Knowledge Bank

The microwave spectrum of 7-oxabicyclo[4.1.0] hept-3-ene [FIGURE] has been studied in the R-band (26.5-40 GHz) and X-band (7.2--2.4 GHz)regions using a Hewlett-Packard Model 8400 C microwave spectrometer. The rotational constants for the ground state are (in MHz) $A=4073.15\pm 0.02,B=3394.53\pm 0.02,C=2174.06\pm 0.01$.Stark effect measurements have allowed determination of the dipole moment components $\mu a=0.775\pm 0.002,\mu c=1.77\pm 0.01$ for a total dipole moment $\mu =1.93\pm 0.01D$.