Add time:07/24/2019         Source:sciencedirect.com

The microwave spectra of five isotopic species of Chlorodimethylsilane (cas 1066-35-9) have been investigated in the region from 5 to 20 GHz using a Fourier transform microwave spectrometer. The molecular structure of (CH3)2SiHCl obtained by the substitution method is the following one: rs(Si–Cl)=2.0604(10)Å, rs(Si–C)=1.8542(10)Å, ∠ClSiC=108.43(20)°, and ∠CSiC=112.32(15)°. The quadrupole coupling constants in the principal axis system of (CH3)2SiHCl have been determined to be χaa=−32.456(5)MHz, χbb=18.061(8)MHz, and χcc=14.395(8)MHz. These values are consistent with Xzz=−35.556(6)MHz and η=0.016(10). The estimated value of the potential barrier V3 of internal rotation of two methyl tops is in agreement with those of the related molecules.

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