Characterization and oxidative addition reactions of different rhodium and iridium triazolato complexes

Alfred J. Muller; J. Conradie; Walter Purcell; Stephen S. Basson; Johan A. Venter

Characterization and oxidative addition reactions of different rhodium and iridium triazolato complexes

Alfred J. Muller, J. Conradie, Walter Purcell, Stephen S. Basson, Johan A. Venter

University of The Free State

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

11 Citations (Scopus)

Abstract

A number of different rhodium(I) and iridium(I) triazolato complexes and their oxidative addition products (triazolate = 3,5-bis(pyridine-2-yl)-1,2,4- triazolate (bpt^-) and 4-amino-3,5-bis(pyridine-2-yl)-1,2,4-triazolate (bpt-NH^-)) were prepared and characterized by means of IR and ¹H NMR spectroscopy, elemental analysis and computational chemistry methods. The oxidative addition reactions of these complexes with iodomethane in different solvents indicated simple second-order kinetics with the faster reactions in the more polar solvents (1.44(7) × 10^-2 L mo ^-1 s^-1 in dichloromethane compared with 9.2(5) × 10^-4 L mol^-1 s^-1 in benzene for iridium bpt-NH). ¹H NMR data and density functional theory calculations illustrate that the coordination of the metal centre in [M(bpt-NH)(cod)] (M = Rh or Ir) occurs via the amine moiety and a nitrogen of a pyridine ring.

Original language	English
Pages (from-to)	11-19
Number of pages	9
Journal	South African Journal of Chemistry
Volume	63
Publication status	Published - 2010
Externally published	Yes

Keywords

Cyclooctadiene
DFT
Iridium(I)
Methyl iodide
Oxidative addition
Rhodium(I)
Triazole

ASJC Scopus subject areas

General Chemistry

Cite this

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title = "Characterization and oxidative addition reactions of different rhodium and iridium triazolato complexes",

abstract = "A number of different rhodium(I) and iridium(I) triazolato complexes and their oxidative addition products (triazolate = 3,5-bis(pyridine-2-yl)-1,2,4- triazolate (bpt-) and 4-amino-3,5-bis(pyridine-2-yl)-1,2,4-triazolate (bpt-NH-)) were prepared and characterized by means of IR and 1H NMR spectroscopy, elemental analysis and computational chemistry methods. The oxidative addition reactions of these complexes with iodomethane in different solvents indicated simple second-order kinetics with the faster reactions in the more polar solvents (1.44(7) × 10-2 L mo -1 s-1 in dichloromethane compared with 9.2(5) × 10-4 L mol-1 s-1 in benzene for iridium bpt-NH). 1H NMR data and density functional theory calculations illustrate that the coordination of the metal centre in [M(bpt-NH)(cod)] (M = Rh or Ir) occurs via the amine moiety and a nitrogen of a pyridine ring.",

keywords = "Cyclooctadiene, DFT, Iridium(I), Methyl iodide, Oxidative addition, Rhodium(I), Triazole",

author = "Muller, {Alfred J.} and J. Conradie and Walter Purcell and Basson, {Stephen S.} and Venter, {Johan A.}",

year = "2010",

language = "English",

volume = "63",

pages = "11--19",

journal = "South African Journal of Chemistry",

issn = "0379-4350",

publisher = "Bureau for Scientific Publications",

}

TY - JOUR

T1 - Characterization and oxidative addition reactions of different rhodium and iridium triazolato complexes

AU - Muller, Alfred J.

AU - Conradie, J.

AU - Purcell, Walter

AU - Basson, Stephen S.

AU - Venter, Johan A.

PY - 2010

Y1 - 2010

N2 - A number of different rhodium(I) and iridium(I) triazolato complexes and their oxidative addition products (triazolate = 3,5-bis(pyridine-2-yl)-1,2,4- triazolate (bpt-) and 4-amino-3,5-bis(pyridine-2-yl)-1,2,4-triazolate (bpt-NH-)) were prepared and characterized by means of IR and 1H NMR spectroscopy, elemental analysis and computational chemistry methods. The oxidative addition reactions of these complexes with iodomethane in different solvents indicated simple second-order kinetics with the faster reactions in the more polar solvents (1.44(7) × 10-2 L mo -1 s-1 in dichloromethane compared with 9.2(5) × 10-4 L mol-1 s-1 in benzene for iridium bpt-NH). 1H NMR data and density functional theory calculations illustrate that the coordination of the metal centre in [M(bpt-NH)(cod)] (M = Rh or Ir) occurs via the amine moiety and a nitrogen of a pyridine ring.

AB - A number of different rhodium(I) and iridium(I) triazolato complexes and their oxidative addition products (triazolate = 3,5-bis(pyridine-2-yl)-1,2,4- triazolate (bpt-) and 4-amino-3,5-bis(pyridine-2-yl)-1,2,4-triazolate (bpt-NH-)) were prepared and characterized by means of IR and 1H NMR spectroscopy, elemental analysis and computational chemistry methods. The oxidative addition reactions of these complexes with iodomethane in different solvents indicated simple second-order kinetics with the faster reactions in the more polar solvents (1.44(7) × 10-2 L mo -1 s-1 in dichloromethane compared with 9.2(5) × 10-4 L mol-1 s-1 in benzene for iridium bpt-NH). 1H NMR data and density functional theory calculations illustrate that the coordination of the metal centre in [M(bpt-NH)(cod)] (M = Rh or Ir) occurs via the amine moiety and a nitrogen of a pyridine ring.

KW - Cyclooctadiene

KW - DFT

KW - Iridium(I)

KW - Methyl iodide

KW - Oxidative addition

KW - Rhodium(I)

KW - Triazole

UR - http://www.scopus.com/inward/record.url?scp=77953736270&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:77953736270

SN - 0379-4350

VL - 63

SP - 11

EP - 19

JO - South African Journal of Chemistry

JF - South African Journal of Chemistry

ER -

Characterization and oxidative addition reactions of different rhodium and iridium triazolato complexes

Abstract

Keywords

ASJC Scopus subject areas

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