Segregated Stack Crystals, Non-Integral Oxidation State Metal Complexes

4 Segregated Stack Crystals, Non-Integral Oxidation State Metal Complexes 

The chemical flexibility of the porphyrin-like metallomacrocycles139-141) provides an unusual opportunity to vary purposely and rationally the electronic properties of the molecular building block, and therefore of the resulting solid, through choice of the basic ligand, of peripheral substituents, and of incorporated metal. Variants to the porphyrin skeleton142 have been examined extensively  

this class of complexes contains two sizes of ring systems, and within each size the chemical and physical properties can be modulated by choice of bridge atom. Moreover, the basic structures are the foundation for an enormous range of complexes almost every metal ion in the Periodic Table can be inserted into the central hole of these 

A second series of compounds, based on the bis(a,/1-dionedioximates) of various transition metals, especially the Ni triad, has been extensively studied over a longer period4,145 m). 

Finally, the first reports120,121) of a conducting sulfur chelate, involving a partially oxidized metal dithiolate, have appeared as have reports of materials based on diben-zotetraaza[14]annulenes172 175 further analogues of the porphyrins. 

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