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All results from a given calculation for CH3CONH2 (Acetamide)

using model chemistry: mPW1PW91/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 mPW1PW91/aug-cc-pVDZ
 hartrees
Energy at 0K-209.197309
Energy at 298.15K-209.203035
Nuclear repulsion energy121.720039
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 mPW1PW91/aug-cc-pVDZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A 3774 3617 40.14      
2 A 3628 3477 35.46      
3 A 3188 3055 6.17      
4 A 3153 3022 11.51      
5 A 3072 2943 6.91      
6 A 1791 1716 383.66      
7 A 1623 1556 112.63      
8 A 1469 1407 15.80      
9 A 1447 1387 9.74      
10 A 1395 1337 120.95      
11 A 1340 1284 43.50      
12 A 1116 1070 0.44      
13 A 1040 996 3.82      
14 A 979 938 7.78      
15 A 864 828 1.31      
16 A 662 634 8.07      
17 A 548 525 14.35      
18 A 522 500 6.74      
19 A 423 405 4.39      
20 A 208 199 187.28      
21 A 41 39 2.12      

Unscaled Zero Point Vibrational Energy (zpe) 16141.1 cm-1
Scaled (by 0.9583) Zero Point Vibrational Energy (zpe) 15468.0 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 mPW1PW91/aug-cc-pVDZ
ABC
0.36223 0.31034 0.17255

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/aug-cc-pVDZ

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -1.361 -0.328 -0.001
C2 0.074 0.145 -0.009
N3 1.019 -0.837 -0.003
O4 0.374 1.327 0.000
H5 -1.967 0.380 -0.573
H6 -1.482 -1.338 -0.411
H7 -1.724 -0.327 1.035
H8 1.989 -0.567 0.036
H9 0.783 -1.813 -0.004

Atom - Atom Distances (Å)
  C1 C2 N3 O4 H5 H6 H7 H8 H9
C11.51082.43392.39811.09341.09631.09773.35872.6079
C21.51081.36331.21952.13002.18692.13212.04402.0832
N32.43391.36332.25823.27442.58372.97731.00751.0051
O42.39811.21952.25822.58973.27382.86512.48943.1673
H51.09342.13003.27442.58971.79191.77264.11303.5631
H61.09632.18692.58373.27381.79191.78073.58402.3501
H71.09772.13212.97732.86511.77261.78073.85293.0941
H83.35872.04401.00752.48944.11303.58403.85291.7354
H92.60792.08321.00513.16733.56312.35013.09411.7354

picture of Acetamide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 115.641 C1 C2 O4 122.521
C2 C1 H5 108.689 C2 C1 H6 113.065
C2 C1 H7 108.613 C2 N3 H8 118.347
C2 N3 H9 122.473 N3 C2 O4 121.827
H5 C1 H6 109.839 H5 C1 H7 107.997
H6 C1 H7 108.511 H8 N3 H9 119.144
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/aug-cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.361      
2 C 0.602      
3 N -0.037      
4 O -0.629      
5 H -0.054      
6 H -0.147      
7 H 0.005      
8 H -0.057      
9 H -0.043      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.237 -3.931 0.078 3.939
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.554 -2.377 0.105
y -2.377 -26.395 -0.074
z 0.105 -0.074 -25.153
Traceless
 xyz
x 5.220 -2.377 0.105
y -2.377 -3.541 -0.074
z 0.105 -0.074 -1.678
Polar
3z2-r2-3.357
x2-y25.840
xy-2.377
xz0.105
yz-0.074


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.375 -0.156 -0.032
y -0.156 6.562 -0.007
z -0.032 -0.007 4.449


<r2> (average value of r2) Å2
<r2> 75.144
(<r2>)1/2 8.669