74144-33-5

Basic information

• Product Name: 1,1,3,3-Tetraphenyl-1,3-diphosphepan-1,3-diiumdibromid
• Synonyms: 1,1,3,3-Tetraphenyl-1,3-diphosphepan-1,3-diiumdibromid
• CAS NO: 74144-33-5
• Molecular Weight: 600.313
• Mol File: 74144-33-5.mol
• Article Data: 2

Chemical Properties

• CAS DataBase Reference: 1,1,3,3-Tetraphenyl-1,3-diphosphepan-1,3-diiumdibromid(CAS DataBase Reference)
• NIST Chemistry Reference: 1,1,3,3-Tetraphenyl-1,3-diphosphepan-1,3-diiumdibromid(74144-33-5)
• EPA Substance Registry System: 1,1,3,3-Tetraphenyl-1,3-diphosphepan-1,3-diiumdibromid(74144-33-5)

Safety Data

• Hazardous Substances Data: 74144-33-5(Hazardous Substances Data)

Upstream product

• 106-93-4 ethylene dibromide 
• 2071-20-7 bis-diphenylphosphinomethane 
• 110-52-1 1,4-dibromo-butane 

Downstream Products

• 74144-36-8 C₂₉H₂₈P₂ 
• 74144-34-6 C₂₇H₂₄P₂ 

Relevant articles and documents

Synthesis of a Double-Carbodiphosphorane and its Precursors

The reaction of 1,4-dibromobutane with bis(diphenylphosphino)methane (1) yields two products, one of which is identified as butane-1,4-bis (3a).Transylidation of this bis-phosphonium salt using two equivalents of (CH3)3P=CH2 affords the bis-ylide 2 (4) in high yields.This conversion can be reversed on treatment of 4 with etheral HCl (to give 3b).Methylation of 4 with CH3I occurs at phosphorus, however, and produces the bis-semiylide salt (5), 2(2+)2I(-).Transylidation of 5 (again with (CH3)3P=CH2) leads to the bis-carbodiphosphorane (6), 2.All compounds were characterized by elemental and detailed NMR analyses.The second product of the above quaternisation reaction is a cyclic bis-phosphonium salt (2) with a seven-membered ring structure. - Key words: 1,4-Dibromobutane, Transylidation, Carbodiphosphorane, Bis-carbodiphosphorane, Ylides