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A new family of strap porphyrins exhibiting out/in overhanging carboxylic acid stereoisomerism, has been synthesized and investigated for its coordination properties. Their 5,10 linkage allows a significant flexibility of the strap which exhibits various degrees of angulation relatively to the mean porphyrin plane, making the ligand adjustable to the metal it binds. Notably, in the case of Bi(III),...