Dichlorodibenzonitrile platinum

With increasing steric hindrance and aromaticity, the rate of the reaction of the trialkylphenylphospholes (17a-c) with dichlorodibenzonitrile platinum decreased, but due to the electron-releasing ability of the trialkylphenyl ring, the complexation took place in all cases on the P-center. 

The 3-phosphinoyl-l-phenyl-l,2,3,6-tetrahydrophosphinine oxide (45) and the 3-phosphinoyl-l-phenyl-1,2,3,4,5,6-hexahydrophosphinine oxide (48) were converted to the corresponding c/s-chelate Pt complexes 47 and 50, respectively, after double deoxygenation followed by complexation by dichlorodibenzonitrile platinum (Scheme 16) [65,66]. 

Bis(phosphinoylmethyl)ainines (58) are useful precursors of bidentate P-ligands (59) obtained after double deoxy-genabon by silanes, e.g., trichlorosilane that could be used for the synthesis of ring platinum complexes (60) by reaction with dichlorodibenzonitrile platinum (Scheme 22) [75-78]. Ring Pt complexes are special heterocycles that may be regarded potential catalysts in homogeneous catalysis. 

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