...
首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Desolvation and aggregation of sterically demanding alkali metal diarylphosphides
【24h】

Desolvation and aggregation of sterically demanding alkali metal diarylphosphides

机译:试验和聚集的空心碱金属金属二芳基二磷酸磷

获取原文
获取原文并翻译 | 示例
           

摘要

The reaction between (Dipp)(2)PH and one equivalent of n-BuLi, PhCH2Na or PhCH2K in THF gives the complexes [(Dipp)(2)P]Li(THF)(3) (2a), {[(Dipp)(2)P]Na(THF)(2)}(2) (3a) and [(Dipp)(2)P]K(THF)(4) (4a), respectively [Dipp = 2,6-iPr(2)C(6)H(3)]. Exposure of these compounds to vacuum yields the alternative solvates [(Dipp)(2)P]Li(THF)(2) (2b), [(Dipp)(2)P]Na(THF)(1.5) (3b), and [(Dipp)(2)P]K (4b), respectively; the alternative adduct [(Dipp)(2)P]Na(PMDETA) (3c) was prepared by treatment of 3a with PMDETA. Treatment of (Dipp)(Mes) PH or (Mes)(2)PH with one equivalent of n-BuLi in THF gives the complexes [(Dipp)(Mes)P]Li(THF)(3) (7a) and [(Mes)(2)P](2)Li-2(THF)(2)(OEt2) (8a) after crystallisation from diethyl ether [Mes = 2,4,6-Me3C6H2]; crystallisation of 8a from hexane gives the alternative adduct [(Mes)(2)P]Li(THF)(3) (8b). Exposure of 7a, 8a and 8b to vacuum leads to loss of coordinated solvent, yielding the solvates [(Dipp)(Mes)P]Li(THF)(2) (7b) and [(Mes)(2)P]Li(THF) (8c). The solid-state structures of complexes 2a, 3a, 3c, 4a, 7a, 8a, and 8b have been determined by X-ray crystallography. Variable-temperature P-31{H-1} and Li-7 NMR spectroscopy indicates that 2b, 3b and 7b are subject to a monomer-dimer equilibrium in solution, where the monomeric forms are favoured at low temperature. In contrast, variable-temperature P-31{H-1} and Li-7 NMR spectroscopy suggests that 8c is subject to a dynamic equilibrium between a dimer and a cyclic trimer in solution, where the trimer is favoured at low temperatures.
机译:(2)pH之间的反应和THF中的N-Buli,PHCH2NA或PHCH2K给予复合物[(dipp)(2)p] Li(THF)(3)(2A),{[(DIPP )(2)p] Na(THF)(2)}(2)(3a)和[(dipp)(2)p] k(thf)(4)(4)(4a),分别[dipp = 2,6-ipr (2)C(6)H(3)]。将这些化合物的暴露真空产生替代溶剂化物[(dipp)(2)p] Li(THF)(2)(2b),[(dipp)(2)p] Na(THF)(1.5)(3b),和[(dipp)(2)p] k(4b);通过用PMDeta处理3A,制备替代加合加合加合[(DIPP)(2)P] Na(PMDeta)(3C)。在THF中处理(DIPP)(MES)pH或(MES)(2)pH的pH,给予复合物[(dipp)(MES)p] LI(THF)(3)(7a)和[ (MES)(2)p](2)Li-2(THF)(2)(2)(OET2)(8a)从乙醚中结晶后[MES = 2,4,6-ME3C6H2]; 8A来自己烷的结晶,得到替代加合物[(MES)(2)P] Li(THF)(3)(8B)。暴露于7a,8a和8b真空导致损失配位溶剂,得到溶剂化物[(dipp)(mes)p] li(thf)(2)(2)(2)(7b)和[(mes)(2)p] li( THF)(8C)。通过X射线晶体学确定复合物2a,3a,3c,4a,7a,8a和8b的固态结构。可变温度P-31 {H-11}和Li-7 NMR光谱表明,2B,3B和7B在溶液中受单体二聚体平衡,其中单体形式在低温下优选。相反,可变温度P-31 {H-1}和Li-7 NMR光谱表明,8C在溶液中的二聚体和循环三聚体之间的动态平衡,其中三聚体在低温下有利。

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