Synthesis and structural study of an unsymmetrical aliphatic benzamidinato ligand and its use in the formation of selected Cu(i), Mg(ii) and Zr(iv) complexes†,10.1039/C2RA20709E

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Lactoyl-CoA 全氟丁基戊烷白叶藤碱全氟己基辛烷新白叶藤碱壳寡糖特色专题-生物多肽

Synthesis and structural study of an unsymmetrical aliphatic benzamidinato ligand and its use in the formation of selected Cu(i), Mg(ii) and Zr(iv) complexes†

Mei Fan,Qiaokun Yang,Hongbo Tong,Shifang Yuan,Bin Jia,Donglong Guo,Meisu Zhou,Diansheng Liu

RSC Advances Pub Date : 05/17/2012 00:00:00 , DOI:10.1039/C2RA20709E

Abstract

The reaction of a Et₂O solution of LiN(Cy)SiMe₃ (Cy = cyclohexyl) with PhCN in the presence of the Lewis-base donor tetrahydrofuran (THF) or Me₂N(CH₂)₂NMe₂ (TMEDA) gave the THF- or TMEDA-solvated unsymmetrical aliphatic lithium benzamidinato compound [{PhC(NCy)(NSiMe₃)}Li(THF)]₂ (1) or [{PhC(NCy)(NSiMe₃)}Li(TMEDA)] (2). Treatment of LiN(Cy)SiMe₃ with PhCN in diethyl ether, and further with CuCl, MgBr₂(THF)₂ or ZrCl₄ at a ratio of 1 : 1, 2 : 1 and 3 : 1 allowed the formation of novel metal complexes [{PhC(NCy)(NSiMe₃)}Cu]₂ (3), [{PhC(NCy)(NSiMe₃)}₂Mg(OEt₂)] (4) and [{PhC(NCy)(NSiMe₃)}₃ZrCl] (5), respectively. The X-ray structures of complexes 1–4 are presented. Complex 5/MAO system allows the moderate polymerization of ethylene.