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All results from a given calculation for CH3CONH2 (Acetamide)

using model chemistry: G3

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A'
Energy calculated at G3
 hartrees
Energy at 0K-209.065414
Energy at 298.15K-209.059136
Nuclear repulsion energy122.712222
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at HF/6-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A 3966 3737 51.44      
2 A 3837 3615 50.18      
3 A 3336 3143 10.54      
4 A 3275 3086 21.14      
5 A 3216 3030 8.94      
6 A 1988 1873 439.78      
7 A 1799 1695 120.42      
8 A 1629 1535 7.29      
9 A 1617 1524 8.15      
10 A 1562 1472 72.26      
11 A 1464 1379 149.17      
12 A 1242 1170 0.86      
13 A 1169 1102 9.43      
14 A 1079 1017 13.65      
15 A 915 862 0.88      
16 A 696 656 28.58      
17 A 601 567 24.75      
18 A 554 522 6.24      
19 A 448 422 4.34      
20 A 229 215 306.40      
21 A 47 44 0.70      

Unscaled Zero Point Vibrational Energy (zpe) 17334.2 cm-1
Scaled (by 0.9422) Zero Point Vibrational Energy (zpe) 16332.3 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at MP2=FULL/6-31G*
ABC
0.35625 0.31072 0.17153

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31G*

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -1.371 -0.287 -0.000
C2 0.081 0.155 0.001
N3 0.979 -0.882 -0.032
O4 0.427 1.330 0.004
H5 -1.998 0.601 -0.059
H6 -1.581 -0.940 -0.852
H7 -1.609 -0.838 0.915
H8 1.959 -0.655 0.068
H9 0.697 -1.841 0.108

Atom - Atom Distances (Å)
  C1 C2 N3 O4 H5 H6 H7 H8 H9
C11.51812.42472.41811.08861.09411.09433.35112.5897
C21.51811.37261.22432.12772.16612.16252.04622.0922
N32.42471.37262.28013.32662.68902.75561.01101.0093
O42.41811.22432.28012.53363.14963.11022.50763.1841
H51.08862.12773.32662.53361.78301.78084.15383.6414
H61.09412.16612.68903.14961.78301.76983.66902.6317
H71.09432.16252.75563.11021.78081.76983.67102.6405
H83.35112.04621.01102.50764.15383.66903.67101.7324
H92.58972.09221.00933.18413.64142.63172.64051.7324

picture of Acetamide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 115.066 C1 C2 O4 122.734
C2 C1 H5 108.934 C2 C1 H6 111.598
C2 C1 H7 109.592 C2 N3 H8 117.751
C2 N3 H9 121.901 N3 C2 O4 122.200
H5 C1 H6 109.744 H5 C1 H7 108.809
H6 C1 H7 108.119 H8 N3 H9 117.962
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability