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All results from a given calculation for CH3CONH2 (Acetamide)

using model chemistry: MP2/CEP-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A'
Energy calculated at MP2/CEP-31G
 hartrees
Energy at 0K-39.551969
Energy at 298.15K-39.557908
HF Energy-39.182102
Nuclear repulsion energy66.304977
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 MP2/CEP-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 3771 3644 30.06      
2 A 3610 3489 40.79      
3 A 3174 3067 23.56      
4 A 3154 3048 35.69      
5 A 3053 2950 18.42      
6 A 1698 1640 204.79      
7 A 1635 1580 133.17      
8 A 1521 1470 15.77      
9 A 1501 1450 11.68      
10 A 1455 1406 38.10      
11 A 1365 1319 190.81      
12 A 1134 1096 1.80      
13 A 1094 1057 6.39      
14 A 1014 980 16.73      
15 A 841 813 1.58      
16 A 650 628 96.99      
17 A 534 516 94.90      
18 A 517 500 22.51      
19 A 420 406 209.93      
20 A 415 401 4.22      
21 A 42 40 2.23      

Unscaled Zero Point Vibrational Energy (zpe) 16299.3 cm-1
Scaled (by 0.9663) Zero Point Vibrational Energy (zpe) 15750.1 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/CEP-31G
ABC
0.33537 0.29235 0.16105

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -1.391 -0.338 0.000
C2 0.076 0.171 -0.009
N3 1.069 -0.829 -0.000
O4 0.382 1.418 -0.000
H5 -1.989 0.291 -0.687
H6 -1.466 -1.401 -0.309
H7 -1.810 -0.230 1.023
H8 2.047 -0.539 0.023
H9 0.845 -1.821 -0.013

Atom - Atom Distances (Å)
  C1 C2 N3 O4 H5 H6 H7 H8 H9
C11.55302.50882.49571.10721.10951.10983.44412.6838
C21.55301.40951.28412.17732.22222.18652.09542.1360
N32.50881.40952.34993.32862.61673.11331.02011.0176
O42.49571.28412.34992.71433.38472.92712.57003.2727
H51.10722.17733.32862.71431.81041.79664.18163.5985
H61.10952.22222.61673.38471.81041.80623.63192.3673
H71.10982.18653.11332.92711.79661.80623.99603.2641
H83.44412.09541.02012.57004.18163.63193.99601.7577
H92.68382.13601.01763.27273.59852.36733.26411.7577

picture of Acetamide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 115.658 C1 C2 O4 122.921
C2 C1 H5 108.704 C2 C1 H6 112.071
C2 C1 H7 109.262 C2 N3 H8 118.307
C2 N3 H9 122.480 N3 C2 O4 121.410
H5 C1 H6 109.518 H5 C1 H7 108.265
H6 C1 H7 108.944 H8 N3 H9 119.213
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability