34478-62-1

Basic information

• Product Name: Diphosphine, 1,2-diphenyl-
• CAS NO: 34478-62-1
• Molecular Formula: C12H12P2
• Molecular Weight: 218.175
• Mol File: 34478-62-1.mol
• Article Data: 13

Chemical Properties

• CAS DataBase Reference: Diphosphine, 1,2-diphenyl-(CAS DataBase Reference)
• NIST Chemistry Reference: Diphosphine, 1,2-diphenyl-(34478-62-1)
• EPA Substance Registry System: Diphosphine, 1,2-diphenyl-(34478-62-1)

Safety Data

• Hazardous Substances Data: 34478-62-1(Hazardous Substances Data)

Upstream product

• 3376-52-1 pentaphenylcyclopentaphosphane 
• 638-21-1 phenylphosphane 
• 644-97-3 Dichlorophenylphosphine 
• 536-74-3 phenylacetylene 
• 501-65-5 diphenyl acetylene 
• 513-81-5 2,3-dimethyl-buta-1,3-diene 
• 2213-63-0 2,3-dichloroquinoxaline 
• 666857-23-4 phenylphosphine borane 
• 66537-67-5 (erythro/erythro)-1,2,3-triphenyltriphosphane 
• 67-56-1 methanol 
• 82340-08-7 1,2-Diphenyl-1,2-bis<1-(trimethylsiloxy)ethenyl>diphosphan 

Downstream Products

• 638-21-1 phenylphosphane 

Relevant articles and documents

Reactions of Low-Coordinate Cobalt(0)-N-Heterocyclic Carbene Complexes with Primary Aryl Phosphines

Aiming to get knowledge on the reactivity of low-coordinate cobalt(0) species toward primary phosphines, the reactions of [(IPr)Co(vtms)2] and [(ICy)2Co(vtms)] (IPr = 1,3-bis(2′,6′-diisopropylphenyl)imidazol-2-ylidene, ICy = 1,3-dicyclohexylimidazol-2-ylidene, and vtms = vinyltrimethylsilane) with several primary aryl phosphines have been examined. The reactions of [(IPr)Co(vtms)2] and [(ICy)2Co(vtms)] with H2PDmp (Dmp = 2,6-dimesitylphenyl) at 80 °C furnish the diamagnetic cobalt(I) phosphido complexes [(NHC)Co(PHDmp)] (NHC = IPr, 1; ICy, 2) that feature the Co-(η6-mesityl) interaction. Complex 1 can coordinate CO to generate the terminal phosphido complex [(IPr)Co(CO)3(PHDmp)] (3) and can be oxidized by [Cp2Fe][BArF4] to yield the cobalt(II) phosphido complex [(IPr)Co(PHDmp)][BArF4] (4, BArF4 = tetrakis(3,5-di(trifluoromethyl)phenyl)borate). For the reactions with sterically less-hindered primary phosphines, [(IPr)Co(vtms)2] is inert toward H2PC6H2-2,4,6-Me3 (H2PMes) at room temperature, whereas [(ICy)2Co(vtms)] can react with H2PMes at room temperature to produce the cobalt(II) phosphido alkyl complex trans-[(ICy)2Co(CH2CH2SiMe3)(PHMes)] (5). At 80 °C, the cobalt(0) alkene complexes [(IPr)Co(vtms)2] and [(ICy)2Co(vtms)] and also the cobalt phosphido complexes, 1, 2, and 5 can serve as precatalysts for the dehydrocoupling reaction of H2PMes to afford MesHPPHMes. NHC-Co(I)-phosphido species are proposed as the in-cycle intermediates for these cobalt-catalyzed dehydrocoupling reactions.

Facile, Catalytic Dehydrocoupling of Phosphines Using β-Diketiminate Iron(II) Complexes

Catalytic dehydrocoupling of primary and secondary phosphines has been achieved for the first time using an iron pre-catalyst. The reaction proceeds under mild reaction conditions and is successful with a range of diarylphosphines. A proton acceptor is not needed for the transformation to take place, but addition of 1-hexene does allow for turnover at 50°C. The catalytic system developed also facilitates the dehydrocoupling of phenylphosphane and dicyclohexylphosphane. A change in solvent switches off dehydrocoupling to allow hydrophosphination of alkenes.

Selective dehydrocoupling of phosphines by lithium chloride carbenoids

The development of a simple, transition-metal-free approach for the formation of phosphorus-phosphorus bonds through dehydrocoupling of phosphines is presented. The reaction is mediated by electronically stabilized lithium chloride carbenoids and affords a variety of different diphosphines under mild reaction conditions. The developed protocol is simple and highly efficient and allows the isolation of novel functionalized diphosphines in high yields.