Rare η2-benzyne and benzylidene complexes of niobium have been synthesised from [Nb(C5R5)(NR′)Cl2](R = H, Me; R′= 2,6-Pri2C6H3)via intermediate diphenyl and dibenzyl species and their molecular structures have been determined: these complexes are analogues of well-established zirconocene derivatives.
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Cockcroft et al. (1992) studied this question.
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