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All results from a given calculation for CH3CONH2 (Acetamide)

using model chemistry: PBEPBE/6-311G*

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/6-311G*
 hartrees
Energy at 0K-209.017733
Energy at 298.15K-209.023302
Nuclear repulsion energy120.893700
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/6-311G*
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 3648 3610 16.29      
2 A 3513 3477 13.26      
3 A 3066 3034 7.50      
4 A 3063 3031 23.97      
5 A 2985 2954 12.16      
6 A 1745 1727 308.11      
7 A 1605 1588 93.31      
8 A 1461 1446 11.16      
9 A 1441 1426 9.96      
10 A 1361 1347 63.51      
11 A 1315 1301 105.65      
12 A 1098 1087 0.13      
13 A 1022 1011 5.42      
14 A 954 944 6.82      
15 A 823 815 3.04      
16 A 670 663 12.13      
17 A 525 520 12.14      
18 A 511 506 10.78      
19 A 418 414 4.44      
20 A 172 170 207.39      
21 A 25 25 16.37      

Unscaled Zero Point Vibrational Energy (zpe) 15710.7 cm-1
Scaled (by 0.9896) Zero Point Vibrational Energy (zpe) 15547.3 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 PBEPBE/6-311G*
ABC
0.35665 0.30626 0.17000

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/6-311G*

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -1.366 -0.342 -0.000
C2 0.078 0.148 -0.000
N3 1.032 -0.838 -0.000
O4 0.365 1.339 0.000
H5 -1.877 0.071 -0.882
H6 -1.481 -1.436 -0.004
H7 -1.875 0.065 0.886
H8 2.008 -0.559 0.001
H9 0.810 -1.826 0.001

Atom - Atom Distances (Å)
  C1 C2 N3 O4 H5 H6 H7 H8 H9
C11.52422.44852.41301.09951.10021.09953.38052.6333
C21.52421.37231.22562.14542.22212.14552.05582.1052
N32.44851.37232.27733.17232.58293.17001.01491.0124
O42.41301.22562.27732.72273.33332.72522.51073.1963
H51.09952.14543.17232.72271.78841.76764.03293.4046
H61.10022.22212.58293.33331.78841.78843.59702.3233
H71.09952.14553.17002.72521.76761.78844.03083.4005
H83.38052.05581.01492.51074.03293.59704.03081.7434
H92.63332.10521.01243.19633.40462.32333.40051.7434

picture of Acetamide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 115.316 C1 C2 O4 122.316
C2 C1 H5 108.628 C2 C1 H6 114.748
C2 C1 H7 108.637 C2 N3 H8 118.122
C2 N3 H9 123.250 N3 C2 O4 122.367
H5 C1 H6 108.783 H5 C1 H7 106.995
H6 C1 H7 108.777 H8 N3 H9 118.629
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.728      
2 C 0.424      
3 N -0.750      
4 O -0.335      
5 H 0.247      
6 H 0.206      
7 H 0.247      
8 H 0.345      
9 H 0.344      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.069 -3.686 0.003 3.687
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.528 -2.430 0.003
y -2.430 -25.618 -0.004
z 0.003 -0.004 -25.052
Traceless
 xyz
x 4.807 -2.430 0.003
y -2.430 -2.828 -0.004
z 0.003 -0.004 -1.979
Polar
3z2-r2-3.957
x2-y25.090
xy-2.430
xz0.003
yz-0.004


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.783 -0.248 0.000
y -0.248 5.766 -0.000
z 0.000 -0.000 3.342


<r2> (average value of r2) Å2
<r2> 75.870
(<r2>)1/2 8.710