Diphosphine complexes of iridium(I), palladium(II), and platinum(II)
- 1 January 1977
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 20,p. 1971-1976
- https://doi.org/10.1039/dt9770001971
Abstract
Diphosphines Ph2P[CH2]nPPh2(n= 1–4) form novel trans-carbonyl complexes of IrI of stoicheiometry[{Ir(CO)Cl(diphosphine)}m] in which the diphosphine (n= 1,3, or 4) bridges the metal atoms. Contrary to a previous postulate, the complex of Ph2P[CH2]2PPh2 is [Ir(CO){Ph2P(CH2)2PPh2}2][Ir(CO)2Cl2]. The diphosphine complexes of PdII and PtII, some of which are described for the first time, are each of cis geometry. In each case Ph2P[CH2]2PPh2 chelates the metal and the complex is mononuclear, but Ph2P[CH2]4PPh2 bridges metal atoms of trinuclesr complexes. The diphosphine Ph2P[CH2]3PPh2 chelates PdII but forms a bridaed complex of PtII. Bridging by a diphosphine ligand occurs when the angle PMP which would be sub-tended by a chelating ligand exceeds 90°.Keywords
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