ISSN:
1600-5740
Source:
Crystallography Journals Online : IUCR Backfile Archive 1948-2001
Topics:
Chemistry and Pharmacology
,
Geosciences
,
Physics
Notes:
The crystal structures of (1,5,9,13,20-pentamethyl-3,7,11,15,18,22-hexaazabicyclo[7.7.7]tricosane-κ6N,N′,N′′,N′′′,N′′′′,N′′′′′)nickel(II) diperchlorate–x(water) (x = 0.530), [Ni(C22H48N6)](ClO4)2.0.530H2O, and (1,5,9,13,20-pentamethyl-3,7,11,15,18,22-hexaazabicyclo[7.7.7]tricosane-κ6N,N′,N′′,N′′′,N′′′′,N′′′′′)zinc(II) diperchlorate–x(water) (x = 0.608), [Zn(C22H48N6)](ClO4)2.0.608H2O, are isomorphic and each is described as an intergrowth of four substructures, consistent with different modulations of an idealized parent structure of space group C2/c. Two substructures correspond to alternative orientations of a C1¯ structure for which x = 0 in the general formula [M(C22H48N6)](ClO4)2.xH2O, and two substructures correspond to alternative origins of a P21/n structure for which x = 1. Twinning also occurs. An analysis of the pseudosymmetry, a description of the refinement and a description of the refined structures are presented. The MN6 coordination geometry is essentially octahedral, in contrast to the trigonal-prismatic geometry observed for the CdII and HgII complexes of the same ligand.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1107/S0108768198012968
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