Phthalocyanines bidentate

Octasubstituted bis(phthalocyanines) 22 have been reported in the case of lanthanide elements. They contain eight bidentate substituents bound to the macrocycle.159,194... 

A bidentate ligand such as pyrazine allows phthalocyanine units to link independently to a... 

Rhodium phthalocyanines - In view of the current interest in polymeric bridged phthalocyanines [110], Rh(III) phthalocyanines with trans-bidentate ligands were synthesized. RhCl(Pc)L (obtained from o-cyanobenzamide) [290] appears to strongly hold its chloride ligand. Action of ligands L, namely pyridine,... 

Halogen oxidation of planar complexes, particularly of the nickel triads that contain bidentate glyoximes or macrocyclic ligands, such as, phthalocyanines, substituted porphyrins, or tetraazaannulenes, leads to highly conducting substances that may possess chains of metal atoms as well as chains of polyhalides ... 

Ni(ii) forming 4 coplanar bonds. Planar diamagnetic complexes include the Ni(CN)4 ion, which has been studied in the and other salts (Ni-C, 1-85 A), and molecules such as (a) and (b). The numerous complexes with bidentate ligands include the thio-oxalate ion, (c), molecules of the types (d) ) and (e), and the glyoximes, (0> notable for the short intramolecular hydrogen bonds. Many divalent metals form phthalocyanins, M(ii) replacing 2 H in C32H18N8 (Fig. 27.9). 

Kodak s aluminum phthalocyanine is formed as the dimer structure by using a bidentate ligand, bis(diphenylsiloxy) dianion, as the third ligand. This bulky and hydrophobic ligand may prevent exchange reactions of the ligand in aqueous ink systems. 

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