ChemInform Abstract: Chemistry of Polynuclear Metal Complexes with Bridging Carbene or Carbyne Ligands. Part 58. Some Reactions of the Compounds (MW(μ-CC6H4Me-4)(CO)3(η5-C9H7)(η5-C2B9H9Me2)) (M: Mo or W); Crystal Structures of the Complexes (W2(μ-CC6H4Me-4)(CO)2(L)(η5-C9H7)(η5-C2B9H9Me2)) (L: N2C(C6H4Me-4)2 or O).

ChemInform Abstract

The compounds (I) react with the diazoalkanes (II) to afford the complexes (IIIa)-(IIId). The compounds (IIIe) and (IIIf) are prepared by treating (Ib) with aqueous H₂O₂ and tolylazide (IV), respectively. The molecular structures of the compounds (IIIb) (space group P1, Z=2) and (IIIe) (P2₁/c, Z=4) are determined by X-ray analysis. The ¹H, 13C(1H) and 11B(1H) NMR spectra of all the new compounds are reported. The results establish that all the reactions produce 34 valence electron dimetal complexes which retain the B-H-M bridge system.