trans-(5,7,7,12,14,14-Hexamethyl-1,4,8,11-tetraazacyclotetradeca-4,11-diene-κ4N,N′,N′′,N′′′)bis(nitrito-κN)cobalt(III) perchlorate hemihydrate

• Main Authors: Tapashi G. Roy, Babul C. Nath, Khadija Begum, Seik Weng Ng, Edward R. T. Tiekink
• Format: Article
• Language: English
• Published: International Union of Crystallography 2011-11-01
• Series: Acta Crystallographica Section E
• Online Access: http://scripts.iucr.org/cgi-bin/paper?S1600536811042784

The asymmetric unit of the title CoIII complex, [Co(NO2)2(C16H32N4)]ClO4·0.5H2O, comprises two complex cations, two perchlorate anions and a water molecule of crystallization. The CoIII atoms exist within distorted octahedral N6 geometries defined by four N atoms of the macrocycle ligand and trans-N atoms derived from the nitrite anions. Systematic variations in the Co—N bond lengths are correlated with the presence of intramolecular N—H...O(nitrite) hydrogen bonds. In the crystal, water-O—H...O(perchlorate) hydrogen bonds, involving one of the independent perchlorate anions only, lead to supramolecular chains along the b-axis direction. The three-dimensional architecture is consolidated by numerous C—H...O interactions. The crystal studied was a non-merohedral, racemic twin.