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A series of porphyrin analogues with pyrazole rings replacing one of the usual pyrrole subunits have been synthesized. This was… Expand The first structural investigation of a zinc(II) and a free-base oxophlorin reveals considerable conformational differences… Expand Summary Treatment of zinc(II) deuteroporphyrin-IX dimethyl ester with thallium(III) trifluoroacetate, followed by acid treatment… Expand The reaction of polypyrrole macrocycles with di-µ-chloro-bisdicarbonylrhodium gives rise to out-of-plane mono-(with corroles and… Expand Porphyrins are highly sigma-electron donating bases and very weak pi-acids. Hence they increase the electron density on central… Expand 1. Tritiated oxymesoporphyrins and their ferrihaems were tested as possible intermediates in the catabolism of haemoglobin. The… Expand