Synthesis and properties of Group 5B ligand analogues of o-phenylenebis(dimethylarsine), o-C6H4(EMe2)(E′Me2) where E, E′= P, N, As, or Sb
- 1 January 1979
- journal article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 11,p. 1718-1724
- https://doi.org/10.1039/dt9790001718
Abstract
Lithium dimethylphosphide prepared from lithium and PMe2Ph in tetrahydrofuran reacts with o-dichlorobenzene to produce o-phenylenebis(dimethylphosphine). Similar reactions using the appropriate o-bromophenyl derivatives o-C6H4Br(Y)(Y = NMe2, AsMe2, or SbMe2) yield o-C6H4(PMe2)Y. o-Phenylenebis(dimethylstibine) is best prepared from (o-bromophenyl)dimethylstibine and Na[SbMe2]. Preparations for the other members of the series, o-C6H4(AsMe2)(SbMe2), o-C6H4(AsMe2)(NMe2), and o-C6H4(SbMe2)(NMe2), and for (o-methoxyphenyl)- and (o-methylthiophenyl)-dimethylphosphine o-C6H4(PMe2)Z (Z = OMe or SMe) are reported. The 1H and 31P n.m.r. and mass spectra of the ligands, intermediates, and quaternary derivatives are reported and discussed.Keywords
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