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Reaction of the tetrasulphidomolybdenum(IV) complex LMo(NCS)(S4) with dicarbomethoxyacetylene: X-ray structure of LMo(NCS){S2C2(CO2Me)2} [L = hydrotris(3,5-dimethylpyrazolyl)borate] |
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| Authors: | Aston A. Eagle Charles G. Young |
| Affiliation: | Department of Chemistry, La Trobe University, Bundoora, Victoria 3083, Australia Department of Physical and Inorganic Chemistry, University of Adelaide, Adelaide, South Australia 5000, Australia |
| Abstract: | The reaction of {HB(Me2pz)3}Mo(NCS)(S4) [HB(Me2pz)3− = hydrotris(3,5-dimethylpyrazolyl)borate anion] with dicarbomethoxyacetylene in refluxing toluene results in the formation of the brown, diamagnetic complex {HB(Me2pz)3}Mo(NCS){S2C2(CO2Me)2} (1) (the reactants above also yield 1 upon prolonged reaction in dichloromethane at 25°C), which has been characterized by X-ray crystallography. The mononuclear pseudo-octahedral complex contains a facially tridentate HB(Me2pz)3− ligand, a monodentate N-bound NCS− ligand, and a bidentate S2C2(CO2Me)22− ligand having a near planar MoS2C4 fragment and a SC=CS bond distance of 1.342(15) Å. Solutions of 1 are unstable in air and decompose to produce {HB(Me2pz)3}MoO2(NCS) and {HB(Me2pz)3}MoO(NCS)2. |
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