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All results from a given calculation for CH3CONH2 (Acetamide)

using model chemistry: B3PW91/cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A'
Energy calculated at B3PW91/cc-pVTZ
 hartrees
Energy at 0K-209.219524
Energy at 298.15K-209.225179
Nuclear repulsion energy121.981081
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 B3PW91/cc-pVTZ
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 3753 3609 36.30      
2 A 3612 3473 32.26      
3 A 3141 3020 9.51      
4 A 3131 3011 11.16      
5 A 3054 2937 7.44      
6 A 1791 1722 345.30      
7 A 1615 1553 106.52      
8 A 1486 1429 11.15      
9 A 1465 1409 7.48      
10 A 1393 1340 83.17      
11 A 1347 1295 92.05      
12 A 1118 1075 0.26      
13 A 1049 1009 4.51      
14 A 982 944 7.87      
15 A 849 816 2.32      
16 A 675 649 8.98      
17 A 544 523 13.32      
18 A 524 504 5.92      
19 A 428 411 4.75      
20 A 170 163 181.05      
21 A 30 29 5.06      

Unscaled Zero Point Vibrational Energy (zpe) 16078.0 cm-1
Scaled (by 0.9616) Zero Point Vibrational Energy (zpe) 15460.6 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 B3PW91/cc-pVTZ
ABC
0.36410 0.31085 0.17304

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/cc-pVTZ

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -1.356 -0.343 -0.000
C2 0.076 0.145 -0.003
N3 1.030 -0.825 -0.002
O4 0.355 1.327 0.000
H5 -1.891 0.152 -0.809
H6 -1.455 -1.423 -0.110
H7 -1.823 -0.038 0.936
H8 1.995 -0.544 0.013
H9 0.805 -1.801 0.004

Atom - Atom Distances (Å)
  C1 C2 N3 O4 H5 H6 H7 H8 H9
C11.51262.43332.39091.08941.09011.09063.35622.6061
C21.51261.36051.21422.12612.19482.12672.03902.0786
N32.43331.36052.25523.18402.55833.10481.00511.0020
O42.39091.21422.25522.66133.29462.73562.48813.1605
H51.08942.12613.18402.66131.77771.75704.03273.4271
H61.09012.19482.55833.29461.77771.77493.56232.2942
H71.09062.12673.10482.73561.75701.77493.96043.2994
H83.35622.03901.00512.48814.03273.56233.96041.7309
H92.60612.07861.00203.16053.42712.29423.29941.7309

picture of Acetamide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 115.654 C1 C2 O4 122.141
C2 C1 H5 108.494 C2 C1 H6 113.990
C2 C1 H7 108.476 C2 N3 H8 118.293
C2 N3 H9 122.519 N3 C2 O4 122.204
H5 C1 H6 109.306 H5 C1 H7 107.409
H6 C1 H7 108.962 H8 N3 H9 119.175
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.276      
2 C 0.221      
3 N -0.223      
4 O -0.340      
5 H 0.115      
6 H 0.074      
7 H 0.114      
8 H 0.161      
9 H 0.155      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.065 -3.817 0.043 3.818
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.229 -2.342 0.043
y -2.342 -25.846 -0.047
z 0.043 -0.047 -24.740
Traceless
 xyz
x 5.064 -2.342 0.043
y -2.342 -3.362 -0.047
z 0.043 -0.047 -1.702
Polar
3z2-r2-3.403
x2-y25.617
xy-2.342
xz0.043
yz-0.047


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> 74.699
(<r2>)1/2 8.643