| Mode of
vibration of acetylene |
| ν1(cm-1) |
| ν3(cm-1) |
| 3373.7 |
| 3278 |
| ν1+ν3=6651.7(cm-1) |
| Wavelength=1.5 |
|
|
|
| υ1
mode alone is dipole-forbidden, |
||
| it
can be excited in combination with |
||
| the
dipole-allowed υ3 mode excitation |
||