Reactivities of carbonyl sulfide (COS), carbon disulfide (CS2) and carbon dioxide(CO2)with transition metal complexes

A microwave spectrograph is described in which the absorption of the gas being studied is modulated by the application of a periodic Stark‐effect field so that the output of the crystal detector contains a radiofrequency component which can be amplified with a narrow‐band amplifier. By using a very narrow band‐width, achieved by employing phase‐sensitive detection, high sensitivity is obtained. The klystron is swept mechanically over the frequency range. Details of the components are given.

A Stark-effect microwave spectrograph of high sensitivity.

Infra‐Red Instrumentation and Techniques

The following molecular electric dipole moments, in Debye units, have been obtained from the Stark effect of pure rotational spectra observed in the microwave region: 0.234±0.004 for NF3; 1.03±0.01 for PF3; 1.77±0.02 for POF3; 3.00±0.02 for HCN; 3.92±0.06 for CH3CN; 3.83±0.06 for CH3NC; 1.79±0.02 for CH3F; 0.75±0.01 for CH3CCH; 1.26±0.01 for SiF3H. All values apply to the ground vibrational state.

D. K. Coles

Papers

Resolution of a Rotational Line of the OCS Molecule and Its Stark Effect

Bond Distances in OCS from Microwave Absorption Lines