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A Comparison of Local Structures in Crystalline P(EO)_3LiCF_3SO_3 and Glyme-LiCF_3SO_3 Systems

机译:晶体P(EO)_3LiCF_3SO_3和Glyme-LiCF_3SO_3系统中局部结构的比较

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摘要

The newly discovered crystal structures of CH_3(OCH_2CH_2)OCH_3(LiCF_3SO_3)_2, monoglyme:(LiTf)_2, and CH_3(OCH_2CH_2)_3OCH_3(LiCF_3SO_3)_2, triglyme:(LiTf)_2, are briefly described. The coordination of lithium cations and the CF_3SO_3 anions in these structures is compared with the cation and anion coordination in the crystalline phase of high molecular weight P(EO)_3LiCF_3SO_3. Comparison is also made with the previously reported crystalline phase of CH_3(OCH_2CH_2)_2OCH_3LiCF_3SO_3, diglyme:LiTf. A tendency to form trans-gauche-trans conformations for the bond order -O-C-C-O- is noted in adjacent ethylene oxide sequences interacting with a five-coordinate lithium ion.
机译:简要描述了新发现的CH_3(OCH_2CH_2)OCH_3(LiCF_3SO_3)_2的晶体结构,一字形:(LiTf)_2和CH_3(OCH_2CH_2)_3OCH_3(LiCF_3SO_3)_2,三字形:(LiTf)_2。比较了这些结构中锂阳离子和CF_3SO_3阴离子的配位与高分子量P(EO)_3LiCF_3SO_3结晶相中阳离子和阴离子的配位。还与先前报道的CH_3(OCH_2CH_2)_2OCH_3LiCF_3SO_3的结晶相(diglyme:LiTf)进行了比较。在与五配位锂离子相互作用的相邻环氧乙烷序列中,注意到形成键序为-O-C-C-O-的反式构象反式构象的趋势。

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