Complexes of Tungsten(VI) with Mucic Acid: a Spectrophotometric and Polarimetric Study in Aqueous Solution |
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| Institution: | 1. Department of Chemistry, Department of Pharmaceutical Sciences, Guru Jambheshwar University of Science & Technology, Hisar, 125001, Haryana, India;2. Department of Chemistry, National Institute of Technology Kurukshetra, Kurukshetra, 136119, Haryana, India;3. School of Pharmaceutical Sciences, Shoolini University, Solan, 173212, India;4. Life Science Division, Institute of Advanced Studies in Science & Technology, Guwahati, Assam, 781035, India;5. Department of Pharmaceutical Sciences, Guru Jambheshwar University of Science & Technology, Hisar, 125001, Haryana, India |
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| Abstract: | Spectrophotometric work on mucic acid-W(VI) system shows the formation of three different oxoanion complexes in aqueous solution; their stability is dependent upon pH. One of the complexes is monomeric tungstodimucate and the other two are 2/2 species. An anomalous cryoscopic behaviour, similar to that of W(VI) tartaric system, has been observed for the dimeric complex formed at higher pH. The stoichiometries and conditional dissociation constants have been polarimetrically determined by means of competitive reactions between the mucic and tartaric ligands. 1H and 13C NMR spectra have been interpreted for the similar complex species of both mucic and tartaric acids. |
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