872415-76-4Relevant academic research and scientific papers
Selective oxidation of (porphyrinato)iridium(III) arylethyls by nitroxide: Evidence for stabilization of carbon-centered Ir-CH2-CHR radicals by iridium
Yeung, Siu Kwan,Chan, Kin Shing
, p. 6426 - 6430 (2008/10/09)
(Arylethyl)iridium(III) porphyrins were oxidized selectively with excess 2,2,6,6-tetramethylpiperidinoxy (TEMPO) at the benzylic positions to yield (2-aryl-2-oxoethyl)iridium porphyrins. Other alkyl- and PhCH2CH 2CH2-substituted iridium porphyrins did not react or gave complex mixtures and low yields of indium methyl. The proposed intermediate of the carbon-centered IrIII(CH2CHR) radical is probably stabilized by the β iridium center, allowing the (slipped) olefin metalloradical complex IrII(CH2=CHR) as a reasonable resonance structure.
