Issue 18, 1973

Synthesis and crystal structures of complexes between caesium thiocyanate and two isomeric macrocyclic crown polyethers, 6,7,9,10,17,18,20,21-octahydro-7R,9R,18S,20S-tetramethyldibenzo[b,k][1,4,7,10,13,16]hexaoxacyclo-octadecin (isomer F) and 6,7,9,10,17,18,20,21-octahydro-7R,9R,18R,20R-tetramethyldibenzo[b,k][1,4,7,10,13,16]-hexaoxacyclo-octadecin (isomer G)

Abstract

Two isomers, F and G, of tetramethyldibenzo-18-crown-6 each with 4 chiral carbon atoms give complexes with caesium thiocyanate; CsNCS(F) consists of centrosymmetrical dimeric molecules with Cs–N–Cs bridges, the other co-ordinating atoms being the six oxygens of F at 3·07–3·34 Å and the aryl carbon atoms at 3·79 Å, while CsNCS(G)2 consists of Cs(G)2+ cations having [4 with combining macron] symmetry with 12 Cs–O contacts at 3·17–3·43 Å and disordered thiocyanate ions.

Article information

Article type
Paper

J. Chem. Soc., Chem. Commun., 1973, 694-695

Synthesis and crystal structures of complexes between caesium thiocyanate and two isomeric macrocyclic crown polyethers, 6,7,9,10,17,18,20,21-octahydro-7R,9R,18S,20S-tetramethyldibenzo[b,k][1,4,7,10,13,16]hexaoxacyclo-octadecin (isomer F) and 6,7,9,10,17,18,20,21-octahydro-7R,9R,18R,20R-tetramethyldibenzo[b,k][1,4,7,10,13,16]-hexaoxacyclo-octadecin (isomer G)

A. J. Layton, P. R. Mallinson, D. G. Parsons and M. R. Truter, J. Chem. Soc., Chem. Commun., 1973, 694 DOI: 10.1039/C39730000694

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