Category: 594-81-0

Namba, Yoshiyuki published the artcileCrystal structure and the molecular behavior of 2,3-dibromo-2,3-dimethylbutane at room temperature, Name: 2,3-Dibromo-2,3-dimethylbutane, the publication is Bulletin of the Chemical Society of Japan (1970), 43(3), 677-81, database is CAplus.

The crystal structure of 2,3-dibromo-2,3-dimethylbutane at room temperature has a disordered nature. In the crystal, trans-form mols. have at least 4 orientations of equal statistical weight around the axes parallel to the [001] direction. Therefore, in spite of the low symmetry of the mol., the crystal belongs to the tetragonal system and has the space group of I4/mmm, while a = 7.38, c = 8.12 Å, and Z = 2.

Bulletin of the Chemical Society of Japan 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

Koide, Tsutomu published the artcileDielectric study of solid 2,3-dibromo-2,3-dimethylbutane, Formula: C6H12Br2, the publication is Nippon Kagaku Zasshi (1970), 91(7), 622-5, database is CAplus.

The dielec. constant (D) of a crystal of 2,3-dibromo-2,3-dimethyl-butane was measured at 5-100 kHz at -170 to 100°. The measurements were made with an a.c. bridge. The sample was made by pressing crystal powder. The compactness was 0.98. No significant change of D was found at the transition point of -90°, while remarkable change was observed at another transition point of 70-80°. At -90 to 70°, D was ∼2.6. The theoretical value of D was calculated by the equation of Froelich, the result of which showed that the trans model was more favorable than the model of trans-gauche equilibrium

Nippon Kagaku Zasshi 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, Formula: C6H12Br2.

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

Matsumura, Yoshihiro published the artcileStereoselective homocoupling of phenylacetic acid derivatives utilizing electrochemically generated base, Quality Control of 594-81-0, the publication is Electrochimica Acta (1997), 42(13-14), 2233-2239, database is CAplus.

Electrochem. generated base (EGB) was cathodically prepared from pyrrolidone, and it was used as an efficient base to generate an anion of Me phenylacetate. The anion was oxidized by iodine to afford di-Me 2,3-diphenylsuccinate in high yield and high dl selectivity. Optically active 2,3-diphenylsuccinic acid derivatives was prepared by this EGB/iodine method. The oxidative homocoupling of Me phenylacetate was also achieved with a catalytic amount of iodine by using an electrochem. mediator system.

Electrochimica Acta 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, Quality Control of 594-81-0.

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

Mulders, J. published the artcileMechanism of dehalogenation of vic-dibromoalkanes by iodide ion. Duality of mechanisms for the process of direct elimination, HPLC of Formula: 594-81-0, the publication is Bulletin des Societes Chimiques Belges (1963), 322-45, database is CAplus.

cf. CA 58, 13737c. The iodide ion-induced elimination of Br from the following dibromides in Me₂CO was studied spectrophotometrically by the method of initial rates: 1,2-dibromopropane, dl- and meso2,3-dibromobutanes, 1,2-dibromo-2-methylpropane, 2,3-dibromo-2-methylbutane, 2,3-dibromo-2,3-dimethylbutane, and meso-1,2-dibromo-1,2-diphenylethane. Values for k, E, and log PZ were calculated Reactions of the last 3 compounds had values of k greater than 10^-5, were inhibited by salts not containing a common ion, and showed no effect (other than inhibition due to ionic forces) with LiBr; reactions of the other compounds had values of k less than 10^-5, showed no effect with salts not containing a common ion, and were inhibited by LiBr. The results are interpreted in terms of the existence of an intermediate (I) for reactions of the 1st members of the series; reactions of the 3 last compounds probably involve a synchronous transition state (II).

Bulletin des Societes Chimiques Belges 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, HPLC of Formula: 594-81-0.

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

Suga, Hiroshi published the artcileCrystallochemical study by differential thermal analysis. II. Detection of phase transition, Application In Synthesis of 594-81-0, the publication is Nippon Kagaku Zasshi (1961), 29-32, database is CAplus.

The phase transition was detected for some mol. crystals by means of a programmed automatic controlling-and-recording apparatus for differential thermal analysis. 2,3-Dimethyl-2,3-dibromobutane showed transitions at -91 and 70-80° with estimated heats of transition of about 500 and 1000 cal./mole, resp. Si(OMe)₄, AcNHMe, and triglycine sulfate showed transitions at -98, 2, and 0-50° with estimated heats of transition of about 100, 100, and 200 cal./mole, resp. The phase transition of resorcinol from the α-type to the β-type was detected thermally. The estimated enthalpy accompanying this transition agreed with the value of Ubbelohde and Robertson (CA 31, 7719³) calculated from the heats of solution of the 2 crystalline forms in water.

Nippon Kagaku Zasshi 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 C16H24BF4Ir, Application In Synthesis of 594-81-0.

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

Ruasse, Marie Francoise published the artcileSolvation and steric effects on electrophilic reactivity of ethylenic compounds. 1. Stereochemistry and bromination of congested adamantylidenealkanes, Category: bromides-buliding-blocks, the publication is Journal of Organic Chemistry (1990), 55(8), 2298-303, database is CAplus.

Rate constants for bromine addition to I (R, R¹ given: H, H; H, Me; H, Et; H, Me₂CH; H, Me₃C; H, neopentyl; Me, Me; Et, Et; Me, Me₂CH; Me₂CH, Me₂CH) were determined in MeOH and in AcOA. The data indicate that solvent effect is markedly smaller than that on linear alkenes, which suggests that greater steric retardation in I can be attributed to mechanistic changes: inhibition of nucleophilic solvent assistance in the ionization step and/or return resulting from a slow product-forming step.

Journal of Organic Chemistry 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, Category: bromides-buliding-blocks.

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

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

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

Morino, Yonezo published the artcileDipole moments of 2,3-dihalo-2,3-dimethylbutane, Recommanded Product: 2,3-Dibromo-2,3-dimethylbutane, the publication is Bulletin of the Chemical Society of Japan (1955), 165-71, database is CAplus.

cf. C.A. 45, 947i; 48, 13297h. The dipole moments of X(Me)₂CC(Me)₂X [where X = Cl(I) and Br(II)] are 1.24, -; -, 0.88; 1.30, -; -, 0.97; 1.37, 1.03; and 1.47, 1.15 for -20; -15; 0; 6; 25; and 55°, resp., in CCl₄, and 1.74, 1.24 D. at 25° in C₆H₆. These data indicate the existence of a rotational isomer or gauche form with a ΔΕ of 1.1 and 1.3 for I and 1.5 and 1.5 kcal./mole for II in CCl₄ and heptane, resp. The dipole moments of the gauche form are 2.8 and 3.2 for I and 2.6 and 2.6 D. for II in CCl₄ and heptane, resp.

Bulletin of the Chemical Society of Japan 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, Recommanded Product: 2,3-Dibromo-2,3-dimethylbutane.

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