摘要:
The condensation reaction of CH3COC5H4M(CO)(3)SnCl3 (M = Mo or W) with PyCONHNH2 (Py = 2,3,4-pyridyl or 2-pyridylmethyl) in mild conditions yields cyclodiazastannoxides fused cyclopentadienyl M-Sn bonded organometallic heterocycle {mu-[C5H4(CH3)C=N-N=C(O)PyH]M(CO)(3)SnCl3}. The similar reaction of CH3COC5H4M(CO)(3)SnCl3 with ArCONHNH2 (Ar = 2-furanyl) gives complexes mu-[C5H4(CH3)C=N-N=C(O)Ar]M(CO)(3)SnCl2(H2O), in which the water molecule can be replaced by other N-donor ligands, such as pyridine or 4,4-bipyridine. Arene-bridged organometallic heterocyclic complexes mu-{[C5H4(CH3)C=N-N=C(O)](2)C6H4}{M(CO)(3)SnCl2(Solvent)}(2) have also been prepared by the reaction of CH3COC5H4M(CO)(3)SnCl3 with terephthaloyl hydrazine. In these new organometallic heterocyclic complexes, it seems that the tin atom prefers to be six-coordinate through absorbing the chloridion or solvent molecules. (c) 2005 Elsevier B.V. All rights reserved.