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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Lewis base character of the phosphorus atom in phosphanido-niobocene complexes. Synthesis of new early-early homo- and heterobimetallic entities
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Lewis base character of the phosphorus atom in phosphanido-niobocene complexes. Synthesis of new early-early homo- and heterobimetallic entities

机译：膦酰基-新新星配合物中磷原子的路易斯碱特征。合成新的早期早期同金属和异双金属实体

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The reaction of phosphanido complexes [Nb(η5-C 5H4SiMe3)2(L)(PPh2)] [L = CO (1), CNXylyl (2)] with early transition metal halides in high oxidation states has been carried out. New bimetallic niobocene complexes [{Nb(η5-C5H4SiMe3) 2(L)}(μ-PPh2)(MCl5)] [M = Nb, L = CO (3), L = CNXylyl (4); M = Ta, L = CO (5), L = CNXylyl (6)] have been successfully synthesized by the reaction with [MCl5]2 (M = Nb or Ta). In a similar way [{Nb(η5-C5H4SiMe 3)2(L)}(μ-PPh2)(MCl4)] [M = Ti, L = CO (13), CNXylyl (14); M = Zr, L = CO (15), CNXylyl (16)] were synthesized using MCl4 (M = Ti or Zr). Solutions of complexes 4-6 in chloroform produced new ionic derivatives [Nb(η5-C5H 4SiMe3)2(P(H)Ph2)(L)] [MCl 6] [M = Nb, L = CO (7), L = CNXylyl (8); M = Ta, L = CO (9), L = CNXylyl (10)]. Ionic complexes [Nb(η5-C5H 4SiMe3)2(P(Cl)Ph2)(L)] [NbCl 4O(thf)] [L = CO (11), CNXylyl (12)] were formed from solutions in thf - rapidly in the case of 3 but more slowly for 4. New heterometallic complexes [Nb(η5-C5H4SiMe3) 2(L)(μ-PPh2){(Ti(η5-C5R 5)Cl3}] [R = H, L = CO (17), CNXylyl (18); R = CH 3, L = CO (19), CNXylyl (20)] were synthesized by the reaction of 1 or 2 with [Ti(η5-C5R5)Cl3] (R = H or CH3). All of these compounds were characterized by IR and multinuclear NMR spectroscopy, and the molecular structures of 9 and 12 were determined by single-crystal X-ray diffraction.
机译：已进行了膦酸酯基配合物[Nb（η5-C5H4SiMe3）2（L）（PPh2）] [L = CO（1），CNXylyl（2）]与早期过渡金属卤化物的高氧化态反应。新的双金属铌茂金属配合物[{Nb（η5-C5H4SiMe3）2（L）}（μ-PPh2）（MCl5）] [M = Nb，L = CO（3），L = CNXylyl（4）;通过与[MCl5] 2（M = Nb或Ta）反应已成功合成了M = Ta，L = CO（5），L = CNXylyl（6）]。以类似的方式[{Nb（η5-C5H4SiMe3）2（L）}（μ-PPh2）（MCl4）] [M = Ti，L = CO（13），CNXylyl（14）; M ＝ Zr，L ＝ CO（15），CNXylyl（16）]是用MCl4（M ＝ Ti或Zr）合成的。络合物4-6在氯仿中的溶液产生了新的离子衍生物[Nb（η5-C5H4SiMe3）2（P（H）Ph2）（L）] [MCl 6] [M = Nb，L = CO（7），L = CNXylyl（8）; M ＝ Ta，L ＝ CO（9），L ＝ CNXylyl（10）]。离子络合物[Nb（η5-C5H4SiMe3）2（P（Cl）Ph2）（L）] [NbCl 4O（thf）] [L = CO（11），CNXylyl（12）]是由thf中的溶液迅速形成的在3的情况下，但是对于4则更慢。新的杂金属配合物[Nb（η5-C5H4SiMe3）2（L）（μ-PPh2）{（Ti（η5-C5R5）Cl3}] [R = H，L = CO （17），CNXylyl（18）; R = CH 3，L = CO（19），CNXylyl（20）]是通过1或2与[Ti（η5-C5R5）Cl3]（R = H或CH3）。所有这些化合物均通过IR和多核NMR光谱表征，并且9和12的分子结构通过单晶X射线衍射确定。

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