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All results from a given calculation for CH3CONH2 (Acetamide)

using model chemistry: wB97X-D/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A'
Energy calculated at wB97X-D/3-21G*
 hartrees
Energy at 0K-207.998786
Energy at 298.15K-208.004965
HF Energy-207.998786
Nuclear repulsion energy120.982297
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 wB97X-D/3-21G*
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 3731 3536 34.01      
2 A 3601 3413 34.26      
3 A 3207 3039 3.50      
4 A 3153 2988 8.77      
5 A 3086 2925 3.85      
6 A 1808 1714 241.38      
7 A 1690 1602 86.48      
8 A 1561 1479 13.14      
9 A 1533 1453 15.76      
10 A 1441 1366 48.81      
11 A 1372 1300 172.50      
12 A 1158 1098 0.41      
13 A 1103 1045 19.73      
14 A 1017 964 5.83      
15 A 834 791 2.11      
16 A 693 657 101.07      
17 A 559 530 141.16      
18 A 553 524 11.58      
19 A 515 488 115.50      
20 A 426 404 3.65      
21 A 84 79 0.15      

Unscaled Zero Point Vibrational Energy (zpe) 16560.7 cm-1
Scaled (by 0.9478) Zero Point Vibrational Energy (zpe) 15696.2 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 wB97X-D/3-21G*
ABC
0.35175 0.31101 0.17038

See section I.F.4 to change rotational constant units
Geometric Data calculated at wB97X-D/3-21G*

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -1.379 -0.252 -0.000
C2 0.091 0.160 -0.004
N3 0.943 -0.917 -0.017
O4 0.473 1.328 0.005
H5 -1.985 0.650 -0.061
H6 -1.602 -0.903 -0.853
H7 -1.627 -0.795 0.919
H8 1.938 -0.740 0.030
H9 0.619 -1.869 0.072

Atom - Atom Distances (Å)
  C1 C2 N3 O4 H5 H6 H7 H8 H9
C11.52592.41532.43421.08891.09551.09603.35272.5706
C21.52591.37381.22922.13352.17152.17072.05562.0979
N32.41531.37382.29413.32162.67882.73781.01161.0098
O42.43421.22922.29412.55053.16513.12272.53513.2013
H51.08892.13353.32162.55051.78511.78254.16343.6253
H61.09552.17152.67883.16511.78511.77513.65212.5919
H71.09602.17072.73783.12271.78251.77513.67442.6289
H83.35272.05561.01162.53514.16343.65213.67441.7371
H92.57062.09791.00983.20133.62532.59192.62891.7371

picture of Acetamide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 112.699 C1 C2 O4 123.787
C2 C1 H5 108.197 C2 C1 H6 110.796
C2 C1 H7 110.697 C2 N3 H8 118.232
C2 N3 H9 122.587 N3 C2 O4 123.514
H5 C1 H6 109.614 H5 C1 H7 109.336
H6 C1 H7 108.188 H8 N3 H9 118.488
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at wB97X-D/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.706      
2 C 0.634      
3 N -0.800      
4 O -0.512      
5 H 0.255      
6 H 0.230      
7 H 0.230      
8 H 0.339      
9 H 0.331      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.335 -3.866 -0.001 3.880
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.477 -2.634 -0.000
y -2.634 -24.803 0.001
z -0.000 0.001 -24.498
Traceless
 xyz
x 4.173 -2.634 -0.000
y -2.634 -2.316 0.001
z -0.000 0.001 -1.857
Polar
3z2-r2-3.715
x2-y24.326
xy-2.634
xz-0.000
yz0.001


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.288 -0.013 0.000
y -0.013 4.881 0.000
z 0.000 0.000 2.407


<r2> (average value of r2) Å2
<r2> 75.271
(<r2>)1/2 8.676