The synthesis and structure of trans-di(cyano-κ)-(trans-6,13-dimethyl-6,13-bis(propionylamido)-1,4,8,11-tetraazacyclotetradecane-κ)cobalt(III) perchlorate dihydrate |
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| Authors: | Neil F Curtis Rebekah Pawley Ward T Robinson |
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| Institution: | 1. School of Chemical and Physical Sciences, Victoria University of Wellington, Box 600, Wellington, New Zealand;2. Chemistry Department, University of Canterbury, Christchurch, New Zealand |
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| Abstract: | trans-Di(cyano-κ1)-(trans-6,13-dimethyl-6,13-bis(propionylamido)-1,4,8,11-tetraazacyclotetradecane-κ4)cobalt(III) perchlorate dihydrate, trans-Co(C18H38N6O2)(CN)2)]ClO4 · 2H2O, is formed by reaction of trans-Co(diam)(CN)2]ClO4 · 2H2O (diam = trans-6,13-diamino-6,13-dimethyl-1,4,8,11-tetraazacyclotetradecane) with propionic anhydride in DMF. The centrosymmetrical cation has the azamacrocycle in planar coordination by the four secondary amine nitrogen atoms of the azamacrocycle, with Co–N = 1.979(2) and 1.968(2) Å and with trans cyano groups with Co–C = 1.920(2) Å. The propionylamido substituents are axially oriented, with the terminal methyl group disordered over two sites. |
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| Keywords: | Cobalt(III) compounds Cyclic tetraamine Azamacrocycle Amido-substitution Crystal structure Cyanide coordination |
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