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作 者:黄华[1,2] 张振琴[1] 张勇[1] 姚英明[1]
机构地区:[1]苏州大学化学化工学院江苏省有机合成重点实验室,江苏苏州215123 [2]泰州师范高等专科学校,江苏泰州225300
出 处:《南京工业大学学报(自然科学版)》2008年第5期54-57,共4页Journal of Nanjing Tech University(Natural Science Edition)
基 金:国家自然科学基金资助项目(20472063)
摘 要:β-二亚胺基锂与无水YbCl3在四氢呋喃(THF)中按摩尔比为1∶1反应,可以高产率生成(β-二亚胺基)Yb-Li双核金属配合物LYbCl(μ-Cl)2Li(THF)2[L为{(C6H3-2,6-(CH3)2)NC(CH3)}2CH](1).配合物(1)经过元素分析、EDTA络合滴定、红外光谱分析等方法表征,并测定了其晶体结构,属于单斜晶系,C2/c空间群,a=3.317 9(3)nm,b=1.392 34(9)nm,c=2.071 9(2)nm,V=7.750(1)nm3,Z=8,Dc=1.449 mg/m3,R=0.045 8,wR=0.080 6.配合物(1)具有双金属结构,β-二亚胺基镱部分通过2个氯桥与Li+相连,Li+再与2个THF分子配位.Yb原子与β-二亚胺基上的2个N原子,3个Cl原子和1个THF上的O原子配位,形成一个八配位的扭曲的八面体结构.Reaction of the lithium j3-diketiminate LLi [ L is { ( C6H3-2,6-( CH3 }2 ) NC( CH3 ) 12CH] with equivalent mole of YbC13 in THF, after workup, gave the title complex LYbCl ( (-Cl) 2 Li (THF) 2 ( 1 ), and the crystal structure of the complex ( 1 ) was determined by single-crystal X-ray diffraction. The crystal belonged to monoclinic, space group C2/cwitha=3.3179(3), b= 1.39234(9), c=2.0719(2) nm, V=7.750(1) nm^3, Z= 8, Dc = 1. 449 mg/m^3, R = 0. 045 8, wR = 0. 0806. In the molecular structure of the title complex, β-diketiminate ytterbium moiety was bonded through two chloro bridges to a lithium cation, which in turn was bonded to two oxygen atoms of two THF molecules. The ytterbium ion displayed a distorted pseudo-octahedral geometry defined by the two nitrogen atoms of the chelating bidentate fl-diketiminate ligand, three chlorine atoms, and one oxygen atom from THF molecule.
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