Preparation, characterization, and crystal structure of the adducts WOF4.nC5H5N (n = 1, 2)

2,2′-Bipyridyl adducts of tungsten oxide fluorides: preparation and characterization of WOF4•bipy and WO2F2•bipy; crystal structure of WO2F2•bipy

“…bipy. Such a stabilization through reduction of the coordination number has already been observed (1) for the adduct of WOF4 with the monodentate ligand pyridine. However, this effect is probably limited to the oxide fluoride derivatives since the coordination number of the tungsten atom in WF6.…”

Synthesis, Characterization, and Computational Study of WSF4·NC5H5

“…The optimized geometry of WSF 4 ·NC 5 H 5 adopts C 2v point symmetry and the geometric parameters are listed in Table 3. [5,7] were used for attempted geometry optimizations. During the optimization process, however, the second NC 5 H 5 molecule dissociated from the WSF 4 , corroborating the failure to observe the WSF 4 ·2NC 5 H 5 adduct by lowtemperature 19 F NMR spectroscopy.…”

“…[1,2] Recently, a facile synthetic route to pure WSF 4 has been developed in our laboratory, [2] rendering possible the investigation of its chemistry. Although no systematic study has looked at the fluoride-ion acceptor properties of WSF 4 , the Lewis acidity of WSF 4 towards fluoride ions has been documented by the NMR spectroscopic observation of the WSF 5 anion [3] and the crystal structure of [(Ph 3 P) 2 N][WSF 5 ]·CH 3 CN. [4] The Lewis-acid behaviour of WSF 4 towards nitrogen bases has only been documented by the formation of the WSF 4 ·CH 3 CN adduct.…”

“…[4] The Lewis-acid behaviour of WSF 4 towards nitrogen bases has only been documented by the formation of the WSF 4 ·CH 3 CN adduct. [1,2] In contrast to its oxide analogue, WOF 4 , [5] Lewis-acid-base adducts with nitrogen bases having sp 2 hybridized nitrogen atoms, such as pyridine, are unknown prior to this study.…”

Synthesis and Characterisation of WVI Complexes of Phosphane Oxide Ligands, [WO2X2(OPR3)2] (X = F, Cl or Br; R = Me or Ph), and of the [MoO2F2(OPR3)2]

“…[19] The Sn-C bonds are not significantly different between the parent [20] The compound has been reported several times before [21] 6 or WOF 4 adducts. [23] As a further test of this method, the [WO 2 Cl 2 (L-L)] (L-L = 2,2Ј-bipy, 1,10-phen), originally obtained from WO 2 Cl 2 and the molten diimines, [9a] were prepared from WCl 6 / (Me 3 Si) 2 O and the appropriate diimine, and then fluorinated with Me 3 SnF, in these cases under reflux for 48 h, due to the poor solubility of reagents and products. The [WO 2 F 2 (L-L)] are poorly soluble, white powders (Table 1), with the data in good agreement with those reported [12] [24a] and a 1:1 CH 2 Cl 2 solvate.…”