Abstract
Stability constants of the ternary complexes [CuAL] whereA = 5-Nitro-1,10-phenanthroline, bis(2-pyridyl) ketone (DPK) orbis(2-pyridyl)amine (DPA) andL is the dianion of catechol, tiron, protocatechic acid, pyrogallol, 1,8-dihydroxynaphthalene, catecholaldehyde, 2,3-dihydroxynaphthalene, dopamine or adrenaline have been determined by potentiometric titration in dioxane water (1:1 v/v) medium using a SCOGS computer programme. The observed trend of stability is explained on the basis of the nature of substitution over the ligands, chelate ring size and also the composition of mixed solvent in case of DPK. Structural changes in DPK have also been discussed as a function of pH, composition of medium and coordinating mode of the secondary ligand in the ternary complexes.
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Chidambaram M V and Bhattacharya P K 1970J. Inorg. Nucl. Chem. 32 3271
Fischer B E and Sigel H 1974Z. Naturforsch. B29 654
Fischer B E and Sigel H 1975J. Inorg. Nucl. Chem. 37 2127
Fischer B E and Sigel H 1979Inorg. Chem. 18 425
Gopalkrishnan K and Bhattacharya P K 1982aJ. Chem. Soc., Dalton Trans. 353
Gopalkrishnan K and Bhattacharya P K 1982bJ. Chem. Soc., Dalton Trans. 543
Griesser R and Sigel H 1970Inorg. Chem. 9 1238
Griesser R and Sigel H 1971Inorg. Chem. 10 2229
Huber P R, Griesser R, Prijs B and Sigel H 1969Eur. J. Biochem. 10 238
Huber P R and Sigel H 1972Z. Naturforsch. B27 1319
Patel V K and Bhattacharya P K 1985Proc. Indian Acad. Sci. (Chem. Sci.) 94 495
Patel P J, Patel V K and Bhattacharya P K 1982aIndian J. Chem. A21 590
Patel P J, Patel V K and Bhattacharya P K 1982bInorg. Chem. 21 3163
Sayce I G 1968Talanta 15 1397
Sayce I G 1971Talanta 18 653
Sayce I G and Sharma V S 1972Talanta 19 831
Sigel H 1967Chimia 21 489
Sigel H 1980Inorg. Chem. 19 1411
Sigel H, Huber P R and Pasternack R F 1971Inorg. Chem. 10 2226
Walker F A, Sigel H and McCormic D B 1972Inorg. Chem. 11 2756
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Bhattacharya, P.K., Emanuel, N.A. & Kulkarni, N.D. Ternary complexes of substituted catechols and catecholamines. Proc. Indian Acad. Sci. (Chem. Sci.) 97, 529–534 (1986). https://doi.org/10.1007/BF02843497
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DOI: https://doi.org/10.1007/BF02843497