Abstract
A new complex [Cs(Db18C6)2]+[FeCl4]− was prepared and studied by X-ray diffraction (orthorhombic, space groupP21212,a = 22.934 A,b= 24.024 A,c= 16.665 A,Z= 8; direct method, anisotropic full-matrix least-squares refinement,R= 0.087 for all 8800 independent reflections; CAD4 automated diffractometer, λMoK α. Two independent [FeCl4]− anions have a slightly distorted tetrahedral structure. Two independent host-guest type complex cations [Cs(Db18C6)2]+ have a sandwich structure. The Cs+ cation is located between two Db18C6 crown ligands below and above the centers of their 18-membered macrocycles and is coordinated by all 12 O atoms. The coordination polyhedron of Cs+ (C.N. 12) is a distorted hexagonal antiprism rotated toward a hexagonal prism.
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