Sunzi~znry Routes are developed for synthesis of porphyrins carrying functionalised bridges over tlle rnacrocycle ; the FeII coriiplescs of these products are of interest in relation t o niyoglobin and liaemoglobin.
X-Ray crystal structures of an anthracenebridged porphyrin and of a pyridine-bridged analogue show 'off-set' conformations with close van der Waals stacking of the bridging groups on the porphyrin macrocycles.
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