Knowledge Bank

The microwave spectrum of the methylcyclopropane(MCP)-HCl complex has been observed using a pulsed nozzle, molecular beam Fourier transform microwave spectrometer. Transitions were assigned with the aid of the quadrupole hyperfine structure from the chlorine nucleus. The rotational constants of the $C4H7-H35Cl$ species are $A=6408.1(2)MHz,B=1410.486(1)MHz,C=1224.155(1)MHz$. In addition to this species, the spectra of the MCP $H37Cl$ and $MCP-DCl$ isotopomers have also been studied. The data is consistent with the HCl attached to the C-C bond of the MCP ring that is adjacent to the methyl substituted carbon.