Experimental Determination of the Field Gradient at the Deuteron in Formaldehyde

A high-resolution microwave spectrograph has been constructed to observe small perturbations in rotational energy levels. High-resolution spectroscopy on OCD2 yielded the following values of the quadrupole coupling constants in the OCD2 principal inertial axis system: χaa = —13±4 kc/sec, χbb = 98±4...

Full description

Saved in:
Bibliographic Details
Published in:The Journal of chemical physics 1964-07, Vol.41 (1), p.206-214
Main Author: Flygare, W. H.
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A high-resolution microwave spectrograph has been constructed to observe small perturbations in rotational energy levels. High-resolution spectroscopy on OCD2 yielded the following values of the quadrupole coupling constants in the OCD2 principal inertial axis system: χaa = —13±4 kc/sec, χbb = 98±4 kc/sec, and χcc = —85±4 kc/sec. The spin—rotation coupling constants in OCD2 were calculated from the values for the proton obtained from the beam-maser spectroscopy on OCH2. Data on the 212→211 transition in OCHD is then analyzed yielding the following coupling constants in the OCHD principal inertial axis system: χa′a′ = 9±2 kc/sec, χb′b′ = 76±2 kc/sec, and χc′c′ = —85±2 kc/sec. The above data show that the principal field-gradient axis system coincides with the bond axis system within experimental error. The principal field-gradient components all in units of esu cm—3 are qαα (C–H bond axis) = 8.45×1014, qββ = —4.15×1014, and qγγ (perpendicular to molecular plane) = —4.30×1014.
ISSN:0021-9606
1089-7690
DOI:10.1063/1.1725624