title: pH-dependent displacement of [Bi(citrate)](-) with cysteine: Synthesis, spectroscopic and X-ray crystallographic characterization of Bi(cysteine)3.
abstract: The compound Bi(cys)(3).H(2)O (cys=L-cysteine) has been obtained from the displacement reaction of [Bi(cit)](-) (cit=citrate) with cys in aqueous solution, and characterized by X-ray crystallography for the first time. It crystallizes in orthorhombic system with the space group P2(1)2(1)2(1), a=5.135(3)A, b=11.841(7)A, c=28.120(16)A, V=1709.8(17)A(3). The displacement reaction between bismuth citrate with cysteine in aqueous solution has been found to be pH-dependent and the complete displacement of the bound citrate with cysteine occurs at physiological pH value.
authors.affiliation: State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Science, Fuzhou, Fujian 350002, China. yongjing_wang@fjirsm.ac.cn
authors.forename: Yong-Jing
authors.initials: YJ
authors.lastname: Wang
authors.forename: Li
authors.initials: L
authors.lastname: Xu
mesh_terms: D018360:Crystallography, X-Ray; D003545:Cysteine / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D009682:Magnetic Resonance Spectroscopy; D008958:Models, Molecular; D013056:Spectrophotometry, Ultraviolet
chemical_list: D003545:Cysteine