Structure of the amine group in m-fluoroaniline by microwave spectroscopy

Abstract

Microwave spectra of the normal and amine deuterated isotopic species of m-fluoroaniline have been observed. The structure of the amine group determined using the normal isotopic species as the parent molecule is r_N–H= 1.00 Å(assumed), ∠ HNH = 115.0°, ϕ= 36.2°(ϕ is the angle between the bisector of the HNH angle and the extension of the CN bond) and is similar to that in aniline. The structure of the amine group determined using m-fluoroaniline-ND₂ as the parent molecule is r_N–H= 1.00 Å(assumed), ∠ HNH = 117.5°, ϕ= 42.0°.