Structure cristalline du complexe de magnésium de la calcimycine (A. 23187)
- 1 December 1985
- journal article
- research article
- Published by Canadian Science Publishing in Canadian Journal of Chemistry
- Vol. 63 (12) , 3482-3491
- https://doi.org/10.1139/v85-571
Abstract
The 1:2 magnesium ion complex of the antibiotic calcimycin (A. 23187) crystallizes in the space group P21 with cell dimensions a = 11.152(2), b = 27.684(2), c = 10.168(2) .ANG., .beta. = 107.02(2).degree., and Z = 2. The structure was refined to an R = 0.063 based on 3473 observed reflections. The octahedral coordination of the Mg2+ ion is highly symmetrical. Each calcimycin ion is bound to Mg2+ through a carboxyl oxygen, a carbonyl oxygen, and the nitrogen of the benzoxazole ring system. The Mg.sbd.O distances are respectively 2.00 .ANG. and 2.06 .ANG., the Mg.sbd.N distances 2.23 .ANG. (.sigma. .simeq. 0.01 .ANG.).This publication has 3 references indexed in Scilit:
- Crystal and molecular structure of the ferrous ion complex of A23187Journal of the American Chemical Society, 1984
- Crystal and molecular structure of the calcium ion complex of A23187Journal of the American Chemical Society, 1976
- The structure of the calcium complex of A23187, a divalent cation ionophore antibiotic.The Journal of Antibiotics, 1976