Kinetics and mechanism of the substitution reactions of some monofunctional Pt(II) complexes with heterocyclic nitrogen donor molecules. Crystal structure of [Pt(bpma)(pzBr)]Cl-2 center dot 2H(2)O
Нема приказа
Аутори
Kosović, MilicaJovanović, Snežana
Bogdanović, Goran A.
Giester, Gerald
Jacimovic, Zeljko
Bugarčić, Živadin D.
Petrović, Biljana
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
Substitution reactions of [Pt(terpy)Cl](+) (terpy=2,2;6,2-terpyridine), [Pt(bpma)Cl](+) (bpma=bis(2-pyridylmethyl)amine), [Pt(dien)Cl](+) (dien=diethylenetriamine or 1,5-diamino-3-azapentane) and [Pt(tpdm)Cl](+) (tpdm=tripyridinedimethane) with nitrogen donor heterocyclic molecules, such as 3-amino-4-iodo-pyrazole (pzI), 5-amino-4-bromo-3-methyl-pyrazole (pzBr) and imidazole (Im), were studied in aqueous 0.10M NaClO4 in the presence of 10mM NaCl using variable-temperature UV-vis spectrophotometry. The second-order rate constants k(2) indicate decrease in reactivity in the order [Pt(terpy)Cl](+) GT [Pt(bpma)Cl](+) GT [Pt(tpdm)Cl](+) GT [Pt(dien)Cl](+). The most reactive nucleophile among the heterocyclic compounds is imidazole, while pzI shows slightly higher reactivity than pzBr. Activation parameters were also determined and the negative values for entropies of activation, S, support an associative mode of substitution for all substitution processes. Crystal structure of [Pt(bpma)(pzB...r)]Cl(2)2H(2)O was determined by single-crystal X-ray analysis. The coordination geometry of the complex is distorted square-planar while the bond distance Pt-N2(pzBr) is longer than the other three Pt-N distances.
Кључне речи:
Pt(II) complexes / kinetics / mechanism / diazines / reactivity / deformed coordination geometry / crystal structureИзвор:
Journal of Coordination Chemistry, 2016, 69, 19, 2819-2831Финансирање / пројекти:
- Испитивање механизма реакција комплекса јона прелазних метала са биолошки значајним молекулима (RS-172011)
- Дизајнирање, синтеза, карактеризација и процена практичне примене координационих и органометалних једињења (RS-172014)
DOI: 10.1080/00958972.2016.1224336
ISSN: 0095-8972
WoS: 000384432400002
Scopus: 2-s2.0-84983541760
Колекције
Институција/група
VinčaTY - JOUR AU - Kosović, Milica AU - Jovanović, Snežana AU - Bogdanović, Goran A. AU - Giester, Gerald AU - Jacimovic, Zeljko AU - Bugarčić, Živadin D. AU - Petrović, Biljana PY - 2016 UR - https://vinar.vin.bg.ac.rs/handle/123456789/1253 AB - Substitution reactions of [Pt(terpy)Cl](+) (terpy=2,2;6,2-terpyridine), [Pt(bpma)Cl](+) (bpma=bis(2-pyridylmethyl)amine), [Pt(dien)Cl](+) (dien=diethylenetriamine or 1,5-diamino-3-azapentane) and [Pt(tpdm)Cl](+) (tpdm=tripyridinedimethane) with nitrogen donor heterocyclic molecules, such as 3-amino-4-iodo-pyrazole (pzI), 5-amino-4-bromo-3-methyl-pyrazole (pzBr) and imidazole (Im), were studied in aqueous 0.10M NaClO4 in the presence of 10mM NaCl using variable-temperature UV-vis spectrophotometry. The second-order rate constants k(2) indicate decrease in reactivity in the order [Pt(terpy)Cl](+) GT [Pt(bpma)Cl](+) GT [Pt(tpdm)Cl](+) GT [Pt(dien)Cl](+). The most reactive nucleophile among the heterocyclic compounds is imidazole, while pzI shows slightly higher reactivity than pzBr. Activation parameters were also determined and the negative values for entropies of activation, S, support an associative mode of substitution for all substitution processes. Crystal structure of [Pt(bpma)(pzBr)]Cl(2)2H(2)O was determined by single-crystal X-ray analysis. The coordination geometry of the complex is distorted square-planar while the bond distance Pt-N2(pzBr) is longer than the other three Pt-N distances. T2 - Journal of Coordination Chemistry T1 - Kinetics and mechanism of the substitution reactions of some monofunctional Pt(II) complexes with heterocyclic nitrogen donor molecules. Crystal structure of [Pt(bpma)(pzBr)]Cl-2 center dot 2H(2)O VL - 69 IS - 19 SP - 2819 EP - 2831 DO - 10.1080/00958972.2016.1224336 ER -
@article{ author = "Kosović, Milica and Jovanović, Snežana and Bogdanović, Goran A. and Giester, Gerald and Jacimovic, Zeljko and Bugarčić, Živadin D. and Petrović, Biljana", year = "2016", abstract = "Substitution reactions of [Pt(terpy)Cl](+) (terpy=2,2;6,2-terpyridine), [Pt(bpma)Cl](+) (bpma=bis(2-pyridylmethyl)amine), [Pt(dien)Cl](+) (dien=diethylenetriamine or 1,5-diamino-3-azapentane) and [Pt(tpdm)Cl](+) (tpdm=tripyridinedimethane) with nitrogen donor heterocyclic molecules, such as 3-amino-4-iodo-pyrazole (pzI), 5-amino-4-bromo-3-methyl-pyrazole (pzBr) and imidazole (Im), were studied in aqueous 0.10M NaClO4 in the presence of 10mM NaCl using variable-temperature UV-vis spectrophotometry. The second-order rate constants k(2) indicate decrease in reactivity in the order [Pt(terpy)Cl](+) GT [Pt(bpma)Cl](+) GT [Pt(tpdm)Cl](+) GT [Pt(dien)Cl](+). The most reactive nucleophile among the heterocyclic compounds is imidazole, while pzI shows slightly higher reactivity than pzBr. Activation parameters were also determined and the negative values for entropies of activation, S, support an associative mode of substitution for all substitution processes. Crystal structure of [Pt(bpma)(pzBr)]Cl(2)2H(2)O was determined by single-crystal X-ray analysis. The coordination geometry of the complex is distorted square-planar while the bond distance Pt-N2(pzBr) is longer than the other three Pt-N distances.", journal = "Journal of Coordination Chemistry", title = "Kinetics and mechanism of the substitution reactions of some monofunctional Pt(II) complexes with heterocyclic nitrogen donor molecules. Crystal structure of [Pt(bpma)(pzBr)]Cl-2 center dot 2H(2)O", volume = "69", number = "19", pages = "2819-2831", doi = "10.1080/00958972.2016.1224336" }
Kosović, M., Jovanović, S., Bogdanović, G. A., Giester, G., Jacimovic, Z., Bugarčić, Ž. D.,& Petrović, B.. (2016). Kinetics and mechanism of the substitution reactions of some monofunctional Pt(II) complexes with heterocyclic nitrogen donor molecules. Crystal structure of [Pt(bpma)(pzBr)]Cl-2 center dot 2H(2)O. in Journal of Coordination Chemistry, 69(19), 2819-2831. https://doi.org/10.1080/00958972.2016.1224336
Kosović M, Jovanović S, Bogdanović GA, Giester G, Jacimovic Z, Bugarčić ŽD, Petrović B. Kinetics and mechanism of the substitution reactions of some monofunctional Pt(II) complexes with heterocyclic nitrogen donor molecules. Crystal structure of [Pt(bpma)(pzBr)]Cl-2 center dot 2H(2)O. in Journal of Coordination Chemistry. 2016;69(19):2819-2831. doi:10.1080/00958972.2016.1224336 .
Kosović, Milica, Jovanović, Snežana, Bogdanović, Goran A., Giester, Gerald, Jacimovic, Zeljko, Bugarčić, Živadin D., Petrović, Biljana, "Kinetics and mechanism of the substitution reactions of some monofunctional Pt(II) complexes with heterocyclic nitrogen donor molecules. Crystal structure of [Pt(bpma)(pzBr)]Cl-2 center dot 2H(2)O" in Journal of Coordination Chemistry, 69, no. 19 (2016):2819-2831, https://doi.org/10.1080/00958972.2016.1224336 . .