首页> 外文期刊>Chemistry: A European journal >Step-by-Step Uncoordination of the Pyrazolyl Rings of Hydrotris(pyrazolyl)borate Ligands in Complexes of Rh~I and Rh~III
【24h】

Step-by-Step Uncoordination of the Pyrazolyl Rings of Hydrotris(pyrazolyl)borate Ligands in Complexes of Rh~I and Rh~III

机译:Rh〜I和Rh〜III配合物中氢(吡唑基)硼酸酯配体的吡唑基环的逐步失配

获取原文
获取原文并翻译 | 示例
           

摘要

Compounds of rhodium(I) and rhodium(III) that contain ancillary hydrotris(pyrazolyl)borate ligands (Tp') react with monodentate and bidentate tertiary phosphanes in a step-wise manner, with incorporation of P-donor atoms and concomitant replacement of the Tp' pyrazolyl rings. Accordingly, [Rh(k~3-Tp~(Me_2))(C_2H_4)(PMe_3) ] (1b), converts initially into [Rh(k~2-Tp~(Me_2))(PMe_3)_2] (3), and then into [Rh(k~1-Tp~(Me_2))(PMe_3)_3] (2) upon interaction with PMe_3 at room temperature, in a process which can be readily reversed under appropriate experimental conditions. Full disengagement of the Tp' ligand is feasible to give Tp' salts of rhodium(I) complex cations, for example, [Rh(CO)(dppp)_2] [T~(Me_2,4-Cl)] (5; dppp=Ph_2P(CH_2)_3PPh_2), or [Rh(dppp)_2][Tp~(Me_2,4-Cl)] (6). Bis(hydride) derivatives of rhodium(III) exhibit similar substitution chemistry, for instance, the neutral complex [Rh(Tp)(H)_2(PMe_3)] reacts at 20deg C with an excess of Pme_3 to give [Rh(H)_2(PMe_3)]_4][Tp] (9b). Single-crystal X-ray-studies of 9b, conducted at 143 K, demonstrate the absence of bonding interactions between the [Rh(H)_2(PMe_3))_4]~+ and Tp ions, the closest Rh…N contact being at 4.627 A.
机译:含有辅助氢三(吡唑基)硼酸酯配体(Tp')的铑(I)和铑(III)化合物与单齿和双齿叔膦逐步反应,并引入P-给体原子并随之取代Tp'吡唑基环。因此,[Rh(k〜3-Tp〜(Me_2))(C_2H_4)(PMe_3)](1b)最初转换为[Rh(k〜2-Tp〜(Me_2))(PMe_3)_2](3) ,然后在室温下与PMe_3相互作用时变成[Rh(k〜1-Tp〜(Me_2))(PMe_3)_3](2),该过程可以在适当的实验条件下轻易逆转。 Tp'配体的完全脱离是可行的,以得到铑(I)络合阳离子的Tp'盐,例如[Rh(CO)(dppp)_2] [T〜(Me_2,4-Cl)](5; dppp = Ph_2P(CH_2)_3PPh_2)或[Rh(dppp)_2] [Tp〜(Me_2,4-Cl)](6)。铑(III)的双(氢化物)衍生物具有相似的取代化学,例如,中性络合物[Rh(Tp)(H)_2(PMe_3)]在20°C下与过量的Pme_3反应得到[Rh(H) _2(PMe_3)] _ 4] [Tp](9b)。 9b的单晶X射线研究在143 K下进行,表明[Rh(H)_2(PMe_3))_ 4] +和Tp离子之间没有键相互作用,最接近的Rh…N接触是在4.627安

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号