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All results from a given calculation for CH3CONH2 (Acetamide)

using model chemistry: HF/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A'
Energy calculated at HF/3-21G*
 hartrees
Energy at 0K-206.815803
Energy at 298.15K-206.822178
Nuclear repulsion energy122.121208
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 HF/3-21G*
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 3908 3528 49.65      
2 A 3780 3412 45.07      
3 A 3326 3002 5.23      
4 A 3264 2946 11.66      
5 A 3211 2898 5.16      
6 A 1918 1731 324.34      
7 A 1812 1636 94.62      
8 A 1657 1496 10.58      
9 A 1635 1476 14.53      
10 A 1556 1404 37.37      
11 A 1440 1300 230.64      
12 A 1243 1122 0.79      
13 A 1191 1075 25.58      
14 A 1088 982 16.13      
15 A 875 789 0.69      
16 A 734 662 167.01      
17 A 596 538 141.38      
18 A 591 533 18.97      
19 A 530 479 115.47      
20 A 448 404 3.76      
21 A 110 99 0.02      

Unscaled Zero Point Vibrational Energy (zpe) 17455.5 cm-1
Scaled (by 0.9026) Zero Point Vibrational Energy (zpe) 15755.4 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 HF/3-21G*
ABC
0.36008 0.31464 0.17330

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/3-21G*

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.370 -0.274 0.000
C2 -0.085 0.155 -0.000
N3 -0.964 -0.882 -0.000
O4 -0.439 1.317 0.000
H5 1.991 0.607 -0.000
H6 1.586 -0.870 0.880
H7 1.586 -0.870 -0.880
H8 -1.941 -0.682 0.000
H9 -0.672 -1.833 0.000

Atom - Atom Distances (Å)
  C1 C2 N3 O4 H5 H6 H7 H8 H9
C11.51622.41182.40921.07841.08431.08433.33612.5685
C21.51621.35951.21552.12472.14792.14792.03662.0721
N32.41181.35952.26103.30952.69742.69740.99740.9944
O42.40921.21552.26102.53223.10753.10772.50083.1583
H51.07842.12473.30952.53221.76631.76634.13873.6118
H61.08432.14792.69743.10751.76631.75963.63992.6074
H71.08432.14792.69743.10771.76631.75963.64002.6072
H83.33612.03660.99742.50084.13873.63993.64001.7130
H92.56852.07210.99443.15833.61182.60742.60721.7130

picture of Acetamide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 113.891 C1 C2 O4 123.387
C2 C1 H5 108.779 C2 C1 H6 110.267
C2 C1 H7 110.269 C2 N3 H8 118.760
C2 N3 H9 122.598 N3 C2 O4 122.721
H5 C1 H6 109.520 H5 C1 H7 109.519
H6 C1 H7 108.474 H8 N3 H9 118.642
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.691 -0.560    
2 C 0.816 1.029    
3 N -0.930 -1.129    
4 O -0.625 -0.669    
5 H 0.258 0.145    
6 H 0.230 0.148    
7 H 0.230 0.148    
8 H 0.361 0.453    
9 H 0.351 0.435    


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.546 -4.069 0.000 4.106
CHELPG 0.540 -4.076 0.000 4.111
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.794 2.479 -0.001
y 2.479 -26.145 -0.001
z -0.001 -0.001 -24.762
Traceless
 xyz
x 4.659 2.479 -0.001
y 2.479 -3.367 -0.001
z -0.001 -0.001 -1.293
Polar
3z2-r2-2.585
x2-y25.351
xy2.479
xz-0.001
yz-0.001


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.958 -0.049 -0.000
y -0.049 4.654 0.000
z -0.000 0.000 2.328


<r2> (average value of r2) Å2
<r2> 74.666
(<r2>)1/2 8.641