(η-Cyclopentadienyl)imido derivatives of molybdenum and tungsten
Abstract
The new paramagnetic compounds [M(η-C5H4R)X2(NR′)](M = Mo, X = Cl, R′= But, R = H, Me or Pri., M = Mo, X = Cl, R = H, R′= Pri, Prn or Ph; M = Mo, X = Cl, R = Me, R′= Ph; M = Mo, X = Br, R = Me, R′= But; M = W, X = Cl, R′= But, R = H or Me) have been prepared and the crystal structure of [Mo(η-C5H5)Cl2(NBut)] has been determined. The new diamagnetic molybdenum(IV) compounds of general formula [Mo(η-C5H4R)Cl(L)(NR′)] where L = ethene, propene, styrene, but-2-yne or carbon monoxide have been synthesised. The mercury-bridged compounds [{Mo(η-C5H4R)(C2H4)(NBut)}2(µ-Hg)](R = H or Me) have also been obtained, together with the compound [Mo(NBut)Cl2(PMe3)3]. The crystal structures of [Mo(η-C5H4Me)Cl(C2H4)(NBut)], [(Mo(η-C5H5)-(C2H4)(NBut)}2(µ-Hg)] and [Mo(NButCl2(PMe3)3] have been determined.