Band 746.5 cm^-1: ν₅ of C₂H₂ in C2H2 - phase II Band 761.5 cm^-1: ν₅ of C₂H₂ in C2H2 - phase II Band 770.5 cm^-1: ν₅ of C₂H₂ in C2H2 - phase II Band 791.5 cm^-1: ν₅ ? of C₂H₂ in C2H2 - phase II Band 3226.0 cm^-1: ν₃ of C₂H₂ in C2H2 - phase II Band 3317.5 cm^-1: ν₁ of C₂H₂ in C2H2 - phase II Band 3332.0 cm^-1: ν₁ of C₂H₂ in C2H2 - phase II Band 3351.0 cm^-1: ν₁ of C₂H₂ in C2H2 - phase II

Band 3222.0 cm^-1: ν₃ of ¹³C¹²C¹H₂ in C2H2 - phase II

Band 850.0 cm^-1: ν₅+ν_L of C₂H₂ in C2H2 - phase II Band 875.0 cm^-1: ν₅+ν_L of C₂H₂ in C2H2 - phase II Band 886.0 cm^-1: ν₅+ν_L of C₂H₂ in C2H2 - phase II Band 899.0 cm^-1: ν₅+ν_L of C₂H₂ in C2H2 - phase II Band 1094.5 cm^-1: unknown of C₂H₂ in C2H2 - phase II Band 1233.5 cm^-1: unknown of C₂H₂ in C2H2 - phase II Band 1282.0 cm^-1: 2ν₄ of C₂H₂ in C2H2 - phase II Band 1374.0 cm^-1: ν₄+ν₅ of C₂H₂ in C2H2 - phase II Band 1391.5 cm^-1: ν₄+ν₅ of C₂H₂ in C2H2 - phase II Band 1410.0 cm^-1: ν₄+ν₅ of C₂H₂ in C2H2 - phase II Band 1420.0 cm^-1: ν₄+ν₅ of C₂H₂ in C2H2 - phase II Band 1709.5 cm^-1: unknown of C₂H₂ in C2H2 - phase II Band 1961.5 cm^-1: unknown of C₂H₂ in C2H2 - phase II Band 2063.0 cm^-1: ν₂+ν_T of C₂H₂ in C2H2 - phase II Band 2545.0 cm^-1: unknown of C₂H₂ in C2H2 - phase II Band 2720.0 cm^-1: ν₂+ν₅ of C₂H₂ in C2H2 - phase II Band 2738.0 cm^-1: unknown of C₂H₂ in C2H2 - phase II Band 2783.0 cm^-1: unknown of C₂H₂ in C2H2 - phase II Band 3279.5 cm^-1: unknown of C₂H₂ in C2H2 - phase II Band 3307.5 cm^-1: unknown of C₂H₂ in C2H2 - phase II Band 3392.0 cm^-1: ν₂+2ν₅ of C₂H₂ in C2H2 - phase II Band 3427.0 cm^-1: ν₂+2ν₅ of C₂H₂ in C2H2 - phase II Band 3436.0 cm^-1: ν₂+2ν₅ of C₂H₂ in C2H2 - phase II Band 3857.5 cm^-1: ν₃+ν₄ of C₂H₂ and ν₂+2ν₄+ν₅ of C₂H₂ in C2H2 - phase II Band 3864.0 cm^-1: ν₃+ν₄ of C₂H₂ in C2H2 - phase II Band 3874.0 cm^-1: ν₃+ν₄ of C₂H₂ in C2H2 - phase II Band 3890.0 cm^-1: unknown of C₂H₂ in C2H2 - phase II Band 3914.0 cm^-1: unknown of C₂H₂ in C2H2 - phase II Band 4077.0 cm^-1: ν₁+ν₅ of C₂H₂ in C2H2 - phase II Band 4090.0 cm^-1: ν₁+ν₅ of C₂H₂ in C2H2 - phase II Band 4502.5 cm^-1: ν₃+2ν₄ of C₂H₂ in C2H2 - phase II Band 4686.0 cm^-1: ν₁+ν₄+ν₅ of C₂H₂ in C2H2 - phase II Band 5176.0 cm^-1: 5ν₄+3ν₅ of C₂H₂ in C2H2 - phase II Band 5185.5 cm^-1: 5ν₄+3ν₅ of C₂H₂ in C2H2 - phase II Band 5276.0 cm^-1: ν₁+2ν₄+ν₅ of C₂H₂ in C2H2 - phase II Band 6421.0 cm^-1: ν₁+ν₃ of C₂H₂ and ν₂+ν₃+2ν₄ ? of C₂H₂ in C2H2 - phase II Band 6432.0 cm^-1: ν₁+ν₃ of C₂H₂ in C2H2 - phase II Band 6442.0 cm^-1: ν₁+ν₃ of C₂H₂ in C2H2 - phase II Band 6456.0 cm^-1: ν₁+ν₃ of C₂H₂ in C2H2 - phase II Band 6474.0 cm^-1: unknown of C₂H₂ in C2H2 - phase II