Novel Chromium, Molybdenum, and Tungsten Complexes of 2-pyridylamidoxime

Abstract

Reaction of [Cr(CO) 6 ] with 2-pyridylamidoxime (PAO) in THFunder reduced pressure resulted in the formation of the tris derivative [Cr(PAO) 3 ]. The corresponding reaction in the presence of bipyridine gave the binuclear complex [Cr 2 O 4 (PAO)(bpy)]. On the other hand, reaction of [Mo(CO) 6 ] with 2-pyridylamidoxime in air resulted in the formation of [Mo 2 O 6 (PAO) 2 ], while in the presence of bipyridine, the reaction gave two isomers with molecular formula [Mo(CO) 4 (PAO)].bpy, where bpy form hydrogen bonds to the coordinated 2-pyridylamidoxime. Reactions of [W(CO) 6 ] with PAO ligand in air yielded the complex [W 2 O 6 (PAO) 2 ]. The structures of all complexes were characterized by elemental analyses, IR, and 1 H NMR spectroscopy. The thermal properties of the complexes were also studied.