Trans Phosphine Complexes of Platinum II Chloride

Submitted by CHAO-YANG HSU, BRIAN T. LESHNER, and MILTON ORCHIN Checked by MICHEL LAURENTt 

Heretofore, the most common method for the preparation of the useful platinum(II) complexes of the type [PtCl2L3], where L is a tertiary phosphine, consisted of the reaction between potassium tetrachloroplatinate(II) and tertiary phosphines.1 When trialkylphosphines are used, the reaction usually leads to a mixture of cis- and trans isomers,2 3 and when triaiylphosphines are employed4 only the cis isomers are obtained. The preparation of pure trans complexes by a simple, convenient procedure is highly desirable. 

The following procedures describe the direct preparations of fttzns-[PtCl2 P(C6H5)3 2] and trans-[PtClj [P(n-C4H9)3] 2] by the reaction between the appropriate tertiary phosphine and potassium trichlorofethylene)-platinate(II)  

Tris(ethylenediamine)ruthenium(II) and Tris(ethylenediamine)rutheniumflll) 117 

TRIS(ETHYLENEDIAMINE)RUTHENIUM(II) AND TRIS(ETHYLENEDIAMINE)RUTHENIUM(III) COMPLEXES 

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