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All results from a given calculation for CH3CONH2 (Acetamide)

using model chemistry: QCISD/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A'
Energy calculated at QCISD/6-31G*
 hartrees
Energy at 0K-208.599767
Energy at 298.15K-208.605666
HF Energy-207.973412
Nuclear repulsion energy121.155464
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 QCISD/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 3725 3547 28.96      
2 A 3603 3431 31.21      
3 A 3200 3048 6.07      
4 A 3146 2996 12.20      
5 A 3077 2930 6.53      
6 A 1836 1748 275.81      
7 A 1673 1594 97.43      
8 A 1532 1459 8.86      
9 A 1528 1455 9.15      
10 A 1457 1388 84.32      
11 A 1385 1319 89.90      
12 A 1165 1110 0.47      
13 A 1086 1034 5.83      
14 A 1008 960 7.74      
15 A 871 829 1.55      
16 A 641 610 34.12      
17 A 561 534 21.78      
18 A 516 491 30.04      
19 A 425 405 14.17      
20 A 359 341 254.29      
21 A 39 37 0.25      

Unscaled Zero Point Vibrational Energy (zpe) 16415.8 cm-1
Scaled (by 0.9523) Zero Point Vibrational Energy (zpe) 15632.8 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 QCISD/6-31G*
ABC
0.35657 0.30869 0.17112

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -1.374 -0.294 0.000
C2 0.081 0.155 0.001
N3 0.990 -0.875 -0.033
O4 0.419 1.330 0.005
H5 -2.009 0.592 -0.058
H6 -1.581 -0.950 -0.855
H7 -1.608 -0.850 0.918
H8 1.968 -0.640 0.071
H9 0.716 -1.837 0.111

Atom - Atom Distances (Å)
  C1 C2 N3 O4 H5 H6 H7 H8 H9
C11.52262.43432.41921.09191.09751.09783.36052.5998
C21.52261.37461.22242.13572.17182.16842.04912.0939
N32.43431.37462.27823.33862.70032.76601.01161.0101
O42.41921.22242.27822.53843.15283.11322.50663.1825
H51.09192.13573.33862.53841.78831.78634.16543.6542
H61.09752.17182.70033.15281.78831.77553.68112.6448
H71.09782.16842.76603.11321.78631.77553.68072.6503
H83.36052.04911.01162.50664.16543.68113.68071.7329
H92.59982.09391.01013.18253.65422.64482.65031.7329

picture of Acetamide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 114.232 C1 C2 O4 123.235
C2 C1 H5 108.428 C2 C1 H6 110.932
C2 C1 H7 110.647 C2 N3 H8 117.540
C2 N3 H9 122.070 N3 C2 O4 122.520
H5 C1 H6 109.531 H5 C1 H7 109.331
H6 C1 H7 107.955 H8 N3 H9 118.000
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability