Lewis acid adducts (BH sub 3 , Me sup + , and Et sup + ) of the. eta. sup 4 and. eta. sup 2 isomers of Cp sup * Ir(thiophene)

Journal Article · Thu Mar 01 04:00:00 EST 1990 · Organometallics; (USA)

DOI:https://doi.org/10.1021/om00117a048· OSTI ID:6330795

Chen, Jiabi; Angelici, R J ^[1]

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1. Iowa State Univ., Ames (USA)

The {eta}{sup 4}-thiophene complex Cp{sup *}Ir({eta}{sup 4}-2,5-Me{sub 2}T) (2), where 2,5-Me{sub 2} is 2,5-dimethylthiophene, reacts with Me{sub 2}S{center dot}BH{sub 3} to give the BH{sub 3} adduct Cp{sup *}Ir({eta}{sup 4}-2,5-Me{sub 2}T{center dot}BH{sub 3}) (6), demonstrating the unusually high basicity of the sulfur in 2 as compared with that in Me{sub 2}S. Basic amines remove the BH{sub 3} in 6 to give 2. Surprisingly, the isomer Cp{sup *}Ir({eta}{sup 2}-2,5-Me{sub 2}T) (4) also reacts with Me{sub 2}S{center dot}BH to give 6. The 2-methylthiophene analogues of 2 and 4 react similarly to give Cp{sup *}Ir({eta}{sup 4}-2-MeT{center dot}BH{sub 3}) (5), whose structure was determined by X-ray diffraction. Complex 2 also reacts with R{sub 3}O{sup +} (R = Me, Et) to give the S-alkylated thiophene complexes Cp{sup *}Ir({eta}{sup 4}-2,5-Me{sub 2}T-R){sup +}.

• DOE Contract Number: W-7405-ENG-82
• OSTI ID: 6330795
• Journal Information: Organometallics; (USA), Journal Name: Organometallics; (USA) Vol. 9:3; ISSN 0276-7333; ISSN ORGND
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ADDUCTS
BORON COMPOUNDS
BORON HYDRIDES
CATALYSIS
COMPLEXES
CRYSTAL STRUCTURE
DATA
DATA ANALYSIS
EXPERIMENTAL DATA
HETEROCYCLIC COMPOUNDS
HETEROGENEOUS CATALYSIS
HYDRIDES
HYDROGEN COMPOUNDS
INFORMATION
INORGANIC ACIDS
IRIDIUM COMPLEXES
LEWIS ACIDS
MEASURING INSTRUMENTS
MEASURING METHODS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
SYNTHESIS
THIOPHENE
TRANSITION ELEMENT COMPLEXES