Knowledge Bank

Microwave spectrum of the van der Waals complex of dimethylether(DME) and nitrous oxide(N$2$O) has been investigated by using Balle-Flygare type Fourier transform microwave spectrometer from 6 to 18 GHz. The rotational spectrum exhibited many hyper-fine structure due to the two nitrogen nuclei $\mathrm{<mrow\; data-mjx-texclass="ORD">14</mrow>}$N($I$ =1). However, no internal rotation splitting due to the two methyl groups in DME was observed. \ The rotational, centrifugal distortion, and nuclear quadrupole coupling constants for two nitrogen have been determined. The molecular structure of the complex is planer except for the methyl hydrogen. DME and N$2$O are triply van der Waals bonded between H$\cdots$N, O$\cdots$N, and H$\cdots$O with the H$\cdots$O distance slightly shorter than H$\cdots$N. The molecular properties of the complex are compared with those of the isoelectronic complexes DME$\cdots$OCS, DME$\cdots$CO$2$, and DME$\cdots$CS$2$.