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

Mai Kotera; Takayoshi Suzuki

doi:10.1016/j.ica.2010.05.053

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

Mai Kotera, Takayoshi Suzuki

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

3 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 Ir^III 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 language	English
Pages (from-to)	3602-3605
Number of pages	4
Journal	Inorganica Chimica Acta
Volume	363
Issue number	13
DOIs	https://doi.org/10.1016/j.ica.2010.05.053
Publication status	Published - Oct 25 2010

Keywords

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

ASJC Scopus subject areas

Physical and Theoretical Chemistry
Inorganic Chemistry
Materials Chemistry

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10.1016/j.ica.2010.05.053

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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",

note = "Funding Information: This work was supported by a Grant-in-Aid for Scientific Research Nos. 16550055 and 20550064 from the Ministry of Education, Culture, Sports, Science, and Technology, Japan . ",

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AU - Kotera, Mai

AU - Suzuki, Takayoshi

N1 - Funding Information: This work was supported by a Grant-in-Aid for Scientific Research Nos. 16550055 and 20550064 from the Ministry of Education, Culture, Sports, Science, and Technology, Japan .

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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.

KW - Benzimidazoline-2-thione

KW - Bridging modes

KW - Iridium(III) complexes

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

Abstract

Keywords

ASJC Scopus subject areas

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