liquid Crystals (1997), 271-278, database is CAplus.

The generation, isolation, X-ray crystallog. structures, and magnetic behavior of N-(arylthio)-2-tert-butyl-4,6-diarylphenylaminyls (2) and N-(arylthio)-4-tert-butyl-2,6-diarylphenylaminyls (3) are described. Radicals 2 and 3 were generated by PbO₂ oxidation of N-(arylthio)-2-tert-butyl-4,6-diarylanilines and N-(arylthio)-4-tert-butyl-2,6-diarylanilines, and seven radicals were isolated as the pure radical crystals. The X-ray crystallog. structures of N-[(4-nitrophenyl)thio]-6-tert-butyl-2,4-diphenylphenylaminyl and N-[(4-nitrophenyl)thio]-4-tert-butyl-2,6-diphenylphenylaminyl radicals were determined The magnetic susceptibility measurements for the isolated radicals were carried out in the temperature range 1.8-300 K with a SQUID magnetometer. Among the four radicals studied the two were analyzed by an alternating one-dimensional Heisenberg model with J₁/k = -1.8 (α = 0.86) and -18.2 K (α = 0.16), and the other two were analyzed by a one-dimensional regular Heisenberg model with J₁/k = -30.8 K or a singlet-triplet dimer model with J₁/k = -45.2 K.

Molecular Crystals and Liquid Crystals Science and Technology, Section A: Molecular Crystals and Liquid Crystals published new progress about 111865-47-5. 111865-47-5 belongs to bromides-buliding-blocks, auxiliary class Benzenes, name is Mono(N,N,N-trimethyl-1-phenylmethanaminium) tribromide, and the molecular formula is C10H16Br3N, Name: Mono(N,N,N-trimethyl-1-phenylmethanaminium) tribromide.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Wenny, Malia B. published the artcileUnderstanding Relationships between Free Volume and Oxygen Absorption in Ionic Liquids, HPLC of Formula: 111-83-1, the publication is Journal of Physical Chemistry B (2022), 126(6), 1268-1274, database is CAplus and MEDLINE.

Understanding the factors that govern gas absorption in ionic liquids is critical to the development of high-capacity solvents for catalysis, electrochem., and gas separations Here, we report exptl. probes of liquid structure that provide insights into how free volume impacts the O₂ absorption properties of ionic liquids Specifically, we establish that isothermal compressibility-measured rapidly and accurately through small-angle X-ray scattering-reports on the size distribution of transient voids within a representative series of ionic liquids and is correlated with O₂ absorption capacity. Addnl., O₂ absorption capacities are correlated with thermal expansion coefficients, reflecting the beneficial effect of weak intermol. interactions in ionic liquids on free volume and gas absorption capacity. Mol. dynamics simulations show that the void size distribution-in particular, the probability of forming larger voids within an ionic liquid-has a greater impact on O₂ absorption than the total free volume These results establish relationships between the ionic liquid structure and gas absorption properties that offer design strategies for ionic liquids with high gas solubilities.

Journal of Physical Chemistry B published new progress about 111-83-1. 111-83-1 belongs to bromides-buliding-blocks, auxiliary class Bromide,Aliphatic hydrocarbon chain, name is 1-Bromooctane, and the molecular formula is C25H47NO8, HPLC of Formula: 111-83-1.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Prakash, Chandran published the artcileSynthesis of angularly fused carbocycles via tandem radical cyclization of α-carbonyl radicals, Category: bromides-buliding-blocks, the publication is European Journal of Organic Chemistry (2008), 1535-1543, database is CAplus.

An α-carbonyl radical cyclization approach towards the synthesis of angularly fused tricyclic systems is described. On reduction with tributyltin hydride, bromo ketones yield a α-carbonyl radical that undergoes successive 5-exo-dig/trig cyclizations, resulting in two or four contiguous stereocenters.

European Journal of Organic Chemistry published new progress about 69361-41-7. 69361-41-7 belongs to bromides-buliding-blocks, auxiliary class PROTAC Linker,Aliphatic Linker, name is (4-Bromobut-1-yn-1-yl)trimethylsilane, and the molecular formula is C7H13BrSi, Category: bromides-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary