Phthalocyaninato 2- iron II

(DIOXYGEN)(W-METHYLIM1DAZOLE)[(all-cis)-5,10,15,20-TETRAKIS [ 2- (2,2-DIMETH Y LPROPION AMIDO) -PHENYL] PORPHYRIN ATO (2-) ] IRON(II) 

These molecules, which also reversibly bind the dioxygen ligand, may help in unraveling the mysteries of oxygen-binding and activation. 2,s 

The procedures detailed below include a considerable amount of organic synthesis that is indispensable if one wishes to study the coordination chemistry of the ultimate product, and hence it is included. All the steps may be scaled down but only the last two steps may be scaled up efficiently. Many of the compounds in the sequence are used in subsequent steps without further purification. Analytical data are included for those materials that must be pure if the following steps are to succeed. 

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Phthalocyaninato(2-)] iron(II) is a dark blue, thermally stable solid that can be sublimed in vacuo at 300°. It is very soluble in pyridine, giving deep blue solutions of the bis(pyridine) adducts. It also forms an unstable purple hexaaniline adduct when dissolved in aniline. It is soluble in concentrated sulfuric add and dimethyl sulfoxide (slightly) but is insoluble in most other organic solvents. The iron(II) complex, unlike the corresponding iron(II) porphines, is relatively stable toward oxidation to the iron (III) state. The electronic spectrum shows the following absorption bands (1-chloronaphthalene solution) 595 (e = 16,000), 630 (e = 17,000), 658 (e = 63,000) (pyridine solution) 333 (e = 45,000), 415 (e = 15,000), 395 (e = 2000), 658 nm (e = 8000). 

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