Raman Spectra of Some Organic Halides

Raman spectra obtained by helium excitation from nineteen organic compounds, CH${\mathrm{Cl}}_3$, C${\mathrm{H}}_3$Br, C${\mathrm{H}}_3$MgBr, C${\mathrm{H}}_3$I, C${\mathrm{H}}_3$MgI, ${\mathrm{C}}_2$ ${\mathrm{H}}_5$Cl, ${\mathrm{C}}_2$ ${\mathrm{H}}_5$Br, ${\mathrm{C}}_2$ ${\mathrm{H}}_5$I, ClC${\mathrm{H}}_2$C${\mathrm{H}}_2$Cl, BrC${\mathrm{H}}_2$C${\mathrm{H}}_2$Br, C${\mathrm{H}}_3$CH${\mathrm{Cl}}_2$, C${\mathrm{H}}_3$CH${\mathrm{Br}}_2$, ${\mathrm{C}}_2$ ${\mathrm{H}}_2$ ${\mathrm{Cl}}_4$, ${\mathrm{C}}_2$ ${\mathrm{H}}_2$ ${\mathrm{Br}}_4$, ${\mathrm{C}}_6$ ${\mathrm{H}}_6$, ${\mathrm{C}}_5$ ${\mathrm{H}}_5$N, ${\mathrm{C}}_6$ ${\mathrm{H}}_5$C${\mathrm{H}}_2$Cl, ${\mathrm{C}}_6$ ${\mathrm{H}}_5$Cl, ${\mathrm{C}}_6$ ${\mathrm{H}}_5$Br, five of which have not been reported on before, are described and discussed. It is shown that in many cases the observed frequencies can be expressed in terms of four assumed fundamentals (five in the cyclic compounds), two of which are not observed, and which may prove to be illusory. The bearing of such theory as is available is discussed.