Dioxidomolybdenum(VI) complex derived from malonoyldihydrazones: Synthesis, characterization, and crystal structure

In this paper, we report the synthesis, characterization, and molecular structure of the dioxidomolybdenum (VI) complex [MoO2(H2L)(H2O)]. The complex was obtained by reaction of malanoyldihydrazones ligand bis(2-hydroxy-1-naphthaldehyde) malonoyldihydrazone (H4L) with molybdenum bis(acetylacetonato)dioxomolybdenum(VI) in a 1:1 molar ratio in methanol. The complex was characterized by using various spectroscopic studies, such as IR, MS, and NMR. The structure of the complex was established by single-crystal X-ray crystallography. The complex crystallizes in the monoclinic space group P2(1)/c. The metal center has distorted octahedral coordination environments, connected to one azomethine nitrogen atom of H4L, two terminal oxido groups, two oxygen atoms of H4L, and one oxygen atom of a coordinated water molecule.