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首页> 外文期刊>Polyhedron: The International Journal for Inorganic and Organometallic Chemistry >Formation of mixed-metal alkoxides mediated by the reactivity of coordinated pinacol Synthesis and molecular structures of Ce_2Ti_2(#mu#-O)_2(#mu#,#eta#~2-OCMe_2CMe_2O)_4(OPr~i)_4(Pr~iOH)_2 and of Ce_2Nb_2(#eta#_3-O)_2(#mu#,#eta#~2-OCMe_2CMe_2O)_4(OP
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Formation of mixed-metal alkoxides mediated by the reactivity of coordinated pinacol Synthesis and molecular structures of Ce_2Ti_2(#mu#-O)_2(#mu#,#eta#~2-OCMe_2CMe_2O)_4(OPr~i)_4(Pr~iOH)_2 and of Ce_2Nb_2(#eta#_3-O)_2(#mu#,#eta#~2-OCMe_2CMe_2O)_4(OP

机译:Ce_2Ti_2(#mu#-O)_2(#mu#,#eta#〜2-OCMe_2CMe_2O)_4(OPr〜i)_4(Pr〜)的配位频哪醇反应性介导的混合金属醇盐的形成iOH)_2和Ce_2Nb_2(#eta#_3-O)_2(#mu#,#eta#〜2-OCMe_2CMe_2O)_4(OP

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摘要

The addition of pinacol to mixtures of titanium and cerium isopropoxides as well as the use of insoluble titanium and cerium pinacolate synthons was investigated as a route to M-Ce (M = Ti, Nb) species. Pinacol was able to promote the formation of mixed-metal species and the first Ce-Ti and Ce-Nb species namely Ce_(2Ti)(pin)_2(OPr~i)_8 and [M_2Ce_2(#mu#_3-O)_2(#mu#,#eta#~2pin)_4(OPr~i)_6H_x] [M = Ti, x = 2; M = Nb, x = 0; pin = OCMe_2-COMe_2] were isolated and characterized by FT-IR and ~1H NMR. The latter were also characterized by X-Ray diffraction. Their structures are based on a rhombus compressed along the M...M direction with 6-coordinated metals. The pinacolate moieties act as bridging-chelating ligands. The metal-oxygen bond lengths vary according to M-O(pin)
机译:研究了将频哪醇添加到异丙醇钛和铈混合物中,以及使用不溶性频哪醇钛和铈松果酸合成子作为制取M-Ce(M = Ti,Nb)物质的途径。品那可能够促进混合金属物种和第一个Ce-Ti和Ce-Nb物种的形成,即Ce_(2Ti)(pin)_2(OPr〜i)_8和[M_2Ce_2(#mu#_3-O)_2 (#mu#,#eta#〜2pin)_4(OPr〜i)_6H_x] [M = Ti,x = 2; M = Nb,x = 0;分离得到[pin = OCMe_2-COMe_2]并通过FT-IR和〜1H NMR表征。后者的特征还在于X射线衍射。它们的结构以菱形为基础,菱形沿M ... M方向压缩有6个配位金属。松果酸酯部分充当桥螯合配体。金属-氧键的长度根据M-O(pin)

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