4nitrofenyl
The 4-nitrofenyl group, also called para-nitrophenyl (p-nitrophenyl), refers to the aryl substituent derived from parad nitrobenzene in which a nitro group resides at the 4-position relative to the point of attachment to the rest of the molecule. In practice, the group is attached to another fragment through the carbon at the 1-position of the ring, while a nitro group sits para to that linkage. The 4-nitrofenyl moiety is a common activating and leaving group in organic synthesis.
Chemically, the nitro group is strongly electron-withdrawing, which stabilizes negative charge on the corresponding phenoxide when
A notable property of 4-nitrophenyl systems is their color and chromogenic behavior. The p-nitrophenyl chromophore absorbs
Safety considerations apply to nitroaromatic compounds, which can be toxic and environmentally persistent. Proper handling, ventilation,