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All results from a given calculation for CH3CONH2 (Acetamide)

using model chemistry: B3LYP/CEP-121G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A'
Energy calculated at B3LYP/CEP-121G*
 hartrees
Energy at 0K-40.218280
Energy at 298.15K-40.223964
Nuclear repulsion energy67.749933
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 B3LYP/CEP-121G*
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 3698 3585 18.97      
2 A 3563 3454 20.25      
3 A 3123 3027 16.38      
4 A 3109 3014 24.31      
5 A 3035 2942 12.66      
6 A 1751 1697 358.47      
7 A 1635 1585 84.78      
8 A 1500 1454 8.45      
9 A 1483 1438 8.18      
10 A 1407 1364 50.57      
11 A 1326 1286 139.56      
12 A 1118 1084 0.28      
13 A 1050 1018 3.52      
14 A 975 945 12.66      
15 A 828 802 2.18      
16 A 649 629 15.22      
17 A 535 519 16.94      
18 A 505 490 9.84      
19 A 420 407 4.27      
20 A 215 209 238.93      
21 A 46 44 7.18      

Unscaled Zero Point Vibrational Energy (zpe) 15984.6 cm-1
Scaled (by 0.9694) Zero Point Vibrational Energy (zpe) 15495.4 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 B3LYP/CEP-121G*
ABC
0.35524 0.30217 0.16855

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/CEP-121G*

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -1.359 -0.356 -0.000
C2 0.080 0.175 -0.005
N3 1.074 -0.786 -0.046
O4 0.336 1.378 0.007
H5 -1.919 0.153 -0.791
H6 -1.429 -1.440 -0.148
H7 -1.825 -0.094 0.957
H8 2.028 -0.468 0.075
H9 0.875 -1.764 0.117

Atom - Atom Distances (Å)
  C1 C2 N3 O4 H5 H6 H7 H8 H9
C11.53402.47042.42501.09481.09621.09653.39002.6426
C21.53401.38301.22922.14802.21552.15132.05352.0992
N32.47041.38302.28603.22352.58883.14471.01361.0112
O42.42501.22922.28602.68753.32892.78212.50473.1889
H51.09482.14803.22352.68751.78661.76734.08863.5076
H61.09622.21552.58883.32891.78661.78633.59862.3415
H71.09652.15133.14472.78211.76731.78633.97123.2841
H83.39002.05351.01362.50474.08863.59863.97121.7354
H92.64262.09921.01123.18893.50762.34153.28411.7354

picture of Acetamide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 115.657 C1 C2 O4 122.325
C2 C1 H5 108.435 C2 C1 H6 113.736
C2 C1 H7 108.594 C2 N3 H8 117.087
C2 N3 H9 121.740 N3 C2 O4 122.010
H5 C1 H6 109.262 H5 C1 H7 107.520
H6 C1 H7 109.111 H8 N3 H9 117.971
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/CEP-121G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.636      
2 C 0.284      
3 N -0.567      
4 O -0.315      
5 H 0.198      
6 H 0.156      
7 H 0.194      
8 H 0.345      
9 H 0.340      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.036 -3.852 0.460 3.879
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.274 -2.247 0.665
y -2.247 -26.389 -0.691
z 0.665 -0.691 -25.061
Traceless
 xyz
x 5.451 -2.247 0.665
y -2.247 -3.722 -0.691
z 0.665 -0.691 -1.729
Polar
3z2-r2-3.458
x2-y26.115
xy-2.247
xz0.665
yz-0.691


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.659 -0.201 -0.000
y -0.201 5.818 -0.003
z -0.000 -0.003 3.607


<r2> (average value of r2) Å2
<r2> 64.855
(<r2>)1/2 8.053