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All results from a given calculation for CH3CONH2 (Acetamide)

using model chemistry: B3PW91/6-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A'
Energy calculated at B3PW91/6-31G
 hartrees
Energy at 0K-209.074285
Energy at 298.15K-209.080389
Nuclear repulsion energy120.808510
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 B3PW91/6-31G
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 3773 3613 29.22      
2 A 3629 3475 30.02      
3 A 3195 3060 5.98      
4 A 3144 3011 15.22      
5 A 3066 2936 7.31      
6 A 1746 1673 298.93      
7 A 1676 1605 75.57      
8 A 1531 1466 13.23      
9 A 1513 1449 15.63      
10 A 1442 1381 62.73      
11 A 1401 1342 140.27      
12 A 1145 1096 1.45      
13 A 1092 1046 17.11      
14 A 1016 973 5.54      
15 A 866 830 1.05      
16 A 692 663 146.60      
17 A 561 537 125.04      
18 A 545 522 46.57      
19 A 508 486 73.85      
20 A 429 411 4.29      
21 A 44 42 0.67      

Unscaled Zero Point Vibrational Energy (zpe) 16506.1 cm-1
Scaled (by 0.9577) Zero Point Vibrational Energy (zpe) 15807.9 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 B3PW91/6-31G
ABC
0.35322 0.30855 0.16994

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-31G

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -1.370 -0.311 -0.000
C2 0.074 0.140 -0.010
N3 1.006 -0.862 0.001
O4 0.401 1.343 0.001
H5 -1.989 0.491 -0.403
H6 -1.529 -1.221 -0.587
H7 -1.693 -0.506 1.029
H8 1.982 -0.612 0.024
H9 0.755 -1.836 -0.011

Atom - Atom Distances (Å)
  C1 C2 N3 O4 H5 H6 H7 H8 H9
C11.51302.43882.42291.09071.09481.09673.36512.6159
C21.51301.36871.24632.13002.18132.14972.05072.0906
N32.43881.36872.28683.31162.62672.91021.00791.0057
O42.42291.24632.28682.56953.26282.97692.51423.1990
H51.09072.13003.31162.56951.78291.77044.14363.6199
H61.09482.18132.62673.26281.78291.77523.61522.4346
H71.09672.14972.91022.97691.77041.77523.81152.9744
H83.36512.05071.00792.51424.14363.61523.81151.7335
H92.61592.09061.00573.19903.61992.43462.97441.7335

picture of Acetamide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 115.536 C1 C2 O4 122.538
C2 C1 H5 108.703 C2 C1 H6 112.546
C2 C1 H7 109.900 C2 N3 H8 118.495
C2 N3 H9 122.668 N3 C2 O4 121.910
H5 C1 H6 109.325 H5 C1 H7 108.069
H6 C1 H7 108.200 H8 N3 H9 118.836
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.556      
2 C 0.516      
3 N -0.762      
4 O -0.469      
5 H 0.210      
6 H 0.167      
7 H 0.200      
8 H 0.353      
9 H 0.342      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.241 -4.147 0.087 4.155
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.061 -2.570 -0.023
y -2.570 -25.884 -0.057
z -0.023 -0.057 -24.788
Traceless
 xyz
x 5.275 -2.570 -0.023
y -2.570 -3.460 -0.057
z -0.023 -0.057 -1.815
Polar
3z2-r2-3.630
x2-y25.824
xy-2.570
xz-0.023
yz-0.057


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 0.000 0.000 0.000
y 0.000 0.000 0.000
z 0.000 0.000 0.000


<r2> (average value of r2) Å2
<r2> 75.681
(<r2>)1/2 8.699