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The X-ray crystal structure of Ti[Me2Si(η5-C5H4)2]S5 has been determined. The coordination about the titanium may be described as a distorted tetrahedron. The (centroid)? Ti? (centroid) angle is 129.2° and the S? Ti? S bond angle 96.1°. The cyclopentadienyl rings are linked by a dimethylsilyl bridge. The sixmembered ring TiS5 has a cyclohexane-like chair configuration. The four S? S distances range from 2.048 to 2.059 Å. Important structural dimensions are compared to those of similar type compounds. 相似文献
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The crystal structure of bis(η5-cyclopentadienyl)titana(TiIV)-thiacyclohexaselenane, Ti(η5-C5H5)2SSe4 ( 1 ), has been determined by X-ray diffraction data. ( 1 ) crystallizes in the monoclinic space group P21/c with four formula units in the unit cell. The cell dimensions are a = 13.179, b = 8.087, c = 14.447 Å, β = 114.857°. The six-membered heterocycle TiSSe4 has the expected chair conformation. In the chelate ring the Ti atom is S- and Se-bonded. The geometry of ( 1 ) corresponds closely to that of Ti(→5-C5H5)2Se5. 相似文献
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The crystal and molecular structure of Bis(η5-cyclopentadienyl)titanium(IV) dibromide, Ti(η5?C5H5)2Br2, has been investigated by an X-ray structure determination. Crystal data: triclinic, a = 7.872(5), b = 11.807(5), c = 12.310(3) Å, α = 107.62(3), β = 100.83(4), γ = 90.69(4)°, V = 1 068(14) Å3, T = 293, space group P1 , Z = 4 (there are two crystallographically independent molecules in the asymmetric unit cell and their conformations are similar). Final R and Rw values are 0.068 and 0.073, respectively. The structural results are compared to those for similar type molecules. 相似文献
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By the reaction of KCN with Cp2TiCl2 (Cp = η5-C5H5) in boiling methanol, bis(cyclopentadienyl)-methoxytitanium(IV) cyanide, Cp2Ti(OCH3)CN, is formed which in air is converted into the dinuclear oxygen-bridged derivative (Cp2TiCN)2O. By the same procedure, the bis(methylcyclopentadienyl) analogue [MeCp2TiCN]2O has been obtained. An X-ray diffraction study of (Cp2TiCN)2O has shown that the CN group acts as a unidentate ligand with a Ti? C bond length of 2.158 Å and a Ti? C? N bond angle of 177.7°, very close to linearity. The Ti? O bond distance, 1.836 Å, and the bond angle at the bridging O atom, 174.1°, are normal. The ligands are arranged in a nearly tetrahedral way around the Ti atoms. The structural results are compared to those for similar dinuclear titanium complexes. 相似文献
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Y. Wang Y. Yao Q. Shen K. Yu 《Acta Crystallographica. Section C, Structural Chemistry》1999,55(11):IUC9900159-IUC9900159
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