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Abstract
Crystals of cis-diazidobis(ethylenediamine)cobalt(III) tetrafluoroborate nitrate [ cis-Co(en) 2(N 3) 2] 2 (BF 4) (NO 3) I and cis-diazidobis(ethylenediamine)cobalt(III) hexafluorosilicate, [ cis-Co(en) 2(N 3) 2] 2(SiF 6) II have been obtained by slowly mixing the separately dissolved cis-diazidobis(ethylenediamine)cobalt(III) nitrate with sodium salt of tetrafluoroborate and hexafluorosilicate in aqueous medium in 1:1 and 2:1 molar ratio, respectively. Elemental analyses and spectroscopic techniques (IR, UV/visible, 1H and 13C NMR) were studied for characterizing the complex salts. Single crystal X-ray structure determinations revealed supramolecular assemblies via hydrogen bonding network between ionic groups and NH 2 group of coordinated ethylenediamine molecules, i.e. second-sphere coordination.
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