Syntheses of some transition-metal complexes containing the tripodal ligand HB(PriMeC3N2H)3 and the X-ray crystal structure of [Mo(No)-{HB(3-Pri-5-MeC3N2H)3}(OEt)2]

Abstract

The new complexes [M{HB(PrⁱMeC₃N₂H)₃}X](M = Tl, X = nothing; M = Ni or Co, X = NCS or NCO; M = Zn, X = NCS or N₃), [M{HB(PrⁱMeC₃N₂H)₃}₂](M = Fe, Co, Ni, or Zn), [Mo{HB(PrⁱMeC₃N₂H)₃}{η³-CH₂C(Me)CH₂}(CO)₂], and [Mo(NO){HB(PrⁱMeC₃N₂H)₃}X(Y)](X = Y = CO, I, OMe, or OEt; X = I, Y = OMe or OEt) have been synthesised. The compounds [Mo(NO){HB(PrⁱMeC₃N₂H)₃}X(Y)](X = Y = CO or I; X = I, Y = OMe or OEt); were isolated as a mixture of at least two isomers. A single-crystal X-ray diffraction study of [Mo(NO){HB(PrⁱMeC₃N₂H)₃}(OEt)₂] shows that the molybdenum atom is in an approximately octahedral co-ordination environment. The bulky Prⁱ groups on the tripodal ligand are all in the 3 position closest to the ethoxide ligands with Mo–O distances of 1.86(1) and 1.91(1)Å and Mo–O–C(Et) angles both of 129(1)°.