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All results from a given calculation for CH3CONH2 (Acetamide)

using model chemistry: B3PW91/aug-cc-pVDZ

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/aug-cc-pVDZ
 hartrees
Energy at 0K-209.171485
Energy at 298.15K-209.177201
Nuclear repulsion energy121.488071
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/aug-cc-pVDZ
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 3748 3616 37.79      
2 A 3603 3476 32.88      
3 A 3169 3057 6.45      
4 A 3134 3023 11.95      
5 A 3054 2946 7.23      
6 A 1774 1711 375.67      
7 A 1613 1556 106.82      
8 A 1460 1408 13.82      
9 A 1439 1388 9.58      
10 A 1384 1335 116.98      
11 A 1332 1285 49.62      
12 A 1108 1069 0.39      
13 A 1033 996 3.60      
14 A 972 938 8.02      
15 A 856 825 1.48      
16 A 659 635 7.66      
17 A 545 525 13.87      
18 A 519 501 6.92      
19 A 421 406 4.35      
20 A 211 203 184.64      
21 A 42 40 2.11      

Unscaled Zero Point Vibrational Energy (zpe) 16037.5 cm-1
Scaled (by 0.9646) Zero Point Vibrational Energy (zpe) 15469.8 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 B3PW91/aug-cc-pVDZ
ABC
0.36085 0.30912 0.17188

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/aug-cc-pVDZ

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -1.364 -0.328 -0.001
C2 0.074 0.146 -0.009
N3 1.021 -0.839 -0.003
O4 0.376 1.330 0.000
H5 -1.970 0.380 -0.574
H6 -1.487 -1.339 -0.411
H7 -1.729 -0.326 1.036
H8 1.992 -0.569 0.035
H9 0.784 -1.817 -0.005

Atom - Atom Distances (Å)
  C1 C2 N3 O4 H5 H6 H7 H8 H9
C11.51362.43842.40301.09501.09791.09923.36502.6138
C21.51361.36591.22202.13382.19122.13652.04802.0878
N32.43841.36592.26253.28012.58902.98391.00921.0068
O42.40301.22202.26252.59543.28052.87092.49423.1737
H51.09502.13383.28012.59541.79391.77474.12033.5698
H61.09792.19122.58903.28051.79391.78283.59102.3560
H71.09922.13652.98392.87091.77471.78283.86143.1024
H83.36502.04801.00922.49424.12033.59103.86141.7376
H92.61382.08781.00683.17373.56982.35603.10241.7376

picture of Acetamide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 115.636 C1 C2 O4 122.544
C2 C1 H5 108.708 C2 C1 H6 113.120
C2 C1 H7 108.670 C2 N3 H8 118.370
C2 N3 H9 122.539 N3 C2 O4 121.808
H5 C1 H6 109.782 H5 C1 H7 107.957
H6 C1 H7 108.474 H8 N3 H9 119.061
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/aug-cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.426      
2 C 0.571      
3 N 0.009      
4 O -0.607      
5 H -0.078      
6 H -0.172      
7 H -0.021      
8 H -0.071      
9 H -0.058      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.224 -3.916 0.076 3.924
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.567 -2.389 0.099
y -2.389 -26.382 -0.070
z 0.099 -0.070 -25.146
Traceless
 xyz
x 5.197 -2.389 0.099
y -2.389 -3.526 -0.070
z 0.099 -0.070 -1.671
Polar
3z2-r2-3.342
x2-y25.815
xy-2.389
xz0.099
yz-0.070


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.457 -0.161 -0.033
y -0.161 6.634 -0.006
z -0.033 -0.006 4.479


<r2> (average value of r2) Å2
<r2> 75.379
(<r2>)1/2 8.682