which could generally also be obtained directly from NbCl4, were then isolated. All the niobium(IV) molecular species: Nb2Cl6[H2B(pz)3]2, Nb2Cl6[H2B(pz)3]2(pzH)2, Nb2Cl4[HB(pz)3]4, Nb2Cl6[H2B(pz)2]2(MeCN)2, Nb2Cl5[H2B(pz)2]3, Nb2Cl4[H2B(pz)2]4 and Nb2Cl2[H2B(pz)2]6, were found to be diamagnetic in the solid as in solution. Their characterisation was achieved by microanalysis, molecular weight data
摘要研究了Nb2Cl10或NbCl4与氢化三和氢化双(1-
吡唑基)
硼酸钾盐在不同
配体与
金属摩尔比(R)下的反应。Nb2Cl10与聚(1-
吡唑基)
硼酸酯在R = 1
化学计量中的室温或低温反应会导致生成
铌(V)离子物种,例如NbCl5 [HB(pz)3]} K和NbCl5 [H2B(pz) )2]} K。如果先前的反应在较高的温度下进行或R增加,则观察到还原为
铌(IV),然后分离出通常也可以直接从NbCl4中获得的分子种类。所有
铌(IV)分子种类:Nb2Cl6 [H2B(pz)3] 2,Nb2Cl6 [H2B(pz)3] 2(pzH)2,Nb2Cl4 [HB(pz)3] 4,Nb2Cl6 [H2B(pz)2发现在溶液中,] 2(MeCN)2,Nb 2 Cl 5 [H 2 B(pz)2] 3,Nb 2 Cl 4 [H 2 B(pz)2] 4和Nb 2 Cl 2 [H 2 B(pz)2] 6具有抗磁性。