In the title compound, [CaCo(3)(C(4)H(5)NO(4))(3)(OH)(3)O(H(2)O)(5)]·2.54H(2)O, the Co atom is octa-hedrally coordinated by one imino-diacetate (ida) dianion as a facial O,N,O'-tridentate ligand, two μ(3)-OH groups and one μ(3)-O ligand, forming an partial Co(3)O(4) cubane cluster. This unit coordinates to a Ca(II) cation in an O,O',O''-tridentate fashion, generating a distorted CaCo(3)O(4) cubane-type cluster. The Ca-μ(3)-O distances [2.429 (5)-2.572 (6) Å] are much longer than the Co-μ(3)-O bonds [1.895 (5)-1.941 (5) Å]. The Ca(II) cation is also coord-inated by five water mol-ecules with Ca-O distances in the range 2.355 (6)-2.543 (6) Å. There are three additional uncoordinated water mol-ecules in the asymmetric unit, the occupancy of which refined to 0.54 (3). In H(2)O (or D(2)O), the title complex hydrolyses to Ca(2+) (aq) cations and [Co(3)(ida)(3)(μ(2)-OH)(3)(μ(3)-O)](2-) anions.
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http://dx.doi.org/10.1107/S1600536810010998 | DOI Listing |
ChemMedChem
January 2025
National Taiwan University, Chemistry, No.1, Sec.4, Roosevelt Road, Deptartment of Chemistry, Rm A521, 106319, Taipei, TAIWAN.
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Institute of Basic Biological Problems, Federal Research Center "Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences", 142290 Pushchino, Russia.
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January 2025
Magnetic Resonance Center, Department of Chemistry, University of Florence, Sesto Fiorentino, Italy. Electronic address:
Calcium- and Integrin-Binding protein 2 (CIB2) is a widely expressed protein with an uncertain biological role. Two of its four EF-hand motifs bind Mg(II) and/or Ca(II), thus triggering conformational changes. Although previous studies suggested that CIB2 preferentially binds Mg(II) over Ca(II) under physiological conditions, an atomic level characterization of CIB2 in the presence of both cations was lacking.
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Laboratory of Geology of the Sahara, University Kasdi Merbah Ouargla, 30000, Ouargla, Algeria.
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View Article and Find Full Text PDFEnviron Sci Pollut Res Int
December 2024
Chemistry Department, Faculty of Science, Beni-Suef University, Beni-Suef, 62511, Egypt.
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