Kinetics of formation and dissociation of the ternary complex ion (pentane-2,4-dionato)(nitrilotriacetato)chromate(III) in aqueous media |
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| Authors: | Sanjoy Kumar Bhattacharyya Rupendranath Banerjee |
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| Affiliation: | Department of Chemistry, Jadavpur University, Calcutta 700032, India |
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| Abstract: | Synthesis of solid [Cr(nta)(H2O)2] 1, kinetics and equilibrium of ots reaction with pentane-2,4-dione (Hpd) to form [Cr(nta)(pd)]− 2 (H3nta is nitrilotriacetic acid), aquation of 2 into 1, and some related reactions have been described. Parallel proton-independent and inverse proton-dependent paths lead from 1 to 2. The [H+]−1 path arises from metal assisted deprotonation of HE, the enol form of Hpd. Aquation of 2 into 1 involves [Cr(Hnta)(pd)(H2O]+ 2H (Hnta is tridentate nta) in addition to 2. The nta comples 1 is considerably more labile and a weaker acid than [Cr(H2O)6]3+. |
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| Keywords: | kinetics chromium(III) nitrilotriacetic acid pentane-2,4-dione formation aquation |
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