New Complexes of Niobium(
<scp>V</scp>
) and Tantalum(
<scp>V</scp>
) with Monoanionic NNO Heteroscorpionate Ligands
作者:Antonio Otero、Juan Fernández‐Baeza、Antonio Antiñolo、Juan Tejeda、Agustín Lara‐Sánchez、Luis Sánchez‐Barba、Ana M. Rodríguez
DOI:10.1002/ejic.200300451
日期:2004.1
48 h, the oxo complexes [MCl2(O)(κ3-bdmpzx)] (x = a, M = Nb 6, Ta 7; x = e, M = Nb 8, Ta 9) were isolated. The structures of these complexes have been determined by spectroscopic methods and the X-ray crystal structure of 8 has been established. Finally, a new class of heteroscorpionate-metal complexes containing an alkoxide ligand has been prepared. Direct reaction of the complexes [MCl4(κ3-bdmpza)]
基于双(3,5-二甲基吡唑-1-基)乙酸(Hbdmpza) (1) 的新合成路线得到了醇2,2-双(3,5-二甲基吡唑-1-基)乙醇(Hbdmpze)产量良好。这种醇和相关的锂化合物 [Li(bdmpza)(H2O)}4] 是将这些蝎形配体引入过渡金属配合物的极好前体。例如,锂化合物和 Hbdmpze(后者在预先加入 nBuLi 之后)与 MCl5(M = Nb,Ta)的 THF 溶液反应,在 -70 °C 搅拌 12 小时后,得到一种溶液,其中复合物 [MCl4(κ3-bdmpzx)] (x = a, M = Nb 2, Ta 3; x = e, M = Nb 4, Ta 5) 已被分离出来。当 2-5 的 THF 溶液在约 20 °C 48 小时,氧配合物 [MCl2(O)(κ3-bdmpzx)] (x = a,M = Nb 6,Ta 7;x = e,M = Nb 8,Ta 9)。这