ISSN:
1573-1111
Keywords:
Molecular separation by crystalline complexation
;
coordinato-clathrates
;
inclusion complexes
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract This paper is concerned with 1∶1 inclusion complexes of the 1,1-di(p-hydroxyphenyl)cyclohexane host with either phenol or one of the cresol derivatives as guest. Selectivity studies showed preferential complexation with a guest according to the sequence;m-cresol 〉 p-cresol 〉 phenol 〉 o-cresol. Crystallographic analyses of the four complexes revealed isomorphous structures [crystal data for the phenol complex:a=6.232,b=10.849,c=14.845 Å, α=95.69, β=93.49, γ=104.31°, space groupPl,Z=2]. The intermolecular arrangements are characterized by layers of efficiently hydrogen bonded entities (host-to-host, host-to-guest and guest-to-host) parallel toab, every OH group being involved in two H-bonds. Organization of the layers alongc is stabilized by weak dispersion forces, thus being most sensitive to structural variation of the guest component. The observed features of selectivity upon crystalline complexation are related to differences in topological complementarity between the constituents of each structure.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00659365
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