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Synthesis and Characterization of Divalence Lanthanide Complexes Supported by Linked Bis(amidinate)s and Their Catalytic Properties

Author: LiuHaiDong
Tutor: ShenZuo
School: Suzhou University
Course: Organic Chemistry
Keywords: Bridging amidine Synthesis Structure Catalytic Rare earths
CLC: O627.3
Type: Master's thesis
Year: 2010
Downloads: 42
Quote: 0
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Abstract

This article Bridging amidine with body (L = [Me3SiNC (Ph) N (CH2) 3NC (Ph) NSiMe3]), synthesized a series of bridging amidine divalent and trivalent bi-metal, single-metal lanthanide complexes divalent rare-earth, and lithium oxide-containing clusters, these complexes have been a comprehensive analysis, including X-ray diffraction characterization. We investigated part of the complexes and bridged amidino lithium salt in the catalytic activity in the the catalytic amine with a nitrile amidine reaction. The main findings are as follows: a synthesis of the bridged bis guanyl lithium salt (1), the complexes after X-ray single crystal diffraction. Investigation the bridged bis amidino lithium salt as a catalyst for the amine with a nitrile guanylating reaction, its activity than bridged bis amidino group divalent ytterbium clusters low. 2 bridged bis amidino the lithium salt LLi2 LnI2 at a 1:1 molar ratio of the reaction, in the presence of lithium oxide obtained clusters containing lithium oxide [Li (DME) 3] 2 [{(EuI) 2 (μ2-I) 2 (μ3-L) 2 (Li) 4} (μ6-O)] 2 - (2) and [Li (TMEDA)] 2 [{(EUI) (μ2-I) 2 ( μ3-L) 2 (Li) 4} (μ6-O)] 2 - (3). These clusters after the X-ray single crystal diffraction, infrared spectroscopy and elemental analysis. 3 bridged bis amidino the lithium salt LLi2 EuCl3 1:1 molar ratio Reaction bridging amidino europium chloride LEuCl (THF), and then in the presence of lithium oxide and 1.15 equivalents of sodium potassium (9:1 ) alloy to a reduction reaction to obtain a double metal bridged bis amidino europium clusters containing lithium oxide [{Eu2 (μ2-Cl) 2 (μ3-L) 2 (Li) 4} (μ6-O)] (4 ), the compound after the X-ray single crystal diffraction, infrared spectroscopy and elemental analysis. 4 Bridging amidino the lithium salt LLi2 EuCl3 at a 1:1 molar ratio of the reaction has been bridged amidino the europium chloride LEuCl (TMEDA), (5) of the rare earth compound, after the X-ray single crystal diffraction, infrared spectroscopy, elemental analysis and characterization. 5 bridged bis amidino the lithium salt LLi2 YbCl3 EuCl3 at a 1:1 molar ratio reaction of its bridging amidino rare earth chlorides of YbCl (THF), LEuCl (THF), and then separating the crystals and 1.15 equivalents of sodium potassium (9:1) alloy to a reduction reaction to obtain a dual core bridging divalent the amidino europium compound (Leu) 2 (6) and ytterbium chloride as a bridge trinuclear divalent ytterbium compound LYbYbCl2YbL (8), Eu compound After the X-ray single crystal diffraction, infrared spectroscopy and elemental analysis. 6 Bridging amidino the lithium salt LLi2 EuCl3 2:1 molar ratio to obtain the bridging amidino trivalent europium compound, and then in the presence of lithium oxide and 1.15 equivalents of sodium potassium (9:1) alloy The reduction reaction to obtain the double anion of the bridged bis amidino europium compound L2EuLi2 (THF) 2 (7), the compound after the X-ray single crystal diffraction.

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