A. Albrecht‐Gary, S. Blanc, L. David
Feb 1, 1994
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Journal
Inorganic Chemistry
Abstract
Cezomycin, a biosynthetic analogue of calcimycin (A 23187), was studied to evaluate the effect of changes in structural features on the coordination and transport of calcium and magnesium. Its protonation and calcium and magnesium complexation properties were examined at equilibrium in pure methanol using potentiometric and spectrophotometric methods. Like calcimycin, cezomycin forms two complexes with calcium and magnesium, a neutral twoligand A 2 M complex and a charged species AM + . The calcium species are slightly more stable than the corresponding magnesium species, and the cezomycin complexes are about 1 order of magnitude less stable than the corresponding calcimycin complexes