Molecular and intracomplex dioxomolybdenum(VI) compounds with o-hydroxyazomethines, derivatives of salicylaldehydes and 2-furfurylamine: Crystal structures of 3-methoxysalicylidene-2-furfurylamine (HL2) and the binuclear complex [{MoO2(L2)(MeOH)}2(μ-O)]

Abstract

The crystal structures of methoxysalicylidene-2-furfurylamine (HL²) and the related binuclear complex [{MoO₂(L²)(MeOH)}₂(μ-O)] (I) have been determined by single-crystal X-ray diffraction. In complex I, which lies on a crystallographic twofold axis passing through the bridging oxo ligand O(4), the Mo atom has a distorted octahedral coordination (facial isomer) with two terminal oxygen atoms (O(3), O(6)) and the bridging oxo ligand, the O(7) and N(1) atoms of the bidentate chelating ligand (L²)^–, and the O(5) atom of the monodentate methoxy ligand. In the HL² molecule, the intramolecular hydrogen bond O–Н•••N closes the six-membered H-ring HOC₃N.