Isomers NRT CNRT INRT Covalent Percentage ADE VDE C∞v C2HAg 1N 1.00 0.36 0.64 0.36     C∞v C2HAg- 1A 0.52 0.17 0.35 0.33 1.21 1.29 Cs C2HAg2 2N 0.18 0.08 0.10 0.44     C∞v C2HAg2- 2A 0.37 0.11 0.26 0.30 3.11 3.17 C2v C2HAg3 3N 0.85 0.32 0.53 0.38     C2v C2HAg3- 3A 0.41 0.13 0.28 0.32 2.04 2.03 Cs C2HAg4 4N 0.40 0.05 0.35 0.13     Cs C2HAg4- 4A 0.43 0.13 0.30 0.30 2.55 3.28

Table 2: Calculated NRT bond orders, covalent (CNRT) and ionic (INRT) of C(c)- Ag(c) in the ground states of C2HAgn0/-(n=1-4) clusters at B3LYP level. Ag(c) and C(c) represents atoms connected with C or Ag. The ADE and VDE of the ions are also tabulated.