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All results from a given calculation for CH3CONH2 (Acetamide)

using model chemistry: HF/6-31G*

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/6-31G*
 hartrees
Energy at 0K-207.976012
Energy at 298.15K-207.981922
HF Energy-207.976012
Nuclear repulsion energy122.711663
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/6-31G*
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 3966 3563 51.44      
2 A 3837 3448 50.18      
3 A 3336 2997 10.54      
4 A 3275 2943 21.14      
5 A 3216 2889 8.94      
6 A 1988 1786 439.78      
7 A 1799 1616 120.42      
8 A 1629 1464 7.29      
9 A 1617 1453 8.15      
10 A 1562 1404 72.26      
11 A 1464 1315 149.17      
12 A 1242 1116 0.86      
13 A 1169 1051 9.43      
14 A 1079 969 13.65      
15 A 915 822 0.88      
16 A 696 626 28.58      
17 A 601 540 24.75      
18 A 554 497 6.24      
19 A 448 403 4.34      
20 A 229 205 306.40      
21 A 47 42 0.70      

Unscaled Zero Point Vibrational Energy (zpe) 17334.2 cm-1
Scaled (by 0.8985) Zero Point Vibrational Energy (zpe) 15574.8 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 HF/6-31G*
ABC
0.36876 0.31315 0.17491

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -1.361 -0.312 -0.000
C2 0.079 0.153 -0.008
N3 1.005 -0.840 -0.032
O4 0.385 1.311 0.006
H5 -2.001 0.523 -0.243
H6 -1.524 -1.117 -0.709
H7 -1.621 -0.677 0.989
H8 1.960 -0.586 0.085
H9 0.757 -1.792 0.104

Atom - Atom Distances (Å)
  C1 C2 N3 O4 H5 H6 H7 H8 H9
C11.51362.42462.38421.07991.08461.08613.33372.5857
C21.51361.35851.19722.12562.16232.13852.02352.0632
N32.42461.35852.23883.30752.63312.82220.99530.9931
O42.38421.19722.23882.52513.17022.99032.46673.1266
H51.07992.12563.30752.52511.77021.76134.12663.6173
H61.08462.16232.63313.17021.77021.75743.61322.5140
H71.08612.13852.82222.99031.76131.75743.69452.7715
H83.33372.02350.99532.46674.12663.61323.69451.7039
H92.58572.06320.99313.12663.61732.51402.77151.7039

picture of Acetamide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 115.064 C1 C2 O4 122.737
C2 C1 H5 108.936 C2 C1 H6 111.594
C2 C1 H7 109.594 C2 N3 H8 117.736
C2 N3 H9 121.883 N3 C2 O4 122.199
H5 C1 H6 109.746 H5 C1 H7 108.810
H6 C1 H7 108.118 H8 N3 H9 117.947
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.593      
2 C 0.723      
3 N -0.908      
4 O -0.589      
5 H 0.217      
6 H 0.181      
7 H 0.191      
8 H 0.394      
9 H 0.383      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.394 -3.977 0.475 4.025
CHELPG -0.399 -4.007 0.480 4.056
AIM 1.347 1.046 -0.033 1.706
ESP -0.416 -3.999 0.493 4.050


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.573 -2.229 0.641
y -2.229 -26.079 -0.702
z 0.641 -0.702 -24.752
Traceless
 xyz
x 4.843 -2.229 0.641
y -2.229 -3.417 -0.702
z 0.641 -0.702 -1.426
Polar
3z2-r2-2.851
x2-y25.506
xy-2.229
xz0.641
yz-0.702


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.363 -0.029 0.002
y -0.029 4.935 -0.007
z 0.002 -0.007 2.865


<r2> (average value of r2) Å2
<r2> 74.160
(<r2>)1/2 8.612