naa a22 4500 510734049 CHVBK 20180411083003.0 cr unu---uuuuu 180411e20130501xx s 000 0 eng 10.1007/s12039-013-0414-x doi (NATIONALLICENCE)springer-10.1007/s12039-013-0414-x SHOUKRY AZZA Department of Chemistry, Faculty of Science, Cairo University, 12613, Giza, Egypt aut Kinetics and mechanism for the substitution reactions of monoaquamonochloro-(piperazine) palladium (II) complex with L-methionine and thiourea in aqueous solution [Elektronische Daten] [AZZA SHOUKRY] The interaction of the palladium(II) complex [Pd(Pip)Cl(H2O)] + , where Pip is piperazine, with the sulphur donor nucleophiles; L-methionine (L-Met), and thiourea (tu) was studied under pseudo-first-order conditions as a function of nucleophile concentration and temperature, using UV-Visible spectrophotometric and stopped-flow techniques. Two consecutive reaction steps were observed for the substitution process with L-methionine. For the substitution with thiourea, a third reaction step, the displacement of the labilized amine, as a result of the strong trans-effect of thiourea ligand was observed. 1HNMR spectroscopy was used to follow the substitution of the ligand by thiourea. The activation parameters for all reactions studied suggest an associative substitution mechanism. Graphical Abstract The interaction of the monoaquamonochloro-(piperazine) Palladium (II) complex [Pd(Pip)Cl(H2O)] + , where Pip is piperazine, with the sulphur donor nucleophiles; L-methionine (L-Met), and thiourea (tu) was studied under pseudo-first-order conditions as a function of nucleophile concentration and temperature, using UV-Visible spectrophotometric and stopped-flow techniques. Two consecutive reaction steps were observed for the substitution process with L- methionine. For the substitution with thiourea, three reaction steps were observed. Indian Academy of Sciences, 2013 Palladium (II) nationallicence piperazine nationallicence sulphur donor nucleophiles nationallicence stopped-flow spectrophotometry nationallicence activation parameters nationallicence Journal of Chemical Sciences Springer-Verlag 125/3(2013-05-01), 643-651 0974-3626 125:3<643 2013 125 12039 https://doi.org/10.1007/s12039-013-0414-x text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s12039-013-0414-x text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- SHOUKRY AZZA Department of Chemistry, Faculty of Science, Cairo University, 12613, Giza, Egypt aut NATIONALLICENCE 773 0- Journal of Chemical Sciences Springer-Verlag 125/3(2013-05-01), 643-651 0974-3626 125:3<643 2013 125 12039 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer