The Role of Manganese Complexes in Material Science

Studies devoted to create high-density molecular memory devices (ideally, it is hoped to find materials in which each bit of digital information might be stored on a single molecule) are very active89 and larger manganese-carboxylate assemblies have been obtained (up to 

The commonest oxidation states of iron in its complexes are II and III (electronic configuration d6 and d5, respectively), but, as we shall see, the I and IV oxidation states are also accessible. 

Stated that in the vast majority of cases, the Fe(III)/Fe(II) process is chemically reversible, we begin the survey of these two oxidation states of iron with tetracoordinated complexes. 

Tetrachloroferrates(II) are high spin (d6-e3t23, four unpaired electrons). For example, the derivative [H-TMPP]2[FenCl4] (H-TMPP = protonated tris(2,4,6-trimethoxylphenyl)phosphine) has magnetic 

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