trans‐Cyano(6‐methyl‐1,4,8,11‐tetraazacyclotetradecan‐6‐amine)cobalt(III) bis(perchlorate) hydrate and trans‐hydroxo(6‐methyl‐1,4,8,11‐tetraazacyclotetradecan‐6‐amine)cobalt(III) bis(perchlorate) |
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Authors: | Paul V Bernhardt Brendan P Macpherson |
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Abstract: | The crystal structures of a pair of closely related macrocyclic cyano‐ and hydroxopentaaminecobalt(III) complexes, as their perchlorate salts, are reported. Although the two complexes, Co(CN)(C11H27N5)](ClO4)2·H2O and Co(OH)(C11H27N5)](ClO4)2, exhibit similar conformations, significant differences in the Co—N bond lengths arise from the influence of the sixth ligand (cyano as opposed to hydroxo). The ensuing hydrogen‐bonding patterns are also distinctly different. Disorder in the perchlorate anions was clearly resolved and this was rationalized on the basis of distinct hydrogen‐bonding motifs involving the anion O atoms and the N—H and O—H donors. |
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