Issue 5, 1984
From the journal:

Journal of the Chemical Society, Dalton Transactions

Reactions of platinum(II) acetylides with organolithium compounds: formation of lithium-bridged dinuclear platinum(II) complexes and of triorganoplatinate(II) complexes: crystal structure of the complex [Pt2(C[triple bond, length half m-dash]CPh)4(PEt3)2(Bun)2(µ-Li)2]

Angelika Sebald,   Bernd Wrackmeyer,   Charis R. Theocharis  and  William Jones  

Abstract

Platinum(II) acetylides of the type trans-[Pt(C[triple bond, length half m-dash]CR1)2(PEt3)2](1)(R1= Me, Bun, or Ph) lose one equivalent of PEt3 on treatment with organolithium reagents LiR2(2)(R2= Bun, But, or Ph) in hydrocarbon solvents to give the dinuclear complexes [Pt2(C[triple bond, length half m-dash]CR1)4(PEt3)2(R2)2(µ-Li)2](3), containing a PtLi2Pt unit. In the presence of better donors (e.g. Et2O, tetrahydrofuran, or NNN′N′-tetramethylethylenediamine) solvation of lithium breaks this dimeric structure leading to the anions (4) of the type trans-[Pt(C[triple bond, length half m-dash]CR1)2(PEt3)R2]–. Reaction of the anion (4d)(R1= Ph, R2= Bun) with a further equivalent of LiR2(R2= Bun) gave Li(C[triple bond, length half m-dash]CPh) and another anion, cis-[Pt(C[triple bond, length half m-dash]CPh)(PEt3)(Bun)2]–. Multinuclear n.m.r. (1H, 7Li, 13C, 31P, and 195Pt) has been used to characterize the highly reactive compounds in solution. The crystal structure of complex (3d)(R1= Ph, R2= Bun) has been determined, which crystallises in space group P21/n, with a= 14.061(4), b= 18.408(4), c= 19.737(7)Å, and Z= 4.

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Article information

DOI
https://doi.org/10.1039/DT9840000747
Article type
Paper

J. Chem. Soc., Dalton Trans., 1984, 747-756

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Reactions of platinum(II) acetylides with organolithium compounds: formation of lithium-bridged dinuclear platinum(II) complexes and of triorganoplatinate(II) complexes: crystal structure of the complex [Pt2(C[triple bond, length half m-dash]CPh)4(PEt3)2(Bun)2(µ-Li)2]

A. Sebald, B. Wrackmeyer, C. R. Theocharis and W. Jones, J. Chem. Soc., Dalton Trans., 1984, 747 DOI: 10.1039/DT9840000747

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