Abstract
trans-I(CO) 2L 2WCNEt 2 complexes (L 2 2,2′-bipyridyl (2,2′-bipy); 1,10-phenanthroline (ophen)) react with PR 3 (R Me, Et) and thus undergo substitution of the iodine ligand by the phosphine to yield the new, thermostable, cationic carbyne complexes, [(PR 3)(CO) 2L 2WCNEt 2] + I −. The ionic character of the compounds has been established from electrical conductivity studies of their solutions. Spectroscopic investigations of the complexes, whose composition has been determined by elemental analysis, indicate that in this reaction the halogen ligand in the trans position has been displaced by the chelate ligand, while the phosphine ligand occupies a cis coordination site, relative to carbyne moiety.
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