Synthesis and reactions of new type carbyne compounds; crystal structure of the compounds [Br(CO) 2(C 5H 5N) 2MoCC 6H 5

Abstract

The compound [Br(CO) 4Mo(CC 6H 5)] reacted with pyridine in dichloromethane to give the pyridine-substituted molybdenumcarbyne compound [Mo(CC 6H 5) Br(CO) 2(Py) 2] ( 1), the structure of which was established by a single-crystal X-ray diffraction study. The molecular possesses mirror symmetry, defined by the atoms Br, Mo, C(2) and C(3). Compound 1 reacted with α,α′-dipyridine and Ph 2PCH 2CH 2PPh 2 (dppe) giving the carbyne compounds [Br(CO) 2(bipy)Mo(CC 6H 5)] ( 2) and [Br(CO) 2(dppe) Mo(CC 6H 5)] ( 3), respectively. From the reaction of 1 and 2 with [S 2Fe 2(CO) 6] 2− compounds, [L(CO) 2(C 6H 5C)MoSFe 2(CO) 6SMo(CC 6H 5) (CO) 2L] [( 4 L = (Py) 2; ( 5) L = bipy] were obtained. The structures of these new type carbyne compounds are suggested.