首页> 外文期刊>RSC Advances >Unique solubility of polyoxoniobate salts in methanol: coordination to cations and POM methylation
【24h】

Unique solubility of polyoxoniobate salts in methanol: coordination to cations and POM methylation

机译:聚氧杂酸盐在甲醇中的独特溶解度:与阳离子和POM甲基化的配位

获取原文
获取原文并翻译 | 示例
           

摘要

Sodium salts of hybrid organometallic POM complexes consisting of [M6O19](8)-(M-Nb, Ta) and half-sandwich fragments {Cp*M}(2+) (Cp* = eta(5)-C-5(CH3)(5); M = Rh, Ir) and {(C6H6)Ru}(2+) dissolve only in one organic solvent, that is, in methanol. From methanolic solutions, crystals of Na-4[ trans-{(C6H6) Ru}(2)Nb6O19]center dot 14.125MeOH center dot 2H(2)O (1), K-4[trans-{Cp* Rh} 2Nb(6)O(19)]center dot 4MeOH center dot 10H(2)O (2) and K4[trans{Cp*Ir}2Nb(6)O(19)]center dot 10MeOH center dot 4H(2)O (3) were isolated and characterized by X-ray analysis. Methoxo species [{LM'}2M(6)O(19-n)(OCH3)(n)] (n = 1-3) were detected in solution by ESI-MS and NMR, and they account only for about half of the total speciation in the solution. DFT calculations were used to calculate C-13 NMR chemical shifts in the methoxo complexes and to assess their relative stability. Reasons for the preferred solubility in methanol are discussed.
机译:由[M6O19](8)-(M-Nb,Ta)和半三明治片段{Cp * M}(2+)组成的杂化有机金属POM配合物的钠盐(Cp * = eta(5)-C-5( CH3)(5); M = Rh,Ir)和{(C6H6)Ru}(2+)仅溶于一种有机溶剂,即甲醇。从甲醇溶液中结晶Na-4 [反式{((C6H6)Ru}(2)Nb6O19]中心点14.125MeOH中心点2H(2)O(1),K-4 [反式{Cp * Rh} 2Nb (6)O(19)]中心点4MeOH中心点10H(2)O(2)和K4 [trans {Cp * Ir} 2Nb(6)O(19)]中心点10MeOH中心点4H(2)O( 3)被分离并通过X射线分析表征。通过ESI-MS和NMR在溶液中检测到Methoxo种类[{LM'} 2M(6)O(19-n)(OCH3)(n)](n = 1-3),它​​们仅占大约一半溶液中的总物种。 DFT计算用于计算甲氧络合物中的C-13 NMR化学位移并评估其相对稳定性。讨论了在甲醇中优选的溶解度的原因。

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