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All results from a given calculation for CH3CONH2 (Acetamide)

using model chemistry: CCSD=FULL/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 CCSD=FULL/6-31G*
 hartrees
Energy at 0K-208.612590
Energy at 298.15K-208.618498
HF Energy-207.973867
Nuclear repulsion energy121.357417
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 CCSD=FULL/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 3732 3544 30.67      
2 A 3609 3428 33.81      
3 A 3206 3045 5.57      
4 A 3152 2993 11.50      
5 A 3082 2927 6.08      
6 A 1859 1766 285.86      
7 A 1676 1592 103.34      
8 A 1534 1457 9.09      
9 A 1529 1453 8.93      
10 A 1462 1389 89.36      
11 A 1390 1320 87.15      
12 A 1169 1110 0.37      
13 A 1090 1036 5.92      
14 A 1012 961 7.50      
15 A 876 832 1.42      
16 A 645 612 31.12      
17 A 565 536 21.77      
18 A 518 492 28.09      
19 A 427 406 11.02      
20 A 347 330 263.26      
21 A 44 42 0.25      

Unscaled Zero Point Vibrational Energy (zpe) 16461.2 cm-1
Scaled (by 0.9498) Zero Point Vibrational Energy (zpe) 15634.9 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 CCSD=FULL/6-31G*
ABC
0.35783 0.30977 0.17172

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -1.371 -0.296 0.000
C2 0.080 0.155 0.001
N3 0.990 -0.872 -0.033
O4 0.415 1.329 0.005
H5 -2.008 0.588 -0.057
H6 -1.576 -0.952 -0.855
H7 -1.603 -0.852 0.917
H8 1.968 -0.634 0.071
H9 0.718 -1.833 0.111

Atom - Atom Distances (Å)
  C1 C2 N3 O4 H5 H6 H7 H8 H9
C11.51972.43022.41411.09131.09691.09713.35632.5956
C21.51971.37241.21982.13292.16852.16502.04712.0913
N32.43021.37242.27443.33422.69582.76131.01131.0097
O42.41411.21982.27442.53353.14713.10762.50363.1780
H51.09132.13293.33422.53351.78751.78544.16083.6495
H61.09692.16852.69583.14711.78751.77473.67642.6402
H71.09712.16502.76133.10761.78541.77473.67582.6452
H83.35632.04711.01132.50364.16083.67643.67581.7325
H92.59562.09131.00973.17803.64952.64022.64521.7325

picture of Acetamide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 114.240 C1 C2 O4 123.200
C2 C1 H5 108.434 C2 C1 H6 110.902
C2 C1 H7 110.615 C2 N3 H8 117.557
C2 N3 H9 122.039 N3 C2 O4 122.546
H5 C1 H6 109.550 H5 C1 H7 109.344
H6 C1 H7 107.978 H8 N3 H9 118.020
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability