452969-86-7

Basic information

• Product Name: α-lithium methylenediphenylphosphine borane
• CAS NO: 452969-86-7
• Molecular Weight: 219.988
• Mol File: 452969-86-7.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: α-lithium methylenediphenylphosphine borane(CAS DataBase Reference)
• NIST Chemistry Reference: α-lithium methylenediphenylphosphine borane(452969-86-7)
• EPA Substance Registry System: α-lithium methylenediphenylphosphine borane(452969-86-7)

Safety Data

• Hazardous Substances Data: 452969-86-7(Hazardous Substances Data)

Upstream product

• 598-30-1 sec.-butyllithium 
• 1486-28-8 diphenyl(methyl)phosphine 

Relevant articles and documents

Synthetic methodologies for tripodal phosphines. The preparation of MeSi(CH2PPh2)3 and n-BuSn(CH2PPh2)3 and a comparison of their rhodium(I) andruthenium(II) coordination chemistry. The X-ray crystal structures of [ Rh(NBD){n-BuSn(CH2PPh2)3}](OTf) and [Rh(NBD){MeSi(CH2PPh2)3}](OTf)

The preparation of the new tripodal ligands MeSi(CH2PPh2)3 (Si-triphos) and n-BuSn(CH2PPH2)3 (Sn-triphos) and their complexes of rhodium(I) of the type [Rh(NBD)(tripod)](OTf) (NBD=norbornadiene, OTf=triflate) and of ruthenium(II) of type [Ru(O2CCF3)2(tripod)], is reported. The coordination chemistry of the new tripodal phosphines, and in particular that of Sn-triphos, differs significantly from that of MeC(CH2PPh2)3 (triphos). A comparison of the X-ray structure of [Rh(NBD)(triphos)](OTf) with those of the new complexes [Rh(NBD)(Sn-triphos)](OTf) and [Rh(NBD)(Si-triphos)](OTf) shows that the steric requirements of the ligands RE(CH2PPh2)3 (E=C, Si and Sn), increase from the carbon to the tin compound. The coordination chemistry of ruthenium(II) indicates that, relative to triphos,Sn-triphos displays an enhanced steric bulk which, however, is not suff icient to stabilize the mononuclear, five-coordinate dichloro complexes.