Rotational spectrum, dynamics, and bond energy of the floppy dimethylether⋯neon van der Waals complex

Abstract

The equilibrium conformation, dynamics, and dissociation energy of the weakly bonded dimethylether⋯Ne complex have been deduced from its pulsed jet millimeter wave spectrum. Each rotational transition is split into two component lines. The corresponding vibrational splitting has been determined to be ΔE=807.2(9) MHz. The inversion barrier between the two equivalent minima with Ne above or below the COC plane has been calculated from this datum to be 16 cm−1. The dissociation energy of the complex is estimated, from the centrifugal distortion constant DJ, to be ca. 1.0 kJ/mol.