88682-34-2

Basic information

• Product Name: 1H-1,3-Benzodiphospholium, 2,3-dihydro-1,1,3,3-tetraphenyl-, dibromide
• CAS NO: 88682-34-2
• Molecular Formula: C31H26P2.2Br
• Molecular Weight: 620.303
• Mol File: 88682-34-2.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: 1H-1,3-Benzodiphospholium, 2,3-dihydro-1,1,3,3-tetraphenyl-, dibromide(CAS DataBase Reference)
• NIST Chemistry Reference: 1H-1,3-Benzodiphospholium, 2,3-dihydro-1,1,3,3-tetraphenyl-, dibromide(88682-34-2)
• EPA Substance Registry System: 1H-1,3-Benzodiphospholium, 2,3-dihydro-1,1,3,3-tetraphenyl-, dibromide(88682-34-2)

Safety Data

• Hazardous Substances Data: 88682-34-2(Hazardous Substances Data)

Upstream product

• 829-85-6 diphenylphosphane 
• 95-50-1 1,2-dichloro-benzene 
• 13991-08-7 o-phenylenebis(diphenylphosphine) 
• 74-95-3 1,1-dibromomethane 

Downstream Products

• 88682-53-5 [2-(Diphenyl-phosphinoyl)-phenyl]-methyl-diphenyl-phosphonium; bromide 
• 88682-41-1 1,1,3,3-tetraphenyl-3λ⁵-phospha-1-phosphoniaindene bromide 
• 88682-49-9 1,2-didehydro-1,1,3,3-tetraphenyl-1λ⁵,3λ⁵-diphosphaindene 

Relevant articles and documents

Carbodiphosphorane Isomers Based on a 1,3-Diphosphaindane Skeleton, and Their Precursors

In a search for ring-strained carbodiphosphoranes , the diastereomeric bis-phosphanes 1a(RR, SS, RS) and the symmetrical analogue 1c have been converted into the corresponding cyclic methylene-bridged bis-phosphonium bromides 2a,c and hexafluorophosphates 2b. 2a(RR;SS) and 2a(RS) were separated by fractional crystallization.Treatment of 2a-c with base (NH3 or n-BuLi) yields, in a first step, the semi-ylide salts 3a-c which, unexpectedly, undergo hydrolytic or ammonolytic cleavage at the ylidic PCHP bridge resulting in formation of the phosphane oxide or phosphane imine salts 5a, c and 6a, respectively.The second deprotonation step, using (C2H5)3P=CHCH3 as a transylidating agent, affords the conjugated bis-ylide 7a in the case of 2a, 3a(RS), but gives the carbodiphosphorane 4c in the case of the methyl-free 2c, 3c.With n-BuLi, 2a(RS) also yields the analogous species 4a(RS), probably as an Li(+) adduct, as proven by its conversion into the symmetrical methylated product 8a(RS).- 1c is methylated with CH3I at one P centre only.The resulting phosphonium salt 10 gives the mono-ylide 11 on treatment with NaNH2.