Formation of Charge‐Transfer Complexes of Penicillins with Iodine

Abstract
Benzylpenicillin, benzathine benzylpenicillin, procaine benzylpenicillin, anhydrous ampicillin and sodium ampicillin form charge‐transfer complexes with iodine in 1,2‐dichloroethane, which were examined by UV, FIR, 1H‐NMR, 13C‐NMR, and 15N‐NMR spectroscopy.