Isomers C-H  rocking vibration C-C stretching vibration C-H stretching vibration
C∞v C2H 292.3 2082.9 3463.8
C∞v C2HAg- 1A 612.4 1995.8 3433.2
C∞v C2HAg2- 2A 617.8 2013.2 3441.2
C2v C2HAg3- 3A 621.5 2020.8 3444.5,
Cs C2HAg4- 4A 631.4 2026.6 3446.1
Table 3: C-H rocking vibration, C-C and C-H stretching vibration (cm-1) of the ground states of C2HAgn-(n=1-4) clusters at B3LYP level.