Carbyne complexes chelation

In this review, well-defined metal-containing PAEs are described whose primary structure is represented by one of the schematic drawings A-C and E shown in Fig. 2. In contrast to the structures shown in the A-C systems, E has a conjugated phenyleneethynylene with metal chelates as end groups. PAEs containing metal complex as side groups (D) have, up to now, not been described in the literature. The classes of compounds such as metal-bridged alkynes, the poly(metallayne)s, and polymer carbyne complexes (structures G and H) do not in fact represent PAEs. 

Reaction of [CpCr(CO)3] Na+ with S3N3CI3 (/.e., trithiazyl trichloride) affords both [CpGr(CO)a(NS)] and [ CpCr(CO)a 2S], whose crystal structures have been determined. Rates of displacement of halide from alkyl halides by [CpMo(CO)3]" are sensitive to steric, leaving-group, and counter-ion effects. Attachment of the Gp ligand in [CpMo(CO)3]H to polystyrene has little effect upon the Bronsted acidity of the complex. The chemistry of bis-alkyne complexes of Mo and W of the types [CpM( -hfb)aCl] and [CpM(CO)( -but-2-yne)2]+[PF6] has been further explored. Reactions of the carbyne complex [CpW(CO)a(CAr)] (Ar=p-tolyl) with chelating bisphosphines afford [Pg.288]

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