A binuclear molybdenum oxyfluoride: μ-oxido-bis[(2,2′-bipyridyl)fluoridodioxidomolybdenum(VI)]

Abstract

The title compound, [Mo2F2O5(C10H8N2)2], is a centrosymmetric binuclear molybdenum(VI) species with the metal atoms in a distorted octa­hedral environment. The coordination geometries of the symmetry-equivalent molybdenum sites are defined by the cis-terminal oxide groups and the N-atom donors of the bipyridyl ligand in the equatorial plane with axial F and bridging O atoms. The bridging O atom occupies a center of symmetry. The mol­ecules stack in the a-axis direction, and the crystal packing is stabilized by weak intra- and inter­molecular C—H⋯O and C—H⋯F hydrogen bonds.

Medium and high oxidation state metal/non-metal fluoride and oxide–fluoride complexes with neutral donor ligands

“…222 The structure of the dinuclear [{MoO 2 F(2,2 0bipy)} 2 (m-O)] is also known. 221 The less studied [WO 2 F 2 (L) 2 ] (L = dmso, OPPh 3 , OPMe 3 ) are made by similar methods to the molybdenum analogues À either addition of L to a solution of ''tungstic acid'' (WO 3 ÁnH 2 O) in aqueous HF, or from [WO 2 Cl 2 (L) 2 ] and Me 3 SnF. 214,216,223 The [WO 2 F 2 (LÀL)] (LÀL = 2,2 0 -bipy or 1,10-phen) can be obtained by prolonged reflux of the chloro-complexes with Me 3 SnF in CH 2 Cl 2 , 214 and the structure of [WO 2 F 2 (2,2 0 -bipy)] obtained adventitiously by decomposition of [WOF 4 (2,2 0 -bipy)] has been determined.…”

“Fluoride molecular scissors”: A rational construction of new Mo(VI) oxofluorido/1,2,4-triazole MOFs

“…Two separate peaks at 775 and According to the X-ray crystal structure data [17,20], these coordination environments represent a distorted octahedra [MoN 2 O 3 F] (Fig. 1), with two short cis-terminal "molybdenyl" bonds (Mo=O 1.6964 (15) [18], the present coordination polyhedra are much more distorted. The Mo atoms are substantially shifted towards the edge of the octahedra constituted by the "molybdenyl" oxygen atoms (ca.…”