名称:
Reactivity of molybdenum complexes containing mixed NHNPhR and NNPhR hydrazido ligands (R=Ph, Me) toward di-imines. X-ray crystal structures of [MoO(NNPh2)Cl2(bpy)]·CH2Cl2, [MoO(NNPh2)Cl2(phen)]·CH2Cl2 and [Mo(NNPh2)2Cl2(phen)]
摘要:
Complexes of the type [Mo(NHNPhR)(NNPhR)(acac)Cl-2] (R=Ph (I); Me (II)) react in dichloromethane with the di-imines 2,2'-bipyridine (bpy) and 1,10-phenanthroline (phen) to yield, after slow evaporation under air of the solvent, the species [MoO(NNPhR)Cl-2(bpy)](R=Ph(III); Me (IV)) and [MoO(NNPhR)Cl-2(phen)] (R=Ph (V); Me (VI)). When these reactions are carried out in toluene under inert atmosphere, I and II give the bis-hydrazido(2-) complexes [Mo(NNPhR)(2)Cl-2(bpy)] (R=Ph (VII); Me (VIII)) and [Mo(NNPhR)(2)Cl-2(phen)] (R=Ph (IX); Me (X)). The crystal structures of III, V and IX are reported, Crystals of III are orthorhombic, space group Pbca, with cell parameters a=15.290(6), b=16.225(8), c=19.954(9) Angstrom, Z=8, R=0.036 and R(w)=0.044, Crystals of V are triclinic, space group <(P)over bar 1>, with a=8.935(1), b=12.960(2),c=13.443(2) Angstrom, alpha=61.84(1), beta=74.75(1), gamma=86.96(1)degrees, Z=2, R=0.036 and R(w)=0.044, Crystals of IX are triclinic, space group <(P)over bar 1>, with a=9.812(4),b=10.459(4),c=17.979(7) Angstrom,alpha=73.69(3), beta=77.98(3), gamma=66.30(3)degrees, Z=2, R=0.038 and R(w)=0.043. All complexes display similar pseudooctahedral geometries with the hydrazido(2-) ligands adopting the nearly linear coordination mode.