return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for CH3CONH2 (Acetamide)

using model chemistry: PBEPBE/cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A'
Energy calculated at PBEPBE/cc-pVTZ
 hartrees
Energy at 0K-209.049197
Energy at 298.15K-209.054710
Nuclear repulsion energy121.082698
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 PBEPBE/cc-pVTZ
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 3645 3620 25.91      
2 A 3507 3482 19.68      
3 A 3067 3046 9.45      
4 A 3059 3038 11.81      
5 A 2984 2963 8.66      
6 A 1725 1713 299.94      
7 A 1559 1549 92.78      
8 A 1440 1430 9.07      
9 A 1420 1410 7.53      
10 A 1342 1333 69.44      
11 A 1302 1293 90.95      
12 A 1079 1072 0.16      
13 A 1011 1004 3.09      
14 A 946 939 6.72      
15 A 821 815 3.13      
16 A 657 652 6.44      
17 A 524 521 11.75      
18 A 508 504 6.29      
19 A 416 413 4.62      
20 A 121 120 160.79      
21 A 41 41 10.21      

Unscaled Zero Point Vibrational Energy (zpe) 15586.4 cm-1
Scaled (by 0.9931) Zero Point Vibrational Energy (zpe) 15478.8 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 PBEPBE/cc-pVTZ
ABC
0.35783 0.30729 0.17059

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/cc-pVTZ

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -1.365 -0.340 -0.000
C2 0.076 0.146 -0.002
N3 1.030 -0.837 -0.004
O4 0.366 1.337 0.001
H5 -1.894 0.139 -0.833
H6 -1.472 -1.429 -0.083
H7 -1.845 -0.003 0.928
H8 2.004 -0.559 0.014
H9 0.799 -1.821 0.010

Atom - Atom Distances (Å)
  C1 C2 N3 O4 H5 H6 H7 H8 H9
C11.52082.44582.41001.09701.09781.09803.37622.6217
C21.52081.37001.22582.13862.21062.13992.05332.0957
N32.44581.37002.27383.19262.57263.13511.01341.0107
O42.41001.22582.27382.69063.32262.74692.50653.1878
H51.09702.13863.19262.69061.78901.76744.05043.4356
H61.09782.21062.57263.32261.78901.78713.58512.3062
H71.09802.13993.13512.74691.76741.78713.99523.3369
H83.37622.05331.01342.50654.05043.58513.99521.7452
H92.62172.09571.01073.18783.43562.30623.33691.7452

picture of Acetamide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 115.472 C1 C2 O4 122.313
C2 C1 H5 108.473 C2 C1 H6 114.206
C2 C1 H7 108.520 C2 N3 H8 118.197
C2 N3 H9 122.637 N3 C2 O4 122.215
H5 C1 H6 109.197 H5 C1 H7 107.260
H6 C1 H7 108.961 H8 N3 H9 119.133
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.298      
2 C 0.173      
3 N -0.189      
4 O -0.304      
5 H 0.122      
6 H 0.076      
7 H 0.122      
8 H 0.153      
9 H 0.145      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.012 -3.709 0.053 3.709
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.595 -2.394 0.058
y -2.394 -25.927 -0.068
z 0.058 -0.068 -25.013
Traceless
 xyz
x 4.875 -2.394 0.058
y -2.394 -3.123 -0.068
z 0.058 -0.068 -1.752
Polar
3z2-r2-3.504
x2-y25.332
xy-2.394
xz0.058
yz-0.068


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.296 -0.220 0.001
y -0.220 6.213 -0.001
z 0.001 -0.001 3.887


<r2> (average value of r2) Å2
<r2> 75.705
(<r2>)1/2 8.701