Structure of iron (II) and cobalt (II) bromide complexes in aqueous solution by X-ray diffraction analysis期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Structure of iron (II) and cobalt (II) bromide complexes in aqueous solution by X-ray diffraction analysis

Authors:	Mitsuyoshi Ichihashi Hisanobu Wakita Isao Masuda

Affiliation:	(1) Department of Chemistry, Faculty of Science, Fukuoka University, Nanakuma, Jonan-ku, 814-01 Fukuoka, Japan

Abstract:	Structures of bromo-metal complexes in concentrated aqueous solutions of FeBr₂ and of CoBr₂ were investigated by X-ray diffraction analysis. The complexes possess an octahedral geometry coordinating Br^– along with H₂O ligands. The frequency factors of metal-Br contacts per one atom of metal were 0.325 for the 2.7M (mol-dm^–3) and 0.747 for the 4.5M FeBr₂ solutions, and 0.280 for the 2.8M and 0.595 for the 4.3M CoBr₂ solutions. The frequency factors suggested that the tendency of metal ions to forming monobromo complexes is in the order, Fe>Co>Ni

Keywords:	Aqueous solutions solute structure formation constants cobalt(II) bromide iron(II) bromide X-ray diffraction
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