The rotational Zeeman effect in the OCO–HF, OCO–DF, OCO–HCl, and SCO–HF complexes

The rotational Zeeman effect has been measured in the hydrogen-bound complexes OCO–HF, OCO–DF, OCO–HCl and SCO–HF. The zero-field rotational spectra of the isotopic species SCO–DF, 34SCO–HF, O 13CO–HF, 18OC 18O–HF, O 13CO–HCl, and 18OC 18O–HCl have also been measured. The above studies were carried out on a pulsed Fourier-transform microwave spectrometer employing a supersonic nozzle and Fabry–Perot cavity. The following spectroscopic constants were obtained: The Zeeman parameters are compared with values predicted by a set of equations which project the values of the individual subunits. The Zeeman parameters allow calculation of the quadrupole moment of each complex. With an estimated bulk magnetic susceptibility, diamagnetic susceptibilities, and the second moments of the electronic charge distribution are also calculated.