Ligand scrambling reactions of cyano(thione)gold(I) complexes and determination of their equilibrium constants

Saeed Ahmad; Anvarhusein A. Isab; Herman P. Perzanowski

doi:10.1139/v02-165

Ligand scrambling reactions of cyano(thione)gold(I) complexes and determination of their equilibrium constants

Saeed Ahmad
, Anvarhusein A. Isab^*
, Herman P. Perzanowski

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

71 Scopus citations

Abstract

Ligand scrambling reactions in cyano(thione)gold(I) complexes ([>C=S-Au-CN]) to form [Au(>C=S)₂]⁺ and [Au(CN)₂]^- species have been investigated for a series of thiones in DMSO using ¹³C and ¹⁵N NMR spectroscopy. Rapid approach to equilibrium occurred and resulted in distinct signals for the [>C=S-Au-CN] and [Au(CN)₂]^- complexes, both in ¹³C and ¹⁵N NMR. Equilibrium constants (K_eq) were determined for scrambling of all the complexes by integrating the CN resonances in the ¹³C NMR recorded at 298 K. The influence of various factors (initial concentration, ionic strength, temperature, and solvent polarity) on the K_eq value was examined for a representative complex (ImtAuCN (Imt = Imidazolidine-2-thione)).

Original language	English
Pages (from-to)	1279-1284
Number of pages	6
Journal	Canadian Journal of Chemistry
Volume	80
Issue number	10
DOIs	https://doi.org/10.1139/v02-165
State	Published - 2002

Keywords

Cyanogold(I) complexes
K
Ligand scrambling
NMR
Thiones

ASJC Scopus subject areas

Catalysis
General Chemistry
Organic Chemistry

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title = "Ligand scrambling reactions of cyano(thione)gold(I) complexes and determination of their equilibrium constants",

abstract = "Ligand scrambling reactions in cyano(thione)gold(I) complexes ([>C=S-Au-CN]) to form [Au(>C=S)2]+ and [Au(CN)2]- species have been investigated for a series of thiones in DMSO using 13C and 15N NMR spectroscopy. Rapid approach to equilibrium occurred and resulted in distinct signals for the [>C=S-Au-CN] and [Au(CN)2]- complexes, both in 13C and 15N NMR. Equilibrium constants (Keq) were determined for scrambling of all the complexes by integrating the CN resonances in the 13C NMR recorded at 298 K. The influence of various factors (initial concentration, ionic strength, temperature, and solvent polarity) on the Keq value was examined for a representative complex (ImtAuCN (Imt = Imidazolidine-2-thione)).",

keywords = "Cyanogold(I) complexes, K, Ligand scrambling, NMR, Thiones",

author = "Saeed Ahmad and Isab, \{Anvarhusein A.\} and Perzanowski, \{Herman P.\}",

year = "2002",

doi = "10.1139/v02-165",

language = "English",

volume = "80",

pages = "1279--1284",

journal = "Canadian Journal of Chemistry",

issn = "0008-4042",

number = "10",

}

TY - JOUR

T1 - Ligand scrambling reactions of cyano(thione)gold(I) complexes and determination of their equilibrium constants

AU - Ahmad, Saeed

AU - Isab, Anvarhusein A.

AU - Perzanowski, Herman P.

PY - 2002

Y1 - 2002

N2 - Ligand scrambling reactions in cyano(thione)gold(I) complexes ([>C=S-Au-CN]) to form [Au(>C=S)2]+ and [Au(CN)2]- species have been investigated for a series of thiones in DMSO using 13C and 15N NMR spectroscopy. Rapid approach to equilibrium occurred and resulted in distinct signals for the [>C=S-Au-CN] and [Au(CN)2]- complexes, both in 13C and 15N NMR. Equilibrium constants (Keq) were determined for scrambling of all the complexes by integrating the CN resonances in the 13C NMR recorded at 298 K. The influence of various factors (initial concentration, ionic strength, temperature, and solvent polarity) on the Keq value was examined for a representative complex (ImtAuCN (Imt = Imidazolidine-2-thione)).

AB - Ligand scrambling reactions in cyano(thione)gold(I) complexes ([>C=S-Au-CN]) to form [Au(>C=S)2]+ and [Au(CN)2]- species have been investigated for a series of thiones in DMSO using 13C and 15N NMR spectroscopy. Rapid approach to equilibrium occurred and resulted in distinct signals for the [>C=S-Au-CN] and [Au(CN)2]- complexes, both in 13C and 15N NMR. Equilibrium constants (Keq) were determined for scrambling of all the complexes by integrating the CN resonances in the 13C NMR recorded at 298 K. The influence of various factors (initial concentration, ionic strength, temperature, and solvent polarity) on the Keq value was examined for a representative complex (ImtAuCN (Imt = Imidazolidine-2-thione)).

KW - Cyanogold(I) complexes

KW - K

KW - Ligand scrambling

KW - NMR

KW - Thiones

UR - https://www.scopus.com/pages/publications/0036924987

U2 - 10.1139/v02-165

DO - 10.1139/v02-165

M3 - Article

AN - SCOPUS:0036924987

SN - 0008-4042

VL - 80

SP - 1279

EP - 1284

JO - Canadian Journal of Chemistry

JF - Canadian Journal of Chemistry

IS - 10

ER -

Ligand scrambling reactions of cyano(thione)gold(I) complexes and determination of their equilibrium constants

Abstract

Keywords

ASJC Scopus subject areas

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