caa a22 4500 465775403 CHVBK 20180323111940.0 cr unu---uuuuu 170327e19901201xx s 000 0 eng 10.1007/BF01040767 doi (NATIONALLICENCE)springer-10.1007/BF01040767 Ion pairing effect on the aquation kínetics of [Co(Py)4Cl2]X (X=Cl−, NO3−, IO4−, ClO4− SCN− and N3−) in different solvent systems; basicity measurement of the counter ion [Elektronische Daten] [Zerihoun Kebede, Negusie Retta] Summary: The aquation kinetics of [Co(Py)4Cl2]X salts (X=Cl−, NO 3 − , IO 4 − , ClO 4 − , SCN− and N 3 − ) in EtOH/H2O have been widely investigated over a range of solvent compositions. Similarly, the aquation rate constants were determined in aqueous solution (1∶1 v/v) containing other organic solvents. The study reveals the existence of specine solvation of the activated complex and that the rate constant associated with the rate-determining step of the reaction depends to some extent on the ionizing power of the medium. The influence of the counter ions on the aquation rate is also discussed. Basicity, the capacity of the nucleophiles to abstract the exchangeable proton from a titanium selenite inorganic exchanger was found to follow the order: SCN−<NO 3 − <Cl−<ClO 4 − <IO 4 − <N 3 − . Chapman and Hall Ltd, 1990 Kebede Zerihoun Department of Chemistry, Addis Ababa University, P.O. Box 1176, Addis Ababa, Ethiopia aut Retta Negusie Department of Chemistry, Addis Ababa University, P.O. Box 1176, Addis Ababa, Ethiopia aut Transition Metal Chemistry Kluwer Academic Publishers 15/6(1990-12-01), 417-420 0340-4285 15:6<417 1990 15 11243 https://doi.org/10.1007/BF01040767 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF01040767 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kebede Zerihoun Department of Chemistry, Addis Ababa University, P.O. Box 1176, Addis Ababa, Ethiopia aut NATIONALLICENCE 700 1- Retta Negusie Department of Chemistry, Addis Ababa University, P.O. Box 1176, Addis Ababa, Ethiopia aut NATIONALLICENCE 773 0- Transition Metal Chemistry Kluwer Academic Publishers 15/6(1990-12-01), 417-420 0340-4285 15:6<417 1990 15 11243 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer