7 research outputs found
A new synthetic route to quadruply bonded tungsten-tungsten and molybdenum-tungsten compounds of the type MM'X4(PR3)4, X = Cl or Br. Structural characterization of quadruply bonded WWBr4(.mu.-dppm)2 and MoWBr4(PMe2Ph)4 and phosphorus-31{proton} NMR spectra of these and related compounds
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Preparation and Structure of Two Ditungsten Compounds Synthesized with the 3,5-Dichlorophenylformamidinate Ligand
No full textElectronic and Structural Variation among Copper(II) Complexes with Substituted Phenanthrolines
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Diosmium(III) Compounds Supported by 2-Anilinopyridinate and Novel Alkynyl Derivatives
No full textThe reaction between Os2(OAc)4Cl2 and Hap (Hap is 2-anilinopyridine) under prolonged refluxing conditions resulted in an OsIII 2 compound, Os2(ap)4Cl2 (1), that can be crystallized as either the cis-(2,2) isomer from a CH3OHâCH2Cl2 solution or the (3,1) isomer from a hexanesâCH2Cl2 solution. Compound 1 undergoes facile reactions with LiC2Y to yield a series of Os2(ap)4(C2Y)2 compounds with Y as Ph (2), ferrocenyl (3), SiMe3 (4), and C2SiMe3 (5). X-ray diffraction study of compound 2 reveals solvent-dependent isomerism similar to that of the parent compound 1. Compound 1 has OsâOs distances of 2.3937(8) and 2.3913(8) Ă
for the cis-(2,2) and (3,1) isomers, respectively, and is paramagnetic (S = 1). Both the ethynyl derivatives 2 â 4 and butadiynyl derivative 5 are diamagnetic and have OsâOs distances of 2.456(1), 2.471(1), and 2.481(1) Ă
for the cis-(2,2) and (3,1) isomers of 2 and (3,1) isomer of 4, respectively. Compounds 1â5 exhibit multiple one-electron redox couples in their cyclic voltammograms, including a reversible Os2(8+/7+) couple for 2. Resonance Raman spectra of both compounds 1 and 2 are reported
