Abstract
Reaction of [(PPh 3) 2Pt(C 2H 4)] with 5,6-dimethyl-2,1,3-benzothiadiazole affords [ P t 2 S { N ( 6 − μ − N ︹ − 4 , 5 − M e 2 C 6 H 2 ) } ( μ − P P h 2 ) ( P P h 3 ) 2 P h ] . A crystal structure determination shows that one of the Pt-atoms is inserted into one of the N S bonds. The two Pt-atoms are bridged by the amino groups produced by this insertion, and by a diphenylphosphido group which is formed by insertion of the other Pt-atom into a P C bond. The bond distances in the six-membered heterocyclic P t S N C C − μ − N ︹ ring indicate an extensive electron delocalization. The 31P-NMR spectrum reveals a large upfield shift for the bridging diphenylphosphido group, which is consistent with its presence in a four-membered ring.
Published Version
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