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In the caption of Table 3 we erroneously indicated the units of the interaction energies as kcal/mol. They should read as eV.

The correct table is given below.1

Table 1. Interaction energies (eV) of small organic molecules and gold clusters, computed with different DFT methods. The mean error (ME), mean absolute error (MAE) and mean absolute relative error (MARE) of each method with respect to CCSD(T) are reported in the last lines. For each row the result in best agreement with CCSD(T) calculations is highlighted in bold style, the one in worst agreement is underlined.
     hPBEint 
SystemPBEPBEintPBEsolPBE0n = 4n = 5n = 6CCSD(T)
Au2–SH1.992.202.351.571.721.811.871.98
Aumath image–N20.991.131.270.840.950.991.011.30
Au2–SHCH30.881.041.170.780.900.920.941.24
Au3–SH3.023.203.332.963.093.113.123.15
Au3–N20.770.931.060.670.780.740.770.78
Au3–SCH32.732.903.032.662.792.812.822.88
Au4–SH2.182.362.492.092.232.252.272.48
Aumath image–N20.670.800.920.580.680.700.720.74
Au4–SHCH30.951.111.240.931.041.061.071.05
ME−0.160.010.14−0.28−0.16−0.13−0.11 
MAE0.160.120.160.280.160.140.12 
MARE10.61%8.84%13.08%18.89%10.30%9.16%7.72% 
Std Dev0.140.140.150.150.140.130.12