Oxime and hydroxylamine derivatives of metals and metalloids

Modification of Titanium Isopropoxide with Aromatic Aldoximes

“…This allowed higher reaction temperatures. Ti 2 (OiPr) 3 (o-anisaldoximate) 5 (4, Figure 8) crystallized from a concentrated solution. The increased temperature can be taken into account for the higher degree of substitution.…”

“…[2] Several alkoxide derivatives Ti(OR) 4-x (ON=CRЈRЈЈ) x (x = 1-4) have been reported, but they were only characterized by infrared spectroscopy and elemental analysis. [3] The first structural analysis of a titanium oximate derivative, with side-on coordinated oximate ligand, was carried out by Thewalt et al for [Cp 2 Ti(H 2 O)(ON=CRЈRЈЈ)] + . [4] More recently, reaction of Ti(OiPr) 4 with salicylaldoxime resulted in a trinuclear complex in which the oximate groups, as dianionic ligands, bridge the three titanium centers.…”

“…Two isomers were observed (Figure 1), which differ by the mutual orientation of the side-on coordinated oximate ligands. In "iso-573 higher when o-or p-anisaldoxime were employed in the same molar ratio, and dimeric Ti 2 (OiPr) 3 (o-anisaldoximate) 5 with a bridging oximate ligand and monomeric Ti(oximate) 4 (oximate = o-anisaldoximate or p-anisaldoximate) were obtained. Dissolution of the p-anisaldoximate derivative upon heating in [D 6 ]DMSO led to deoximation reactions.…”

Complexation of Titanium n-butoxide Ti(OBun)4 and Zirconium n-butoxide Zr(OBun)4 with Some Oxime Ligands and Structural Analysis of the Complexes

“…Mehrotra et al [11] and Singh et al [12] prepared oxime complexes of some metal alkoxides such as alkoxides of Al, Si, Ge, Sn, Ti, Zr, As, Sb,V, Nb and Ta. The reactions were generally carried out in inert solvents like benzene and the liberated alcohol (usually ethanol or isopropanol) was fractionated off azeotropically.…”

“…Mehrotra et al [11] and Singh et al [12,13] noticed that reactions of alkoxides of Ti, Zr, V, Nb and Ta with oximes and diethylhydroxylamine are quite facile so that in the case of Ti and V, mono and di-substituted products were isolated, even at room temperature. The reaction of metal alkoxides with a wide range of oximes provides a convenient and versatile route for the synthesis of a variety of interesting homo-and heteroleptic oxime derivatives.…”