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Contributions to the Chemistry of Phosphorus. 227. HP4º as a Complex Ligand: Formation and Properties of [(η5-C5H5)2ZrCl(P4H)], [(η5-C5Me5)2ZrCl(P4H)], and [(η5-C5H5)3Zr(P4H)] The novel complexes [(η5-C5H5)2ZrCl(P4H)] ( 1 ), [(η5-C5Me5)2ZrCl(P4H)] ( 2 ), and [(η5-C5H5)3Zr(P4H)] ( 3 ) have been obtained by reaction of a solution of (Na/K)HP4 with the zirconocen derivatives [(η5-C5H5)2ZrCl2], [(η5-C5Me5)2ZrCl2], and [(η5-C5H5)3(η1-C5 H5)Zr] under suitable conditions. The structure of the compounds 1 – 3 , which are only stable in solution, has been elucidated by means of 31P-NMR spectroscopy. It is highly probable that the exo,endo isomer exists in each case. In addition, further isomers of lower relative abundancies have been observed, in which the ligands presumably exhibit a different spatial orientation relatively to each other. 相似文献
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The 1,1′-ring-substituted vanadocene dichlorides [V(η5-C5H4R)2Cl2] (R = CMe3, SiMe3, SiEt3) have been prepared from VCl4 and the appropriate lithiated cyclopentadiene, C5H4RLi, in 1 : 2 ratios. All complexes were characterized by elemental microanalysis and IR spectroscopy. The crystal structures of [V(η5-C5H4SiMe3)2Cl2] 3 and the parent compound [V(η5-C5H5)2Cl2] 1 have been determined by X-ray diffraction and are in accordance with expectations. Compound 1 crystallizes with two crystallographically independent molecules in its monoclinic unit cell. These two molecules are quite similar in their essential structural features. Compound 3 crystallizes in the triclinic space group P1 . The trimethylsilylcyclopentadienyl rings are bound in a staggered relative orientation. 相似文献
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