Journal article
Cyclopentadienyl Complexes of Ir-III for Attempted C-D Bond Activation
European journal of inorganic chemistry
28 Jul 2023
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
The complexes Cp(MeIm)IrI2 and Cp-Me4(MeIm)IrCl2 have been prepared and subsequently methylated to form Cp(MeIm)IrMe2 and Cp-Me4(MeIm)IrMe2 (Cp=& eta;(5)-C5H5, Cp-Me4=& eta;(5)-C5HMe4, MeIm=1,3-dimethylimidazol-2-ylidene). We attempted unsuccessfully to use the dimethyl complexes to study C-D bond activation via methyl-group abstraction. Protonation with one equivalent of a weak acid, such as 2,6-dimethylpyridinium chloride, affords methane and Ir-III methyl chloride complexes. H-1-NMR experiments show addition of pyridinium [BArF20](-) (BArF20=[B(C6F5)(4)](-)) to the dimethyl species forms [Cp(MeIm)IrMe(py)](+)[BArF20](-) (py=pyridine) or [Cp-Me4(MeIm)IrMe(py)](+)[BArF20](-) respectively, alongside methane, while use of the [BArF20](-) salts of more bulky 2,6-dimethylpyridinium and 2,6-di-tert-butylpyridinium gave an intractable mixture. Likewise, the generation of 16 e(-) species [Cp-Me4(MeIm)IrMe](+)[BArF20](-) or [Cp(MeIm)IrMe](+)[BarF(20)](-) at low temperature using 2,6-dimethylpyridinium or 2,6-di-tert-butylpyridinium in thawing C6D6 or toluene-d(8) formed an intractable mixture and did not lead to C-D bond activation. X-ray structures of several Ir-III complexes show similar sterics as that found for the previously reported Cp* analogue.
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Details
- Title
- Cyclopentadienyl Complexes of Ir-III for Attempted C-D Bond Activation
- Creators
- Robert D. Robinson Jr - Collin Coll, Dept Chem, Preston Ridge Campus, Frisco, TX 75035 USAWerner Kaminsky - University of WashingtonJeremiah J. Scepaniak - Drexel University
- Publication Details
- European journal of inorganic chemistry
- Publisher
- Wiley
- Number of pages
- 9
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Chemistry
- Web of Science ID
- WOS:001037861100001
- Scopus ID
- 2-s2.0-85166013809
- Other Identifier
- 991020902864804721
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- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Chemistry, Inorganic & Nuclear