Ne3-NH3 van der Waals tetramer: Rotational spectra and ab initio study of the microsolvation of NH3 with rare gas atoms

Microwave rotational spectra of eleven isotopomers of the Ne3-NH3 van der Waals tetramer is measured with the help of a pulsed jet. The experimental findings are complemented by the construction of three ab initio potential energy surfaces for the Ne3-NH3 complex, each corresponding to a different internal geometry of NH3.