The structures of some (hexamethyl-1,5,9,13-tetraazacyclohexadecadiene)copper(II) compounds
| Autor: | Joyce M. Waters, Neil F. Curtis, Clifton E. F. Rickard, Kelly Flood, Ward T. Robinson |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
chemistry.chemical_classification
Thiocyanate Stereochemistry Chemistry Imine chemistry.chemical_element Salt (chemistry) Crystal structure Copper Inorganic Chemistry chemistry.chemical_compound Perchlorate Crystallography Materials Chemistry Physical and Theoretical Chemistry Enantiomer Coordination geometry |
| Zdroj: | Polyhedron. 28:739-748 |
| ISSN: | 0277-5387 |
| DOI: | 10.1016/j.poly.2008.12.029 |
| Popis: | The structure of the crystalline azamacrocyclic product formed by reaction of bis(propane-1,3-diamine)copper(II) perchlorate with acetone has been determined as N-rac -(6,8,8,14,16,16-hexamethyl-1,5,9,13-tetraazacyclohexadeca-5,13-diene)copper(II) · N-meso -(6,8,8,14,14,16-hexamethyl-1,5,9,13-tetraazacyclohexadeca-5,16(1)-diene)copper(II) perchlorate, with the cis , 5,16(1)-diene, and trans , 5,13-diene, isomeric cations co-crystallised. The structures of three compounds crystallised from solutions of this mixture have been determined. N-rac -(6,8,8,14,14,16-hexamethyl-1,5,9,13-tetraazacyclohexadeca-5,16(1)-diene)copper(II) tetrachlorozincate has an irregular flattened tetrahedral coordination geometry with trans -N-Cu-N angles of 139.27(8)° and 155.94(8)°. (Hexamethyl-1,5,9,13-tetraazacyclohexadecadiene)(thiocyanato- N )copper(II) perchlorate has twofold symmetrical square-pyramidal cations. A (μ-cyano)-tetracyanonickelate(II) compound has two (hexamethyl-1,5,9,13-tetraazacyclohexadecadiene)copper(II) cations each with a single axially coordinated tetracyanonickelate(II) group. The compounds, except for the tetrachlorozincate(II) salt, show disorder in the location of the imine functions and axial methyl substituents, attributed to co-crystallisation of enantiomers for the N-rac-trans isomer and/or of rotated arrangements of the N-meso-cis isomer. For the thiocyanato and tetracyanonickelato compounds this disorder precluded unambiguous assignment of configuration. |
| Databáze: | OpenAIRE |
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