Category: 594-81-0

Larsen, John W. published the artcileThermodynamic stabilities of some cyclic halonium ions in magic acid, SDS of cas: 594-81-0, the publication is Journal of the American Chemical Society (1972), 94(5), 1614-19, database is CAplus.

The heats of formation of a series of methyl-substituted ethylene- and tetramethylene-bromonium ions and a chloronium ion from the appropriate dihaloalkane precursors were measured calorimetrically in 11.5 mole % SbF5-F SO3H at -60°. The tetramethylenebromonium ions are about as stable as the tert-Bu cation and are ∼10 kcal/mole more stable than a correspondingly substituted ethylenebromonium ion. The tetramethylenechloronium ion is ∼7.5 kcal/mole less stable than its bromo analog. The interaction of a Me group with a 3-membered ring is unusually favorable.

Journal of the American Chemical Society 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, SDS of cas: 594-81-0.

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

D’yachenko, A. I. published the artcilePreparation of spiro[2.4]-4,6-heptadienes by the cycloalkylation of 1,3-cyclopentadiene with 1,2-dibromoalkanes under phase transfer catalysis conditions, Computed Properties of 594-81-0, the publication is Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya (1984), 1664-6, database is CAplus.

Cycloalkylation of cyclopentadiene with RCHBrCHBrR¹ (R = R¹ = H, Me; R = H, R¹ = Me) in 50% aqueous NaOH containing PhCH₂NEt₃⁺ Cl^– in 1.1:1:4:0.005-0.02 molar ratio gave 70-85% title compounds (I; same R, R¹). No I were obtained with BrCMe₂ZBr (Z = CH₂, CHMe, CMe₂).

Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya 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

Tanner, Dennis D. published the artcileReexamination of the reaction of a “graded set” of radicals with N-bromosuccinimide: a kinetic argument concerning the π, and ω states of succinimidyl, Product Details of C6H12Br2, the publication is Journal of the American Chemical Society (1985), 107(23), 6584-9, database is CAplus.

The NBS [N-bromosuccinimide] of CH₂Cl₂ with added substrates which yield stable radicals was reinvestigated. The proposal that these substrates would affect the ratio of BrCH₂CH₂CONCO (BPI)/CHCl₂Br, the solvent bromination product, was not substantiated. Bromination of Me₂CHCHMe₂, cyclohexene, and butadiene by NBS in CH₂Cl₂ plus H₂C:CCl₂ gives essentially the same BPI/CHCl₂Br ratios as in the presence of neopentane but large yields of brominated and polybrominated products. Similar reactions in the presence of up to 2.5 M C₆H₆ always yield BPI but also highly brominated benzene derivatives BPI is detected in the NBS bromination of CHCl₃ under all conditions and is the major product in the presence of H₂C:CCl₂ chloride. Photolysis of N-iodosuccinimide-I₂ in CHCl₃ gives ICH₂CH₂CONCO as the chief product. None of these observations support the hypothesis of σ and π states of the succinimidyl radical (S·), while the NBS results appear consistent with competing S·-Br· chains.

Journal of the American Chemical Society 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 C12H16N2O2, Product Details of C6H12Br2.

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

Boyer, Joseph H. published the artcileNitrodibromoacetonitrile: an agent for bromination and for the formation of adducts formally derived from cyanonitrocarbene, SDS of cas: 594-81-0, the publication is Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999) (1989), 1381-5, database is CAplus.

The reactions of nitrodibromoacetonitrile (NDBA) with alkenes, aromatic compounds, amines, and sulfides have been studied. Products were formally derived from bromine or nitrocyanocarbene except for bis(2-bromocyclohexyl)nitroacetonitrile, an adduct (2:1) obtained from cyclohexene and NDBA. 2,3-Dimethylbut-2-ene was converted into 3-cyano-4,4,5,5-tetramethyl-4,5-dihydroisoxazole 2-oxide and 2,3-dibromo-2,3-dimethylbutane. meso-1,2-Dibromo-1,2-diphenylethane was obtained from trans-stilbene. In a reaction catalyzed by copper, benzene and NDBA gave benzoyl cyanide. From anthracene, phenol, and cupric acetylacetonate, 9,10-dibromoanthracene, 4-bromophenol, and cupric bromoacetylacetonate were obtained, resp. Di-Me sulfide, tetrahydrothiophene, and triethylamine afforded the corresponding sulfonium and ammonium cyanomethylide derivatives and, with the latter, co-formation of triethylammonium bromide. Rationales for the reactions are discussed.

Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999) 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, SDS of cas: 594-81-0.

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

Perera, Tharushi A. published the artcilePhotoreduction of Pt(IV) Chloro Complexes: Substrate Chlorination by a Triplet Excited State, Formula: C6H12Br2, the publication is Inorganic Chemistry (2014), 53(14), 7608-7621, database is CAplus and MEDLINE.

The Pt(IV) complexes trans-Pt(PEt₃)₂(Cl)₃(R) (2; R = Cl, Ph, 9-phenanthryl, 2-trifluoromethylphenyl, 4-trifluoromethylphenyl, 3-perylenyl) were prepared by chlorination of the Pt(II) complexes trans-Pt(PEt₃)₂(R)(Cl) (1) with Cl₂ gas or PhICl₂. Mixed bromo-chloro complexes trans,trans-Pt(PEt₃)₂(Cl)₂(Br)(R) (R = 9-phenanthryl, 4-trifluoromethylphenyl), trans,cis-Pt(PEt₃)₂(Cl)₂(Br)(4-trifluoromethylphenyl), trans,trans-Pt(PEt₃)₂(Br)₂(Cl)(R) (R = 9-phenanthryl), and trans,cis-Pt(PEt₃)₂(Br)₂(Cl)(4-trifluoromethylphenyl) were obtained by halide exchange or by oxidative addition of Br₂ to 1 or Cl₂ to trans-Pt(PEt₃)₂(R)(Br). Except for 2 (R = Ph, 4-trifluoromethylphenyl), all of the Pt(IV) complexes are photosensitive to UV light and undergo net halogen reductive elimination to give Pt(II) products, trans-Pt(PEt₃)₂(R)(X) (X = Cl, Br). Chlorine trapping experiments with alkenes indicate a reductive-elimination mechanism that does not involve mol. chlorine and is sensitive to steric effects at the Pt center. DFT calculations suggest a radical pathway involving ³LMCT excited states. Emission from a triplet is observed in glassy 2-methyltetrahydrofuran at 77 K where photoreductive elimination is markedly slowed.

Inorganic 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, Formula: C6H12Br2.

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

Mathey, Francois published the artcilePyrolysis of some phosphorus trihalide-diene addition compounds, Recommanded Product: 2,3-Dibromo-2,3-dimethylbutane, the publication is Comptes Rendus des Seances de l’Academie des Sciences, Serie C: Sciences Chimiques (1969), 268(21), 1902-4, database is CAplus.

Pyrolysis of H2C:-CMeCMe:CH2.PBr3, H2C:CMeCMe:CH2.PCl3, and H2C:-CMeCH:CH2.PBr3 in vacuo at <200° gave, resp., PBr3 or PCl3 and Me2CBrCBrMe2, ClCH2CHMeCClMe2 or BrCH2CH2CBrMe2 together with polymeric residues. The products were identified by their N.M.R. spectra, which are discussed.

Comptes Rendus des Seances de l’Academie des Sciences, Serie C: Sciences Chimiques 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

Sweeting, Orville J. published the artcile1,3-Dienes. II. Stereoisomerism of bromides and glycols derived from 2,3-dimethyl-1,3-butadiene, Recommanded Product: 2,3-Dibromo-2,3-dimethylbutane, the publication is Journal of the American Chemical Society (1946), 1057-61, database is CAplus.

cf. C.A. 35, 1377.4. (MeC:CH₂)₂ (I) (41 g.) in 200 mL. CHCl₃ at -10°, treated with 80 g. Br in 150 mL. CHCl₃ during 5 h., gives 87% of the trans-1,4-dibromide (II), b₅ 88.5-91.5°, m. 47-7.5°, and small quantities of the cis-isomer (III), b₅ 77.5-9.5°, d₄²⁵ 1.6695, n_D²⁵ 1.5558, n_D⁵⁰ 1.5420, and of the 1,2,3,4-tetrabromide (IV), m. 138.5-9°. I (76 g.) in 200 mL. petr. ether at -5°, treated with 148 g. Br at such a rate that the temperature remained below 0° (7 h.), gives 25.5 g. of IV, 75% of II, and 4% of III. When the reaction of I and Br in CHCl₃ is illuminated with UV light (temperature not above 30°) there result 10% of II and 46% of III; without illumination, 80% of II was formed. Ozonolysis of III gives 75% of BrCH₂Ac; no HCHO was found. II (25 g.), heated under reduced pressure at 120° for 15 h., gives 11.1 g. of III. II (65 g.) and 60 g. AcOK in 550 mL. absolute EtOH, refluxed 10 h., give 67% of trans-1,4-diacetoxy-2,3-dimethyl-2-butene (V), m. 38.5-9°; similarly, III gives 75% of the cis-isomer (VI) of V, b₇ 108-11°, b₂₈ 138-44°. V (5 g.) in 100 mL. CCl₄, treated with 4 g. Br at -10°, gives 17% of the 2,3-di-Br derivative, b₇ 70-2°, which rapidly becomes green and then black; the same compound appears to be formed from VI, and also by stirring 15 g. of IV and 25 g. AcOAg in AcOH for 14 h. IV does not react with AcOK. V (10 g.) and 31.5 g. Ba(OH)₂ in 50 mL. EtOH, refluxed and stirred for 5 h., give 46% of trans-2,3-dimethyl-2-butene-1,4-diol (VII), m. 57-8° (bisphenylurethane, m. 157-7.5°); the cis-isomer (VIII), b₅ 110-15° (bisphenylurethane, m. 147-8°). Pinacol and aqueous HBr give 2,3-dibromo-2,3-dimethylbutane, m. 177-7.5° (sealed tube). The following values for μ × 10¹⁸ are given: II 1.72, III 2.49, IV 1.55, V 1.90, VI 2.58, VII 1.93, VIII 2.52, and trans-1,4-dibromo-2-butene 1.63. The phys. and chem. evidence affords reasonable grounds for assigning the trans-configuration to II, V, and VII. All the evidence is consistent with the view that III is the cis-isomer and that VI and VIII are largely, if not entirely, the cis-isomers.

Journal of the American Chemical Society 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 C17H37NO3, Recommanded Product: 2,3-Dibromo-2,3-dimethylbutane.

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

Sweeting, Orville J. published the artcile1,3-Dienes. II. Stereoisomerism of bromides and glycols derived from 2,3-dimethyl-1,3-butadiene, Recommanded Product: 2,3-Dibromo-2,3-dimethylbutane, the publication is Journal of the American Chemical Society (1946), 1057-61, database is CAplus.

cf. C.A. 35, 1377.4. (MeC:CH₂)₂ (I) (41 g.) in 200 mL. CHCl₃ at -10°, treated with 80 g. Br in 150 mL. CHCl₃ during 5 h., gives 87% of the trans-1,4-dibromide (II), b₅ 88.5-91.5°, m. 47-7.5°, and small quantities of the cis-isomer (III), b₅ 77.5-9.5°, d₄²⁵ 1.6695, n_D²⁵ 1.5558, n_D⁵⁰ 1.5420, and of the 1,2,3,4-tetrabromide (IV), m. 138.5-9°. I (76 g.) in 200 mL. petr. ether at -5°, treated with 148 g. Br at such a rate that the temperature remained below 0° (7 h.), gives 25.5 g. of IV, 75% of II, and 4% of III. When the reaction of I and Br in CHCl₃ is illuminated with UV light (temperature not above 30°) there result 10% of II and 46% of III; without illumination, 80% of II was formed. Ozonolysis of III gives 75% of BrCH₂Ac; no HCHO was found. II (25 g.), heated under reduced pressure at 120° for 15 h., gives 11.1 g. of III. II (65 g.) and 60 g. AcOK in 550 mL. absolute EtOH, refluxed 10 h., give 67% of trans-1,4-diacetoxy-2,3-dimethyl-2-butene (V), m. 38.5-9°; similarly, III gives 75% of the cis-isomer (VI) of V, b₇ 108-11°, b₂₈ 138-44°. V (5 g.) in 100 mL. CCl₄, treated with 4 g. Br at -10°, gives 17% of the 2,3-di-Br derivative, b₇ 70-2°, which rapidly becomes green and then black; the same compound appears to be formed from VI, and also by stirring 15 g. of IV and 25 g. AcOAg in AcOH for 14 h. IV does not react with AcOK. V (10 g.) and 31.5 g. Ba(OH)₂ in 50 mL. EtOH, refluxed and stirred for 5 h., give 46% of trans-2,3-dimethyl-2-butene-1,4-diol (VII), m. 57-8° (bisphenylurethane, m. 157-7.5°); the cis-isomer (VIII), b₅ 110-15° (bisphenylurethane, m. 147-8°). Pinacol and aqueous HBr give 2,3-dibromo-2,3-dimethylbutane, m. 177-7.5° (sealed tube). The following values for μ × 10¹⁸ are given: II 1.72, III 2.49, IV 1.55, V 1.90, VI 2.58, VII 1.93, VIII 2.52, and trans-1,4-dibromo-2-butene 1.63. The phys. and chem. evidence affords reasonable grounds for assigning the trans-configuration to II, V, and VII. All the evidence is consistent with the view that III is the cis-isomer and that VI and VIII are largely, if not entirely, the cis-isomers.

Journal of the American Chemical Society 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 C17H37NO3, Recommanded Product: 2,3-Dibromo-2,3-dimethylbutane.

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

Grosse, Aristid V. published the artcileThe alkylation of paraffins with olefins. The identification of the paraffins formed, Synthetic Route of 594-81-0, the publication is Journal of Organic Chemistry (1943), 438-47, database is CAplus.

The hexanes obtained by the reaction between Me₃CH and CH₂:CH₂ with BF₃ or AlCl₃ as catalyst are investigated and identified by converting them into Br and NO₂ derivatives and by the Raman spectrum. The hexane fractions consist chiefly of 90-70% Me₂CHCHMe₂ (I), 10-25% Me₂CHPr (II) and of less than 3% Me₃CEt (III). ETCHMeEt and n-hexane cannot be detected and may be present only in traces, if at all. Since I is the only hexane which gives a solid Br derivative on direct bromination, the hexane fraction is brominated in direct sunlight, giving Me₂CBr CBrMe₂ (IV). IV sublimes 165-75° without melting and m. 166-8° (decomposition) in a sealed tube. On further bromination, IV gives Me(BrCH₂)CBrCBr(CH₂Br)Me, m. 130-1°. When boiled with Zn in 95% EtOH, IV gives Me₂C:CMe₂, b₇₆₀ 72°, n²⁰_D 1.4155, which is converted by Thiele’s method (Ber. 27, 456(1894)) into Me₂C(NO)CClMe₂, m. 121°. Me₂CBrCHMe₂ (V), m. 24-5°, and Me₃CCBr₂Me, m. 191.5°, are not formed by direct bromination. The liquid bromides left after the separation of IV consist chiefly of monobromides, b₂₀₀ 75-85°, n²⁰_D 1.45, which are free from V. Nitration of the hexane fraction by boiling 20 cc. with 60 cc. 38% HNO₃ for 6 hrs. gives Me₂C(NO₂)C(NO₂)₂Et, colorless plates or needles, m. 96°, indicating the presence of II in the hexane mixture The presence of III was first observed when a fraction, b₇₆₀ 49.2-9.9°, d²⁰₄ 0.6492, n²⁰_D 1.3689, was obtained. Treatment of this fraction with 38% HNO₃ at 120° and distillation give 3-nitro-2,2-dimethylbutane, b₇₆₀ 168°. It dissolves completely in 5% EtONa in EtOH, remains in solution on addition of an equal volume of H₂O and is precipitated from this solution by CO₂ as an oil. For the results of the Raman spectrum, see C. A. 34, 3205.2. The reactions taking place between Me₃CH and CH₂:CH₂ in the presence of catalysts are briefly discussed.

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, Synthetic Route of 594-81-0.

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

Chia, Lawrence H. L. published the artcileMolecular polarizability. Conformations of polar substituted ethanes, SDS of cas: 594-81-0, the publication is Journal of the Chemical Society, Perkin Transactions 2: Physical Organic Chemistry (1972-1999) (1973), 766-71, database is CAplus.

The mol. distributions of the rotational isomers and the dihedral angles between polar groups of CICH2CCl:CH2 and ten bromo- and chloro-substituted ethane derivatives were estimated from dipole moments and molar Kerr constants determined for CCl4 solutions at infinite dilution at 25°. Polarizations and refractions of these solutions were also determined

Journal of the Chemical Society, Perkin Transactions 2: Physical Organic Chemistry (1972-1999) 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, SDS of cas: 594-81-0.

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