Kinetics and mechanism of complex-formation reactions of ammonia and methylamine with copper(II) complexes in aqueous solution

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The complex-formation kinetics of copper(II) complexes with ammonia and methylamine was investigated by the temperature-jump relaxation technique. At 2 mol dm-3 ionic strength the forward rate constants (dm3 mol-1 s-1) for the studied reactions are: [Cu(NH3)]2+ + NH3 ⇌ [Cu(NH3)2]2+, (1.2 ± 0.1) × 108 (7°C); [Cu(ida)] + NH3 ⇌ [Cu(ida)(NH3)], (3.7 ± 0.3) × 108; [Cu(ida)] + NMeH2 ⇌ [Cu(ida)(NMeH2)], (8.7 ± 0.3) × 107; [Cu(mida)] + NMeH2 ⇌ [Cu(mida)(NMeH2)]. (5.4 ± 0.3) × 107 (25°C); ida = iminodiacetate, mida = N-methyliminodiacetate. The results presented and those from previous literature strongly suggest that specific interactions between the co-ordinated groups and the central metal ion do not modify the kinetics and mechanism of the complex formation. The kinetic data are consistent with the Eigen-Wilkins mechanism.

Original languageEnglish
Pages (from-to)1355-1358
Number of pages4
JournalJournal of the Chemical Society, Dalton Transactions
Issue number9
DOIs
Publication statusPublished - 1994

Fingerprint

Ammonia
Copper
Kinetics
Ionic strength
Metal ions
Rate constants
methylamine
Temperature

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

@article{7dd134e00b394092887de51b36580bb4,
title = "Kinetics and mechanism of complex-formation reactions of ammonia and methylamine with copper(II) complexes in aqueous solution",
abstract = "The complex-formation kinetics of copper(II) complexes with ammonia and methylamine was investigated by the temperature-jump relaxation technique. At 2 mol dm-3 ionic strength the forward rate constants (dm3 mol-1 s-1) for the studied reactions are: [Cu(NH3)]2+ + NH3 ⇌ [Cu(NH3)2]2+, (1.2 ± 0.1) × 108 (7°C); [Cu(ida)] + NH3 ⇌ [Cu(ida)(NH3)], (3.7 ± 0.3) × 108; [Cu(ida)] + NMeH2 ⇌ [Cu(ida)(NMeH2)], (8.7 ± 0.3) × 107; [Cu(mida)] + NMeH2 ⇌ [Cu(mida)(NMeH2)]. (5.4 ± 0.3) × 107 (25°C); ida = iminodiacetate, mida = N-methyliminodiacetate. The results presented and those from previous literature strongly suggest that specific interactions between the co-ordinated groups and the central metal ion do not modify the kinetics and mechanism of the complex formation. The kinetic data are consistent with the Eigen-Wilkins mechanism.",
author = "I. F{\'a}bi{\'a}n",
year = "1994",
doi = "10.1039/DT9940001355",
language = "English",
pages = "1355--1358",
journal = "Dalton Transactions",
issn = "1472-7773",
publisher = "Royal Society of Chemistry",
number = "9",

}

TY - JOUR

T1 - Kinetics and mechanism of complex-formation reactions of ammonia and methylamine with copper(II) complexes in aqueous solution

AU - Fábián, I.

PY - 1994

Y1 - 1994

N2 - The complex-formation kinetics of copper(II) complexes with ammonia and methylamine was investigated by the temperature-jump relaxation technique. At 2 mol dm-3 ionic strength the forward rate constants (dm3 mol-1 s-1) for the studied reactions are: [Cu(NH3)]2+ + NH3 ⇌ [Cu(NH3)2]2+, (1.2 ± 0.1) × 108 (7°C); [Cu(ida)] + NH3 ⇌ [Cu(ida)(NH3)], (3.7 ± 0.3) × 108; [Cu(ida)] + NMeH2 ⇌ [Cu(ida)(NMeH2)], (8.7 ± 0.3) × 107; [Cu(mida)] + NMeH2 ⇌ [Cu(mida)(NMeH2)]. (5.4 ± 0.3) × 107 (25°C); ida = iminodiacetate, mida = N-methyliminodiacetate. The results presented and those from previous literature strongly suggest that specific interactions between the co-ordinated groups and the central metal ion do not modify the kinetics and mechanism of the complex formation. The kinetic data are consistent with the Eigen-Wilkins mechanism.

AB - The complex-formation kinetics of copper(II) complexes with ammonia and methylamine was investigated by the temperature-jump relaxation technique. At 2 mol dm-3 ionic strength the forward rate constants (dm3 mol-1 s-1) for the studied reactions are: [Cu(NH3)]2+ + NH3 ⇌ [Cu(NH3)2]2+, (1.2 ± 0.1) × 108 (7°C); [Cu(ida)] + NH3 ⇌ [Cu(ida)(NH3)], (3.7 ± 0.3) × 108; [Cu(ida)] + NMeH2 ⇌ [Cu(ida)(NMeH2)], (8.7 ± 0.3) × 107; [Cu(mida)] + NMeH2 ⇌ [Cu(mida)(NMeH2)]. (5.4 ± 0.3) × 107 (25°C); ida = iminodiacetate, mida = N-methyliminodiacetate. The results presented and those from previous literature strongly suggest that specific interactions between the co-ordinated groups and the central metal ion do not modify the kinetics and mechanism of the complex formation. The kinetic data are consistent with the Eigen-Wilkins mechanism.

UR - http://www.scopus.com/inward/record.url?scp=37049068768&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=37049068768&partnerID=8YFLogxK

U2 - 10.1039/DT9940001355

DO - 10.1039/DT9940001355

M3 - Article

AN - SCOPUS:37049068768

SP - 1355

EP - 1358

JO - Dalton Transactions

JF - Dalton Transactions

SN - 1472-7773

IS - 9

ER -