SYNTHESES with fluorocarbon iodides all involve homolysis (radical-atomic, sometimes anion-anionic) of the RF-I bond, for weak and medium nucleophiles do not replace iodide ion, and strong ones (eg, thiophenoxide ion) abstract positive iodine1 (RF-being protonated
![2-[(4-methylphenyl)methylidene]-4H-1,4-benzothiazin-3-one Structure](https://image.chemsrc.com/caspic/199/95476-30-5.png)