Synthesis of cis-p-dioxano-12-crown-4 and X-ray crystallography of the (1: 1) complex with lithium thiocyanate

…, GW Buchanan, C Bensimon

Index: Driega, Alex B.; Buchanan, Gerald W.; Bensimon, Corinne Canadian Journal of Chemistry, 1998 , vol. 76, # 2 p. 142 - 146

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Abstract

The synthesis of a novel 12-crown-4 analogue (cis-p-dioxano-12-crown-4 or cis-3, 6, 9, 13, 15-pentaoxabicyclo [9.3. 1] pentadecane) is described. The (1: 1) LiNCS complex crystallizes in the monoclinic Cc space group; a= 8.4973 (2) Å, b= 18.0659 (4) Å, c= 8.9168 (1) Å, and β= 90.713 (1)° with Z= 4. The crown adopts C 1 symmetry to which the Li+ is coordinated in a rectangular pyramid with an apical-NCS. Key words: crown ethers, ...