TY - JOUR
T1 - Crystal Structures and EPR Spectra of Cu2+-Doped Magnesium(II) and Cadmium(II) Methoxyacetates
AU - Hitchman, M.A.
AU - Hockless, D.C.R.
AU - Skelton, Brian
AU - Stratemeier, H.
AU - White, Allan
PY - 2007
Y1 - 2007
N2 - Magnesium methoxyacetate crystallizes from aqueous solution as a dihydrate, isomorphous with its nickel(II) and copper(II) counterparts, the six-coordinate metal atoms being disposed on crystallographic inversion centres in space group P2(1)/n. The cadmium complex is anhydrous, the six-coordinate metal atoms being linked into a two-dimensional polymer parallel to the ab plane in space group P2(1)/c by bridging coordination through carboxylate oxygen atoms. The powder EPR spectra of traces Of Cu2+ doped into the magnesium(II) and cadium(II) compounds show slight temperature dependences, with the higher two g-values converging as the temperature is raised from similar to 77 K to 290 K. This is analysed in terms of an equililibrium between complexes having similar geometries, but with the long and intermediate bond directions interchanged. The behaviour is in contrast to that of the pure copper(II) complex, where the thermal properties appear to be influenced by cooperative interactions.
AB - Magnesium methoxyacetate crystallizes from aqueous solution as a dihydrate, isomorphous with its nickel(II) and copper(II) counterparts, the six-coordinate metal atoms being disposed on crystallographic inversion centres in space group P2(1)/n. The cadmium complex is anhydrous, the six-coordinate metal atoms being linked into a two-dimensional polymer parallel to the ab plane in space group P2(1)/c by bridging coordination through carboxylate oxygen atoms. The powder EPR spectra of traces Of Cu2+ doped into the magnesium(II) and cadium(II) compounds show slight temperature dependences, with the higher two g-values converging as the temperature is raised from similar to 77 K to 290 K. This is analysed in terms of an equililibrium between complexes having similar geometries, but with the long and intermediate bond directions interchanged. The behaviour is in contrast to that of the pure copper(II) complex, where the thermal properties appear to be influenced by cooperative interactions.
U2 - 10.1002/zaac.200700288
DO - 10.1002/zaac.200700288
M3 - Article
SN - 0044-2313
VL - 633
SP - 2004
EP - 2008
JO - Zeitschrift fuer Anorganische und Allgemeine Chemie
JF - Zeitschrift fuer Anorganische und Allgemeine Chemie
IS - 11-12
ER -