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A comparison of local structures in crystalline P(EO) 3 LiCF 3 SO 3 and glyme‐LiCF 3 SO 3 systems
Author(s) -
Frech Roger,
Rhodes Christopher P.,
Khan Masood
Publication year - 2002
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/1521-3900(200208)186:1<41::aid-masy41>3.0.co;2-#
Subject(s) - chemistry , materials science , analytical chemistry (journal) , crystallography , organic chemistry
The newly discovered crystal structures of CH 3 (OCH 2 CH 2 )OCH 3 (LiCF 3 SO 3 ) 2 , monoglyme:(LiTf) 2 , and CH 3 (OCH 2 CH 2 ) 3 OCH 3 (LiCF 3 SO 3 ) 2 , triglyme:(LiTf) 2 , are briefly described. The coordination of lithium cations and the CF 3 SO 3 − anions in these structures is compared with the cation and anion coordination in the crystalline phase of high molecular weight P(EO) 3 LiCF 3 SO 3 . Comparison is also made with the previously reported crystalline phase of CH 3 (OCH 2 CH 2 ) 2 OCH 3 LiCF 3 SO 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.