Platinum complexes magnetic properties

The first indications of covalency in complexes of two metal oxides appear if one of the metals belongs to the platinum group. The oxide complexes in this group are not well known only very recently a few complexes have been prepared and their magnetic properties measured. The compound Na2Ir03, that is formed when a mixture of the metal and Na2GOs is heated in oxygen... 

Metal Complexes.—In an extensive study of the complexing power of thiazoles, numerous zinc(n), cobalt(n), copper(ii), nickel(ii), andplatinum(n) complexes of the parent compound, and of 4-alkyl- or 2,4-dialkyl-thiazoles, usually of the general type MX2L2, have been prepared. A consideration of their spectral and magnetic properties reveals that the zinc and cobalt complexes are tetrahedral, the 4-methyl copper and nickel complexes are octahedral, and the dialkyl complexes of copper and nickel and the platinum complexes are square planar. The four-co-ordinate dialkyl complexes follow the crystal field stabilization energy predictions as to the relative tendency to form tetrahedral or square-planar forms, i.e. Zn > Co > Cu > Ni. The complexes are invariably metal-nitrogen, and not metal-sulphur, co-ordinated. ... 

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