Dalibor Dastych

Ni(II)-piperidinedithiocarbamate complexes with bidentate phosphorus-donor ligands

Abstract Nickel(II) piperidinedithiocarbamate complexes of the composition [Ni(pipdtc)(P-P)]X and [Ni2(pipdtc)2(NCS)2(dpph)] (X=NCS, ClO4, I; P-P=1,2-bis(diphenylphosphino)ethane (dppe), 1,4-bis(diphenylphosphino)butane (dppb), 1,6-bis(diphenylphosphino)hexane (dpph), 1,4-bis(diphenylphosphino)ferrocene (dppf); pip=C5H10; dtc=S2CN−) have been synthesized. The compounds have been characterized by elemental analyses, IR, electron and 1H, 13C{1H} and 31P{1H} NMR spectroscopies, thermal analysis, magneto-chemical and conductivity measurements. A single-crystal X-ray analysis of the [Ni(pipdtc)(dppf)]ClO4 complex proved four-coordinated nickel in a deformed square-planar arrangement with a S2P2 donor set.

The synthesis and characterization of N-(diphenylthiophosphinyl)-P-phenyl-thiophosphonamidic acid phenyl ester and related compounds chiral at phosphorus

The synthesis and spectroscopic characterization of three novel phosphorus(V) compounds, chiral at phosphorus, are reported. All three compounds were characterized by X-ray crystallography, and for one compound a 1H-31P HETCOR experiment was performed.

Di-μ-chlorido-bis-[diacetonitrile-chlorido-oxidovanadium(IV)].

The title compound, [V2Cl4O2(CH3CN)4], is a centrosymmetric dinuclear VIV complex associated with four molecules of acetonitrile. The coordination around both VIV atoms is essentially square-planar, involving three Cl atoms and one O atom [maximum deviation = 0.017 (3) Å for the O atom]. The augmented octahedral coordination of the metal atom is completed by the N atoms of acetonitrile ligands. The VIV atoms are linked by two Cl atoms, acting as bridging atoms. The crystal studied was a non-merohedral twin with a ratio of the two twin components of 0.8200 (3):0.1800 (3). Although Cl and O atoms are present as potential acceptors in the title compound, no hydrogen bonds were observed in the crystal structure.