Substituent effects on ESR parameters of α-phenyl-N-tert-butylnitrone spin adducts. Resolution enhancement and mass spectrometry

✍ Scribed by Kai Pan; Chiou-Rong Lin; Tong-Ing Ho

• Publisher: John Wiley and Sons
• Year: 1993
• Tongue: English
• Weight: 506 KB
• Volume: 31
• Category: Article
• ISSN: 0749-1581
• DOI: 10.1002/mrc.1260310705

✦ Synopsis

Abstract

The combination of high‐performance liquid chromatography (HPLC) and ESR spectrometry was used to isolate the free radicals produced by the reaction of a Grignard reagent with 15 substituted α‐Phenyl‐N‐tert‐butylnitrone. Long‐range hyperfine splitting constants (hfsc) were obtained by the resolution enhancement method. Linear correlation studies between hfsc and Hammett σ~p~ constants are reported. Dual‐parameter correlations using σ~R~ and σ~I~ were also studied. The mass spectra for the HPLC‐isolated spin adducts and their fragmentation patterns are reported.