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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-40.156207
Energy at 298.15K-40.162233
Nuclear repulsion energy67.195718
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
(Å4/u)
Dep P Dep U
1 A 3721 3626 16.26      
2 A 3561 3471 19.71      
3 A 3108 3029 29.86      
4 A 3108 3028 12.71      
5 A 3012 2935 13.82      
6 A 1674 1632 292.11      
7 A 1638 1596 103.85      
8 A 1511 1473 15.58      
9 A 1494 1456 11.92      
10 A 1431 1394 42.44      
11 A 1357 1323 171.97      
12 A 1120 1091 1.70      
13 A 1077 1049 8.48      
14 A 1002 976 11.61      
15 A 837 816 0.39      
16 A 670 653 102.44      
17 A 540 527 139.79      
18 A 523 509 14.40      
19 A 488 476 93.02      
20 A 424 413 5.35      
21 A 30 29 3.69      

Unscaled Zero Point Vibrational Energy (zpe) 16162.4 cm-1
Scaled (by 0.9745) Zero Point Vibrational Energy (zpe) 15750.3 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
0.34677 0.29911 0.16556

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 1.367 -0.356 -0.000
C2 -0.075 0.165 -0.000
N3 -1.076 -0.796 -0.000
O4 -0.346 1.399 0.000
H5 1.884 0.034 0.884
H6 1.433 -1.450 -0.001
H7 1.884 0.036 -0.883
H8 -2.039 -0.483 0.000
H9 -0.879 -1.786 0.000

Atom - Atom Distances (Å)
  C1 C2 N3 O4 H5 H6 H7 H8 H9
C11.53282.48292.45221.09581.09601.09583.40842.6634
C21.53281.38801.26392.15262.20882.15262.06832.1103
N32.48291.38802.31373.19882.59293.19961.01201.0094
O42.45221.26392.31372.75953.35842.75862.53193.2297
H51.09582.15263.19882.75951.78581.76744.05393.4249
H61.09602.20882.59293.35841.78581.78583.60362.3367
H71.09582.15263.19962.75861.76741.78584.05473.4262
H83.40842.06831.01202.53194.05393.60364.05471.7439
H92.66342.11031.00943.22973.42492.33673.42621.7439

picture of Acetamide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 116.346 C1 C2 O4 122.227
C2 C1 H5 108.814 C2 C1 H6 113.282
C2 C1 H7 108.812 C2 N3 H8 118.190
C2 N3 H9 122.564 N3 C2 O4 121.426
H5 C1 H6 109.132 H5 C1 H7 107.506
H6 C1 H7 109.135 H8 N3 H9 119.246
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 -0.612      
2 C 0.169      
3 N -0.509      
4 O -0.204      
5 H 0.189      
6 H 0.139      
7 H 0.189      
8 H 0.326      
9 H 0.313      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.156 -4.333 0.000 4.336
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.065 2.565 -0.000
y 2.565 -27.311 -0.000
z -0.000 -0.000 -25.315
Traceless
 xyz
x 6.248 2.565 -0.000
y 2.565 -4.621 -0.000
z -0.000 -0.000 -1.627
Polar
3z2-r2-3.254
x2-y27.246
xy2.565
xz-0.000
yz-0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.425 0.222 0.001
y 0.222 5.897 0.001
z 0.001 0.001 3.419


<r2> (average value of r2) Å2
<r2> 65.843
(<r2>)1/2 8.114