Abstract

Molecular beam electric resonance spectroscopy has been carried out on formaldehyde, H2CO; thioformaldehyde, H2CS; and ketene, H2CCO. Transitions from 1 to 2500 MHz were studied. The high frequency work utilized a new type resonance field of microstrip line configuration. The diagonal tensor elements for all the hyperfine interactions of protons in all three molecules are reported. 13C hyperfine elements for H2 13CO and D hyperfine elements for D2CCO are also given. The electric field gradient tensor at deuterium in ketene is not coincident with cylindrical C–D bonds. Precise dipole moments are obtained for H2CO, D2CO, H2 13CO, H2CO(ν4=1), H2CO(ν6=1), H2CS, H2CCO, and D2CCO.

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