Structural characterization of the coordination behavior of 4,4′-di-methoxy,2,2′-di-ol-benzophenone modified metal alkoxides
作者:Timothy J. Boyle、Leigh Anna M. Ottley
DOI:10.1016/j.ica.2010.08.047
日期:2010.12
Group 4 metal congeners: [(py)(OPri)2Ti(μ,μc-OBzP)]2 (1), ‘[(OBut)2Ti(μ-OBut)]2(μc2-OBzP)}n’ (2), [(ONep)2Ti(μ-ONep)]2(μc2-OBzP) (3), [(OBut)2Zr(μ-OBut)]2(μc2-OBzP) (4), [(MeIm)2(ONep)2Zr(μ,μc-OBzP)]2 (5), [(ONep)2Zr(μc2-OBzP)(μ-ONep)(μ3-O)Zr(ONep)]2 (5a), [(OBut)2Hf(μc2-OBzP)]2 (6), ‘[(ONep)2Hf(μ,μc-OBzP)]2·py}n’ (7), ‘[(OEt)3Nb(μ,μc-OBzP)]2}n’ (8), [(ONep)3Nb(μ,μc-OBzP)]2 (9), [(OEt)3Ta(μ,μc-OBzP)]2
摘要4,4'-二甲氧基,2,2'-二醇-二苯甲酮(H2-OBzP)配体与一系列早期过渡金属醇盐的配位行为(第4、5、5组)首次出现和6)确定采用“桥接,螯合桥接”(μ,μc-OBzP)或“双螯桥接”(μc2-OBzP)布置。发现主要产物为具有伪八面体(Oh)结合金属中心的二聚体。对于较大的阳离子(Hf,Nb和Ta)和最小的溶剂化(Ti / py),注意到μ,μc-OBzP模式,而对于较大的第4组金属同类物,观察到了μc2-OBzP配位:[[py (OPri)2Ti(μ,μc-OBzP)] 2(1),'[((OBut)2Ti(μ-OBut)] 2(μc2-OBzP)} n'(2),[(ONep)2Ti(μ -ONep)] 2(μc2-OBzP)(3),[(OBut)2Zr(μ-OBut)] 2(μc2-OBzP)(4),[(MeIm)2(ONep)2Zr(μ,μc-OBzP )] 2(5)