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All results from a given calculation for CH3CONH2 (Acetamide)

using model chemistry: B3PW91/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A'
Energy calculated at B3PW91/6-31G**
 hartrees
Energy at 0K-209.144709
Energy at 298.15K-209.150331
Nuclear repulsion energy121.553993
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 B3PW91/6-31G**
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 3779 3621 37.33      
2 A 3633 3481 34.12      
3 A 3167 3035 8.75      
4 A 3157 3025 13.82      
5 A 3070 2943 7.38      
6 A 1827 1751 319.10      
7 A 1627 1560 118.49      
8 A 1500 1438 11.75      
9 A 1480 1418 6.36      
10 A 1408 1350 81.20      
11 A 1358 1301 86.06      
12 A 1123 1076 0.66      
13 A 1054 1010 8.58      
14 A 986 945 5.34      
15 A 852 816 1.87      
16 A 677 649 15.70      
17 A 541 518 13.48      
18 A 523 501 8.48      
19 A 429 411 4.75      
20 A 158 151 229.39      
21 A 33 32 6.74      

Unscaled Zero Point Vibrational Energy (zpe) 16189.6 cm-1
Scaled (by 0.9584) Zero Point Vibrational Energy (zpe) 15516.1 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 B3PW91/6-31G**
ABC
0.36096 0.30910 0.17182

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-31G**

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.361 -0.338 -0.000
C2 -0.078 0.146 -0.003
N3 -1.026 -0.834 -0.002
O4 -0.365 1.331 0.000
H5 1.832 -0.028 0.937
H6 1.470 -1.420 -0.109
H7 1.896 0.159 -0.813
H8 -1.994 -0.555 0.013
H9 -0.801 -1.813 0.003

Atom - Atom Distances (Å)
  C1 C2 N3 O4 H5 H6 H7 H8 H9
C11.51792.43872.40131.09351.09331.09233.36262.6174
C21.51791.36411.22002.13532.20412.13322.04082.0883
N32.43871.36412.26433.11472.56643.19151.00761.0049
O42.40131.22002.26432.74763.30912.67362.49233.1747
H51.09352.13533.11472.74761.77871.76063.97133.3152
H61.09332.20412.56643.30911.77871.78113.57282.3070
H71.09232.13323.19152.67361.76061.78114.04073.4394
H83.36262.04081.00762.49233.97133.57284.04071.7348
H92.61742.08831.00493.17473.31522.30703.43941.7348

picture of Acetamide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 115.501 C1 C2 O4 122.208
C2 C1 H5 108.618 C2 C1 H6 114.169
C2 C1 H7 108.517 C2 N3 H8 117.968
C2 N3 H9 122.935 N3 C2 O4 122.289
H5 C1 H6 108.856 H5 C1 H7 107.304
H6 C1 H7 109.160 H8 N3 H9 119.086
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.466      
2 C 0.564      
3 N -0.646      
4 O -0.502      
5 H 0.172      
6 H 0.120      
7 H 0.173      
8 H 0.297      
9 H 0.286      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.061 -3.746 0.051 3.747
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.824 2.375 -0.032
y 2.375 -25.285 -0.055
z -0.032 -0.055 -24.416
Traceless
 xyz
x 5.027 2.375 -0.032
y 2.375 -3.165 -0.055
z -0.032 -0.055 -1.861
Polar
3z2-r2-3.723
x2-y25.461
xy2.375
xz-0.032
yz-0.055


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> 74.852
(<r2>)1/2 8.652