Syntheses and crystal structures of mononuclear and dinuclear (pentamethylcyclopentadienyl)iridium(III) complexes containing 2-mercaptobenzimidazole

Mai Kotera, Takayoshi Suzuki

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

A reaction of [Cp*IrCl2]2 {Cp* = η5-C5(CH3)5} and 2-mercaptobenzimidazole (H2bimt) in methanol in a 1:2 molar ratio gave a yellow complex of [Cp*IrCl2(H2bimt)] ·CH3OH (1). In compound 1 the H2bimt acts as a monodentately S-donating (κS) ligand. A similar reaction of [Cp*IrCl2]2 and H2bimt in the presence of NaOCH3 (molar ratio of 1:2:2) gave an orange product (2) on addition of excess amount of NH4PF6. Compound 2 was composed of an unsymmetrical dinuclear complex cation, [(Cp*IrCl)2(μ- Hbimt)(μ-H2bimt)]+, a PF6- anion, and water molecules of crystallization. In the complex cation, H 2bimt bridges two IrIII centers by S atom in the μ-κS:κS mode, while the monodeprotonated Hbimt- ligand bridges via S and N atoms in the μ-κS:κN1 mode.

Original languageEnglish
Pages (from-to)3602-3605
Number of pages4
JournalInorganica Chimica Acta
Volume363
Issue number13
DOIs
Publication statusPublished - Oct 25 2010

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Iridium
iridium
Cations
Crystal structure
Positive ions
Ligands
cations
Atoms
ligands
crystal structure
synthesis
Crystallization
Anions
Methanol
atoms
Negative ions
methyl alcohol
crystallization
anions
Molecules

Keywords

  • Benzimidazoline-2-thione
  • Bridging modes
  • Iridium(III) complexes

ASJC Scopus subject areas

  • Inorganic Chemistry
  • Physical and Theoretical Chemistry
  • Materials Chemistry

Cite this

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title = "Syntheses and crystal structures of mononuclear and dinuclear (pentamethylcyclopentadienyl)iridium(III) complexes containing 2-mercaptobenzimidazole",
abstract = "A reaction of [Cp*IrCl2]2 {Cp* = η5-C5(CH3)5} and 2-mercaptobenzimidazole (H2bimt) in methanol in a 1:2 molar ratio gave a yellow complex of [Cp*IrCl2(H2bimt)] ·CH3OH (1). In compound 1 the H2bimt acts as a monodentately S-donating (κS) ligand. A similar reaction of [Cp*IrCl2]2 and H2bimt in the presence of NaOCH3 (molar ratio of 1:2:2) gave an orange product (2) on addition of excess amount of NH4PF6. Compound 2 was composed of an unsymmetrical dinuclear complex cation, [(Cp*IrCl)2(μ- Hbimt)(μ-H2bimt)]+, a PF6- anion, and water molecules of crystallization. In the complex cation, H 2bimt bridges two IrIII centers by S atom in the μ-κS:κS mode, while the monodeprotonated Hbimt- ligand bridges via S and N atoms in the μ-κS:κN1 mode.",
keywords = "Benzimidazoline-2-thione, Bridging modes, Iridium(III) complexes",
author = "Mai Kotera and Takayoshi Suzuki",
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AU - Suzuki, Takayoshi

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N2 - A reaction of [Cp*IrCl2]2 {Cp* = η5-C5(CH3)5} and 2-mercaptobenzimidazole (H2bimt) in methanol in a 1:2 molar ratio gave a yellow complex of [Cp*IrCl2(H2bimt)] ·CH3OH (1). In compound 1 the H2bimt acts as a monodentately S-donating (κS) ligand. A similar reaction of [Cp*IrCl2]2 and H2bimt in the presence of NaOCH3 (molar ratio of 1:2:2) gave an orange product (2) on addition of excess amount of NH4PF6. Compound 2 was composed of an unsymmetrical dinuclear complex cation, [(Cp*IrCl)2(μ- Hbimt)(μ-H2bimt)]+, a PF6- anion, and water molecules of crystallization. In the complex cation, H 2bimt bridges two IrIII centers by S atom in the μ-κS:κS mode, while the monodeprotonated Hbimt- ligand bridges via S and N atoms in the μ-κS:κN1 mode.

AB - A reaction of [Cp*IrCl2]2 {Cp* = η5-C5(CH3)5} and 2-mercaptobenzimidazole (H2bimt) in methanol in a 1:2 molar ratio gave a yellow complex of [Cp*IrCl2(H2bimt)] ·CH3OH (1). In compound 1 the H2bimt acts as a monodentately S-donating (κS) ligand. A similar reaction of [Cp*IrCl2]2 and H2bimt in the presence of NaOCH3 (molar ratio of 1:2:2) gave an orange product (2) on addition of excess amount of NH4PF6. Compound 2 was composed of an unsymmetrical dinuclear complex cation, [(Cp*IrCl)2(μ- Hbimt)(μ-H2bimt)]+, a PF6- anion, and water molecules of crystallization. In the complex cation, H 2bimt bridges two IrIII centers by S atom in the μ-κS:κS mode, while the monodeprotonated Hbimt- ligand bridges via S and N atoms in the μ-κS:κN1 mode.

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