Synthesis,structure and properties of the mixed-ligand tungsten(II) complex [WBr2(CO)3(tmpymt)] (tmpymt = 1,4,6-trimethylpyrimidine-2-thione) |
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| Authors: | Viviane A.S. Falcomer Sebastião S. Lemos José R.S. Politi Gleison A. Casagrande Ernesto S. Lang Robert A. Burrow |
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| Affiliation: | 1. Instituto de Química, Universidade de Brasília, 70910-900 Brasília, DF, Brazil;2. Faculdade de Ciências Exatas e Tecnologia, Universidade Federal da Grande Dourados, 79804-970 Dourados, MS, Brazil;3. Departamento de Química, Universidade Federal de Santa Maria, 97105-900 Santa Maria, RS, Brazil |
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| Abstract: | The reaction of [{WBr(CO)4}2(μ-Br)2]2 1 with 1,4,6-trimethylpyrimidine-2-thione (tmpymt) affords the air-sensitive complex [WBr2(CO)3(tmpymt)] 2. The X-ray structure of 2·C3H6O reveals that the geometry surrounding the tungsten(II) atom is best described as a distorted capped trigonal prism with a bromine atom Br(1) in the unique capping position. The other bromine atom Br(2), the (N,S)-chelate and one carbonyl C(41) occupy the capped quadrilateral face. The complex has been additionally characterized by IR and NMR spectroscopy. The optimized molecular structure (RHF/LanL2DZ) supports the experimental data. |
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