Detail of "13440-24-9"

CAS Number:
13440-24-9
Name:
Benzene,1,1'-[(1R,2S)-1,2-dibromo-2-phenylethyl]-, rel-
Molecular Structure:
Formula:
C14H12 Br2
Molecular Weight:
340.0531
Synonyms:
Benzene,1,1'-(1,2-dibromo-1,2-ethanediyl)bis-, (R*,S*)- (9CI); Bibenzyl, a,a'-dibromo-, meso- (8CI); erythro-1,2-Dibromo-1,2-diphenylethane;meso-1,2-Dibromo-1,2-diphenylethane; meso-Dibromostilbene; meso-Stilbenedibromide; meso-a,b-Dibromostilbene
EINECS:
227-324-7
Density:
1.613 g/cm³
Melting Point:
241 °C (dec.)(lit.)
Boiling Point:
323.8 °C at 760 mmHg
Flash Point:
173.2 °C
Hazard Symbols:
C
Risk Codes:
22-34
Safety:
26-36/37/39-45 Details
Transport Information:
UN 1759 8

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1,2-DIBROMO-1,2-DIPHENYLETHANE

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Direct and indirect electrolysis of 1,2-dihalo-1,2-diphenylethanes: Direct and indirect electrolysis of 1,2-dihalo-1,2-diphenylethanes. Lund, Henning; Hobolth, Ejnar (Dep. Org. Chem.Chemicals with cas numbers 15870-87-8 and 13440-24-9 also play role., Univ. Aarhus, Aarhus, Den.). Acta Chem. Scand., Ser. B, B30(9), 895-8 (English) 1976. CODEN: ACBOCV. DOCUMENT TYPE: Journal CA Section: 25 (Noncondensed Aromatic Compounds) PhCHRCHRPh (R = Br, Cl) (meso and d,l) were reduced in DMF at a Hg cathode and indirectly by means of electrolytically generated anion radicals to give a mixt. of cis- and trans-stilbene, the ratio of which increased with the size and concn. of the cation, presumably due to ion-pairing between the cation and an anionic intermediate. .

Elimination reactions of stilbene dibromides: Elimination reactions of stilbene dibromides. Dehydrobromination by acetate, cyanide or chloride ions in dimethylformamide. Avraamides, James; Parker, Alan J. (Sch. Math. Phys.Chemicals with cas numbers 13440-24-9 and 27297-07-0 also play role. Sci., Murdoch Univ., Murdoch 6150, Australia). Aust. J. Chem., 36(9), 1705-17 (English) 1983. CODEN: AJCHAS. ISSN: 0004-9425. DOCUMENT TYPE: Journal CA Section: 22 (Physical Organic Chemistry) Rates of dehydrobromination of 4-nitro- and -methoxystilbene dibromides with AcO-, cyanide or Cl- ions in DMF were measured. Product anal. indicated a strong preference for anti elimination. Probable transition-state structures utilized by each of the 3 nucleophiles are described. Attack by the base may be at either b-H or C-a. The slowest reaction is with Cl-, which also gives the highest anti/syn elimination product ratio. .