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All results from a given calculation for CH3CONH2 (Acetamide)

using model chemistry: B1B95/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A'
Energy calculated at B1B95/6-311G*
 hartrees
Energy at 0K-209.176201
Energy at 298.15K-209.181868
Nuclear repulsion energy122.044518
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 B1B95/6-311G*
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 3769 3613 26.30      
2 A 3631 3481 27.11      
3 A 3153 3023 7.19      
4 A 3151 3020 23.94      
5 A 3070 2942 9.77      
6 A 1822 1747 360.80      
7 A 1660 1592 112.79      
8 A 1507 1444 13.50      
9 A 1485 1424 9.18      
10 A 1411 1352 89.43      
11 A 1362 1305 93.79      
12 A 1135 1088 0.33      
13 A 1058 1014 6.85      
14 A 990 949 7.99      
15 A 856 820 1.87      
16 A 686 657 15.53      
17 A 542 520 14.20      
18 A 525 504 9.53      
19 A 426 409 4.34      
20 A 196 188 227.86      
21 A 18 17 13.14      

Unscaled Zero Point Vibrational Energy (zpe) 16226.2 cm-1
Scaled (by 0.9586) Zero Point Vibrational Energy (zpe) 15554.4 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 B1B95/6-311G*
ABC
0.36406 0.31146 0.17321

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/6-311G*

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.353 -0.345 -0.000
C2 -0.077 0.147 -0.000
N3 -1.029 -0.824 0.000
O4 -0.352 1.327 -0.000
H5 1.859 0.056 0.878
H6 1.455 -1.431 -0.001
H7 1.859 0.058 -0.877
H8 -1.994 -0.543 -0.000
H9 -0.812 -1.802 -0.000

Atom - Atom Distances (Å)
  C1 C2 N3 O4 H5 H6 H7 H8 H9
C11.51212.42972.38871.08981.09031.08983.35322.6098
C21.51211.36021.21182.12722.19942.12722.03832.0836
N32.42971.36022.25503.14432.55773.14501.00501.0021
O42.38871.21182.25502.69733.29782.69672.48923.1631
H51.08982.12723.14432.69731.77381.75423.99733.3707
H61.09032.19942.55773.29781.77381.77393.56212.2980
H71.08982.12723.14502.69671.75421.77393.99783.3715
H83.35322.03831.00502.48923.99733.56213.99781.7267
H92.60982.08361.00213.16313.37072.29803.37151.7267

picture of Acetamide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 115.440 C1 C2 O4 122.163
C2 C1 H5 108.600 C2 C1 H6 114.403
C2 C1 H7 108.600 C2 N3 H8 118.258
C2 N3 H9 123.052 N3 C2 O4 122.396
H5 C1 H6 108.904 H5 C1 H7 107.189
H6 C1 H7 108.907 H8 N3 H9 118.690
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.733      
2 C 0.466      
3 N -0.792      
4 O -0.370      
5 H 0.252      
6 H 0.211      
7 H 0.252      
8 H 0.359      
9 H 0.356      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.012 -3.790 -0.001 3.790
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.234 2.376 0.001
y 2.376 -25.609 0.001
z 0.001 0.001 -24.801
Traceless
 xyz
x 4.972 2.376 0.001
y 2.376 -3.092 0.001
z 0.001 0.001 -1.880
Polar
3z2-r2-3.760
x2-y25.376
xy2.376
xz0.001
yz0.001


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.340 0.208 0.000
y 0.208 5.464 0.000
z 0.000 0.000 3.245


<r2> (average value of r2) Å2
<r2> 74.571
(<r2>)1/2 8.635