Camphor-derived β-ketophosphine complexes of palladium(II) and platinum(II)
- 1 January 1990
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 10,p. 3051-3054
- https://doi.org/10.1039/dt9900003051
Abstract
Reaction of chlorodiphenylphosphine with the lithium enolate derived from the treatment of (1R)-endo-(+)-3-bromocamphor (camphor = bornan-2-one) with n-butyl-lithium gives (1R)-endo-(+)-3-diphenylphosphinocamphor (L). This new chiral β-ketophosphine ligand reacts with [Pd(CH3CN)2Cl2] to give trans-[PdL2Cl2], and in a 1 : 1 ratio to give the chloro-bridged dimer [{PdL(µ-Cl)Cl}2]. The ligand L reacts with [Pt(CH3CN)2Cl2] to give trans-[PtL2Cl2]. Thermolysis of [ML2Cl2](M = Pd or Pt) in refluxing xylene gives mixed phosphine–phosphinite complexes with mutually cis chlorides. The complex [PdL2Cl2] reacts with an excess of AgBF4 to give [PdL2][BF4]2 which is shown to contain bidentate binding through the phosphorus and keto-oxygen atoms. All complexes are characterised by i.r., 1H and 31P n.m.r. spectroscopy.This publication has 11 references indexed in Scilit:
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