![]() Elements are assigned to give the best fit to the integrated peak densities and if necessary additional elements are considered. After applying the resulting origin shifts and space-group symmetry, the solutions are subject to further dual-space recycling followed by a peak search and summation of the electron density around each peak. All space groups in the specified Laue group are tested to find which are consistent with theġ phases. Missing data are taken into account and the resolution extended if necessary. The dipyridyl ligand contains a trans double bond which restricts the conformational freedom and favours a unique copper cube because 1,6‐ gives a different extended structure under related conditions.Įmploys a novel dual-space algorithm to solve the phase problem for single-crystal reflection data expanded to the space groupġ. Four dipyridyl ligands (1,6‐) fold and coordinate within a unique Cu4(OH)4 cube which has interesting magnetic properties. The low temperature magnetic susceptibility characteristics are examined in detail then modelled and compared to other similar Cu4O4 copper cubes. The magnetic susceptibility measurements show paramagnetic behaviour down to 50 K but below this the copper cube shows weak ferromagnetic exchange interactions. The cube classification corresponds to the type I classification of Mergehenn and Haase and the short/long distribution of Cu ⋅⋅⋅ Cu separations in the cube as defined by Ruiz. The structure was solved by an X‐Ray single crystal structure determination and low temperature magnetic susceptibility measurements examined its magnetic properties. This compound has a trans double bond which restricts the conformational freedom of the ligand and favours coordination within a unique copper cube. The synthesis of a Cu4(OH)4 cube which is coordinated by four molecules of the dipyridyl ligand 1,6‐ is reported.
0 Comments
Leave a Reply. |