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All results from a given calculation for CH3CONH2 (Acetamide)

using model chemistry: HF/CEP-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 HF/CEP-31G*
 hartrees
Energy at 0K-39.280849
Energy at 298.15K-39.286789
Nuclear repulsion energy68.382850
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 HF/CEP-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 3971 3566 46.24      
2 A 3833 3442 47.85      
3 A 3344 3003 25.17      
4 A 3312 2974 40.43      
5 A 3243 2912 16.49      
6 A 1956 1757 517.22      
7 A 1784 1602 110.23      
8 A 1618 1453 7.94      
9 A 1602 1439 6.91      
10 A 1549 1391 72.09      
11 A 1443 1296 158.38      
12 A 1228 1102 0.74      
13 A 1157 1039 9.22      
14 A 1073 963 16.21      
15 A 913 820 1.71      
16 A 691 620 29.75      
17 A 588 528 29.09      
18 A 542 487 10.40      
19 A 446 401 5.10      
20 A 286 257 310.16      
21 A 37 33 5.17      

Unscaled Zero Point Vibrational Energy (zpe) 17308.2 cm-1
Scaled (by 0.898) Zero Point Vibrational Energy (zpe) 15542.7 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 HF/CEP-31G*
ABC
0.36341 0.30576 0.17156

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -1.354 -0.349 -0.001
C2 0.081 0.178 -0.012
N3 1.067 -0.778 -0.056
O4 0.336 1.360 0.009
H5 -1.975 0.326 -0.584
H6 -1.430 -1.361 -0.399
H7 -1.715 -0.345 1.029
H8 2.005 -0.467 0.103
H9 0.859 -1.737 0.132

Atom - Atom Distances (Å)
  C1 C2 N3 O4 H5 H6 H7 H8 H9
C11.52862.45912.40331.08711.08971.09103.36242.6157
C21.52861.37401.20962.13902.19102.14082.03232.0720
N32.45911.37402.26103.27882.58703.01741.00120.9987
O42.40331.20962.26102.59983.26922.85542.47653.1435
H51.08712.13903.27882.59981.78221.76594.11573.5779
H61.08972.19102.58703.26921.78221.77513.58502.3804
H71.09102.14083.01742.85541.76591.77513.83563.0611
H83.36242.03231.00122.47654.11573.58503.83561.7108
H92.61572.07200.99873.14353.57792.38043.06111.7108

picture of Acetamide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 115.712 C1 C2 O4 122.303
C2 C1 H5 108.544 C2 C1 H6 112.529
C2 C1 H7 108.461 C2 N3 H8 116.787
C2 N3 H9 120.853 N3 C2 O4 121.984
H5 C1 H6 109.908 H5 C1 H7 108.335
H6 C1 H7 108.969 H8 N3 H9 117.614
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.339      
2 C 0.026      
3 N -0.555      
4 O -0.262      
5 H 0.157      
6 H 0.110      
7 H 0.131      
8 H 0.373      
9 H 0.359      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.302 -4.137 0.641 4.197
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.294 -2.155 0.942
y -2.155 -26.877 -0.915
z 0.942 -0.915 -24.868
Traceless
 xyz
x 5.579 -2.155 0.942
y -2.155 -4.296 -0.915
z 0.942 -0.915 -1.283
Polar
3z2-r2-2.566
x2-y26.584
xy-2.155
xz0.942
yz-0.915


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.557 -0.037 -0.028
y -0.037 5.008 0.011
z -0.028 0.011 3.102


<r2> (average value of r2) Å2
<r2> 64.026
(<r2>)1/2 8.002