Crystal structure and spectral characterization of hexanuclear oxo titanium(IV) clusters: [Ti6O6(OSi(CH3)3)6(OOCR)6] (R=But, CH2But, C(CH3)2Et)
作者:P. Piszczek、M. Richert、A. Wojtczak
DOI:10.1016/j.poly.2007.10.018
日期:2008.2
Hexanuclear oxo titanium(IV) siloxo carboxylate complexes with the general formula [Ti6O6(OSi(CH3)3)6(OOCR)6] (R = But (1), CH2But (2), C(CH3)2Et (3)) were synthesized in quantitative yield, by the reaction of Ti(OSiMe3)4 with the appropriate organic acid. Crystal structure determination revealed that molecules of 1–3 are composed of [Ti6-(μ3-O)6] cores stabilized by six syn–syn carboxylato bridges
具有通式[Ti 6 O 6(OSi(CH 3)3)6(OOCR)6 ]的六核含氧钛(IV)硅氧烷羧酸盐配合物(R = Bu t(1),CH 2 Bu t(2),C (CH 3)2 Et(3))是通过Ti(OSiMe 3)4与适当的有机酸反应以定量收率合成的。晶体结构测定表明,1 – 3的分子由[Ti 6-(μ3 -O)6 ]核心由六个syn – syn羧基桥和六个末端氧化硅配体稳定。每个金属原子被六个氧原子包围,并覆盖扭曲的八面体的三角形面。光谱表征的(IR,NMR)1 - 3揭示了羧酸基团相互作用的显著非等价,来自的的Ti-μ-OOC键的不对称性产生的顺式-顺式桥。通过TGA / DTA分析确定所研究化合物的热稳定性。