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All results from a given calculation for CH3CONH2 (Acetamide)

using model chemistry: mPW1PW91/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A'
Energy calculated at mPW1PW91/6-31+G**
 hartrees
Energy at 0K-209.180124
Energy at 298.15K-209.185878
Nuclear repulsion energy121.739198
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 mPW1PW91/6-31+G**
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 3797 3614 48.35      
2 A 3649 3473 41.63      
3 A 3181 3027 5.20      
4 A 3177 3024 12.97      
5 A 3087 2938 7.86      
6 A 1809 1722 417.47      
7 A 1638 1559 121.92      
8 A 1502 1430 14.00      
9 A 1480 1409 9.10      
10 A 1413 1345 98.80      
11 A 1365 1299 89.19      
12 A 1128 1074 0.69      
13 A 1058 1007 5.01      
14 A 994 946 8.80      
15 A 863 821 1.36      
16 A 673 641 11.24      
17 A 546 520 13.02      
18 A 527 501 8.82      
19 A 434 413 4.76      
20 A 234 223 229.44      
21 A 32 30 3.99      

Unscaled Zero Point Vibrational Energy (zpe) 16292.4 cm-1
Scaled (by 0.9518) Zero Point Vibrational Energy (zpe) 15507.2 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 mPW1PW91/6-31+G**
ABC
0.36303 0.30957 0.17242

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/6-31+G**

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.357 -0.346 -0.000
C2 -0.074 0.142 -0.001
N3 -1.034 -0.823 0.000
O4 -0.353 1.330 -0.000
H5 1.851 0.031 0.898
H6 1.455 -1.433 -0.031
H7 1.871 0.085 -0.861
H8 -1.999 -0.535 0.003
H9 -0.818 -1.804 -0.002

Atom - Atom Distances (Å)
  C1 C2 N3 O4 H5 H6 H7 H8 H9
C11.51242.43862.39491.09171.09171.09143.36152.6185
C21.51241.36171.22052.12742.19542.12742.04062.0833
N32.43861.36172.25903.14002.56283.16311.00681.0040
O42.39491.22052.25902.71123.30232.69032.48813.1685
H51.09172.12743.14002.71121.77851.75993.99293.3614
H61.09172.19542.56283.30231.77851.77943.56872.3030
H71.09142.12743.16312.69031.75991.77944.01323.3963
H83.36152.04061.00682.48813.99293.56874.01321.7331
H92.61852.08331.00403.16853.36142.30303.39631.7331

picture of Acetamide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 115.999 C1 C2 O4 122.042
C2 C1 H5 108.476 C2 C1 H6 113.957
C2 C1 H7 108.498 C2 N3 H8 118.214
C2 N3 H9 122.726 N3 C2 O4 121.959
H5 C1 H6 109.085 H5 C1 H7 107.437
H6 C1 H7 109.189 H8 N3 H9 119.060
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.494      
2 C 0.358      
3 N -0.580      
4 O -0.502      
5 H 0.208      
6 H 0.153      
7 H 0.209      
8 H 0.333      
9 H 0.315      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.198 -4.040 0.005 4.045
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.311 2.407 -0.002
y 2.407 -26.479 -0.001
z -0.002 -0.001 -25.281
Traceless
 xyz
x 5.569 2.407 -0.002
y 2.407 -3.683 -0.001
z -0.002 -0.001 -1.886
Polar
3z2-r2-3.771
x2-y26.168
xy2.407
xz-0.002
yz-0.001


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> 75.177
(<r2>)1/2 8.670