Detail Syntheses, structures and reactivities of novel cyclopentadienyl-amido and 1-azaallyl metal complexes Bibliografi Author: Cheng, Hui ; Leung, Kevin W. -P. (Advisor) Topik: CHEMISTRY; INORGANIC Bahasa: (EN )    ISBN: 0-599-69297-9     Penerbit: CHINESE UNIVERSITY OF HONG KONG (PEOPLE'S REPUBLIC OF CHINA)     Tahun Terbit: 2000     Jenis: Theses - Dissertation Fulltext: 9964826.pdf (0.0B; 0 download) Abstract The work presented in this thesis consists of three parts: (i) synthesis, structural characterization and reactivity study of group 4 metal complexes containing cyclopentadienyl-amido ligands and 1-azaallyl ligands, (ii) synthesis, structural characterization and reactivity study of organolanthanide complexes containing 1-azaallyl ligands, and (iii) synthesis and structural characterization of divalent tin organometallic compounds containing 1-azaallyl ligands. 62 compounds have been synthesized, 37 of which have been structurally characterized by X-ray analysis. The titanium dichloro compounds containing the cyclopentadienyl-amido ligands have been prepared via amine elimination of the neutral ligands with Ti(NMe2)4, followed by chlorination with Me3SiCl. The dicholo compound reacts with LiMe to form the dimethyl one. The amine elimination between the ligands with Zr(NMe2)4 leads to the ansa-metallocene. The phenyl- or pyridyl-linked 1-azaallyl alkali metal compounds react with ZrCl4 to give the zirconium dichloro compounds by the salt-elimination. One of them has proven to be an excellent precursor for the synthesis of a variety of alkyl derivatives. Treatment of the 1-azaallyl alkali metal compounds with one, two or four equivalents of anhydrous LnCl3 yields the chloro-bridged or “ate” compounds containing one or two 1-azaallyl ligands. The reactions of 1-azaallyl alkali metal compounds with SnCl2 afford different types of products. For example, a zwitterionic type tin(II) compound, a rearranged indenyl tin(II) compound, a substituted indene, and a novel stannene which contains a tin-tin bond have been obtained. The catalytic activities of some group 4 metal and lanthanide compounds synthesized in this work in ethylene polymerization with the presence of methylaluminoxane (MAO) have been investigated. Opini Anda Klik untuk menuliskan opini Anda tentang koleksi ini! Lihat Sejarah Pengadaan  Konversi Metadata   Kembali

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