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All results from a given calculation for CH3CONH2 (Acetamide)

using model chemistry: PBEPBE/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A'
Energy calculated at PBEPBE/6-31+G**
 hartrees
Energy at 0K-208.987986
Energy at 298.15K-208.993606
Nuclear repulsion energy120.578083
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 PBEPBE/6-31+G**
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 3661 3619 33.58      
2 A 3516 3476 24.36      
3 A 3085 3050 2.93      
4 A 3083 3047 16.35      
5 A 2996 2961 9.48      
6 A 1721 1702 370.87      
7 A 1572 1554 99.62      
8 A 1447 1431 10.36      
9 A 1427 1411 9.51      
10 A 1352 1337 76.03      
11 A 1308 1293 102.28      
12 A 1080 1068 0.46      
13 A 1013 1002 3.06      
14 A 950 939 7.87      
15 A 827 818 2.12      
16 A 651 644 7.34      
17 A 524 518 10.59      
18 A 508 502 9.75      
19 A 419 415 4.56      
20 A 200 198 208.32      
21 A 39 38 4.03      

Unscaled Zero Point Vibrational Energy (zpe) 15689.5 cm-1
Scaled (by 0.9886) Zero Point Vibrational Energy (zpe) 15510.6 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 PBEPBE/6-31+G**
ABC
0.35527 0.30463 0.16922

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -1.370 -0.343 -0.000
C2 0.074 0.143 -0.000
N3 1.037 -0.838 -0.000
O4 0.365 1.344 0.000
H5 -1.880 0.073 -0.882
H6 -1.476 -1.439 -0.007
H7 -1.875 0.061 0.891
H8 2.013 -0.554 0.001
H9 0.814 -1.828 0.000

Atom - Atom Distances (Å)
  C1 C2 N3 O4 H5 H6 H7 H8 H9
C11.52322.45652.41961.10101.10141.10113.38912.6404
C21.52321.37461.23512.14482.21522.14482.06052.1054
N32.45651.37462.28233.18032.58373.17501.01701.0146
O42.41961.23512.28232.72643.33682.73132.51263.2028
H51.10102.14483.18032.72641.79341.77344.04073.4129
H61.10142.21522.58373.33681.79341.79323.59982.3227
H71.10112.14483.17502.73131.77341.79324.03583.4046
H83.38912.06051.01702.51264.04073.59984.03581.7498
H92.64042.10541.01463.20283.41292.32273.40461.7498

picture of Acetamide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 115.834 C1 C2 O4 122.272
C2 C1 H5 108.563 C2 C1 H6 114.174
C2 C1 H7 108.560 C2 N3 H8 118.216
C2 N3 H9 122.862 N3 C2 O4 121.894
H5 C1 H6 109.035 H5 C1 H7 107.278
H6 C1 H7 109.012 H8 N3 H9 118.922
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.521      
2 C 0.327      
3 N -0.524      
4 O -0.470      
5 H 0.208      
6 H 0.153      
7 H 0.208      
8 H 0.319      
9 H 0.301      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.155 -3.938 0.003 3.941
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.718 -2.464 0.003
y -2.464 -26.659 -0.003
z 0.003 -0.003 -25.637
Traceless
 xyz
x 5.429 -2.464 0.003
y -2.464 -3.481 -0.003
z 0.003 -0.003 -1.949
Polar
3z2-r2-3.897
x2-y25.940
xy-2.464
xz0.003
yz-0.003


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.361 -0.265 -0.001
y -0.265 6.606 0.000
z -0.001 0.000 4.204


<r2> (average value of r2) Å2
<r2> 76.505
(<r2>)1/2 8.747