Abstract
The complexes trans-[ReCl(CNR)(dppe)2](1, R = Me or But) have been prepared by replacement of dinitrogen in trans-[ReCl(N2)(dppe)2]. The alkyl isocyanide ligands in complexes (1) undergo electrophilic attack at the nitrogen atom by mineral acid (HBF4), forming the carbyne complexes trans-[ReCl(CNHR)(dppe)2][BF4](2, R = Me or But) and spectroscopic data for these complexes are given.The X-ray structure of trans-[ReCl(CNHMe)(dppe)2][BF4] has been determined and shows that the CNMe angle is 123(2)°, the Re–C (carbyne) bond length is 1.80(3)A, and the C(carbyne)–N bond length is 1.35(3)A.
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