Resonance Raman spectra of polyyne molecules C10H2 and C12H2 in solution

Resonance Raman spectra of C10H2 and C12H2 were measured to identify σg stretching fundamentals of ν2, ν3, and ν4 in D∞h. The Raman intensity was analyzed by the theory of resonance scattering via the dipole-allowed electronic transition of 1Σu+↔X∼1Σg+.