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All results from a given calculation for CH3CONH2 (Acetamide)

using model chemistry: QCISD/6-31G(2df,p)

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(2df,p)
 hartrees
Energy at 0K-208.760439
Energy at 298.15K-208.766327
HF Energy-208.001888
Nuclear repulsion energy121.719160
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(2df,p)
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 3790 3591 37.14      
2 A 3657 3465 38.32      
3 A 3216 3046 4.50      
4 A 3167 3001 8.32      
5 A 3093 2931 4.51      
6 A 1842 1745 280.96      
7 A 1651 1564 91.65      
8 A 1514 1434 6.77      
9 A 1505 1426 8.32      
10 A 1435 1360 82.53      
11 A 1363 1291 85.24      
12 A 1153 1092 0.23      
13 A 1074 1017 4.75      
14 A 994 942 8.13      
15 A 863 817 1.80      
16 A 643 609 16.92      
17 A 558 529 20.49      
18 A 516 489 9.67      
19 A 416 395 5.60      
20 A 310 293 223.95      
21 A 60 57 0.10      

Unscaled Zero Point Vibrational Energy (zpe) 16409.4 cm-1
Scaled (by 0.9474) Zero Point Vibrational Energy (zpe) 15546.3 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 QCISD/6-31G(2df,p)
ABC
0.35958 0.31123 0.17247

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/6-31G(2df,p)

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -1.371 -0.288 0.000
C2 0.083 0.158 0.001
N3 0.982 -0.874 -0.032
O4 0.422 1.321 0.004
H5 -2.004 0.594 -0.057
H6 -1.576 -0.944 -0.851
H7 -1.601 -0.843 0.914
H8 1.955 -0.646 0.072
H9 0.700 -1.826 0.107

Atom - Atom Distances (Å)
  C1 C2 N3 O4 H5 H6 H7 H8 H9
C11.52042.42492.40881.08791.09331.09353.34572.5816
C21.52041.36911.21172.13332.16572.16152.03882.0803
N32.42491.36912.26593.32822.68722.75161.00471.0026
O42.40881.21172.26592.53363.13873.09882.49523.1611
H51.08792.13333.32822.53361.78251.78024.15143.6331
H61.09332.16572.68723.13871.78251.76753.66212.6228
H71.09352.16152.75163.09881.78021.76753.66012.6296
H83.34572.03881.00472.49524.15143.66213.66011.7228
H92.58162.08031.00263.16113.63312.62282.62961.7228

picture of Acetamide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 114.013 C1 C2 O4 123.292
C2 C1 H5 108.615 C2 C1 H6 110.850
C2 C1 H7 110.505 C2 N3 H8 117.561
C2 N3 H9 121.831 N3 C2 O4 122.681
H5 C1 H6 109.611 H5 C1 H7 109.391
H6 C1 H7 107.853 H8 N3 H9 118.246
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability