The rotational spectrum of an//-2,3-dimethylthiirane, CH 3 -C 2 H 2 S-CH 3 , was recently investigated in our laboratory [1]. In this study the rotational spectra of the normal, 3 S, and l 3 C isotopomers were measured, assigned and analysed for internal rotation and the molecular structure. The present communication aims at the nuclear quadrupole coupling of the 3 S isotopomer, measured in nat...

Nuclear electric quadrupole coupling constants e2qQ/h have been obtained b y evaluation o f quadrupole perturbations in 5 1 V N M R spectra of various vanadyl esters and esterchlorides of the general formula V O C l 3 _ „ ( O R ) n («, = 0 3 ; = Me, Prra, Pr*, B u » and Bu«). e2qQlh values have been calculated from (i) 2nd. order quadrupole splittings of the 5 1 V N M R signals in pseudopolycra...

The rotational constants and the nitrogen nuclear quadrupole coupling constants of cis-3-aminophenol and trans-3-aminophenol are determined using Fourier-transform microwave spectroscopy. We examine several J = 2 <-- 1 and 1 <-- 0 hyperfine-resolved rotational transitions for both conformers. The transitions are fit to a rigid rotor Hamiltonian including nuclear quadrupole coupling to account f...

The power spectra of the scalarand tensor-type structures generated in an inflation model based on nonminimally coupled scalar field are derived. The contributions of these structures to the anisotropy of the cosmic microwave background radiation are derived, and are compared with the four year COBE DMR data. The constraints on the ratio of the self-coupling and nonmimimal coupling constants, t...

An electron spm echo modulation frequency analysis of P*-860 is performed in 14N chromatophores of RhodospiMhn ncbrum, and in “‘N substituted reaction centers from Rhodopseudomonas spheeroides 2.4.1, For the 14N matcnal two sets of nuclear quadrupole parameters are obtained. From the frequencies found for 15N reaction centers the perpendicular, paraIM and isotropic hypcrfime coupling constants ...

The nuclear quadrupole coupling constant was calculated as a function of inter nuclear distance for nine quadrupolar nuclei in eight diatomic molecules by the STO 321G method. From the value of the field-gradient and its first and second derivatives the vibrational dependence of the coupling constants were calculated and shown to compare satisfactorily with experiment. The behaviour of the fiel...