F. Iwasaki et al., STRUCTURES AND REACTION-MECHANISM OF NOVEL METAL-CARBENE COMPLEXES DERIVED FROM HYPERVALENT DIAZADISELENATHIAPENTALENES, Phosphorus, sulfur and silicon and the related elements, 120, 1997, pp. 429-430
Novel metal-carbene complexes (4) with a metallapentalene framework ha
ve been obtained from hypervalent diazadiselenathiapentalenes (3) by t
reating with Pt(PPh3)4, Pd(PPh3)4 and RhCl(PPh3)3. X-Ray investigation
s revealed that the central hypervalent sulfur atom in 3 was substitut
ed by a metal atom to form M-Se bonds in the resultant metallapentalen
e framework.