Deuterium enhancement in hot molecular cores is an important process,
 and we have estimated the D/H ratio by means of HDO and NH2D radio
 observations. The OD radical, although predicted to be abundant by
 various chemical scenarios, has never been observed in space but would
 give important clues to D fractionation. We wish to detect and analyze
 three IR lines of OD in our sample of hot cores. Because these regions
 have temperatures above 100 K or more, they are capable of exciting
 the IR transitions of OD. It will also be of considerable interest to
 determine the OD abundance relative to OH as well as its excitation.