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All results from a given calculation for CH3CONH2 (Acetamide)

using model chemistry: B3LYP/STO-3G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A'
Energy calculated at B3LYP/STO-3G
 hartrees
Energy at 0K-206.455816
Energy at 298.15K-206.461507
Nuclear repulsion energy117.411989
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 B3LYP/STO-3G
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 3794 3385 0.00      
2 A 3584 3199 2.76      
3 A 3495 3119 0.07      
4 A 3468 3095 0.27      
5 A 3306 2950 0.62      
6 A 1873 1672 71.58      
7 A 1762 1573 13.37      
8 A 1665 1486 4.38      
9 A 1662 1484 6.27      
10 A 1532 1367 6.15      
11 A 1344 1200 111.56      
12 A 1200 1071 4.95      
13 A 1098 980 9.24      
14 A 1034 923 4.07      
15 A 855 763 6.44      
16 A 609 544 165.57      
17 A 525 469 69.70      
18 A 514 458 11.69      
19 A 416 372 14.04      
20 A 375 334 32.64      
21 A 99 88 0.21      

Unscaled Zero Point Vibrational Energy (zpe) 17104.3 cm-1
Scaled (by 0.8924) Zero Point Vibrational Energy (zpe) 15263.9 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 B3LYP/STO-3G
ABC
0.32951 0.29165 0.16043

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/STO-3G

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.423 -0.264 -0.001
C2 -0.081 0.177 0.008
N3 -0.987 -0.960 -0.106
O4 -0.488 1.361 0.013
H5 2.065 0.628 -0.023
H6 1.660 -0.853 0.900
H7 1.633 -0.884 -0.887
H8 -1.958 -0.722 0.214
H9 -0.645 -1.818 0.391

Atom - Atom Distances (Å)
  C1 C2 N3 O4 H5 H6 H7 H8 H9
C11.56732.51062.50891.09941.10201.10143.41832.6163
C21.56731.45771.25282.19302.21102.20512.09082.1077
N32.51061.45772.37723.44122.83432.73521.04921.0487
O42.50891.25282.37722.65613.20993.21702.55753.2054
H51.09942.19303.44122.65611.79111.79414.24953.6741
H61.10202.21102.83433.20991.79111.78783.68502.5511
H71.10142.20512.73523.21701.79411.78783.75932.7745
H83.41832.09081.04922.55754.24953.68503.75931.7188
H92.61632.10771.04873.20543.67412.55112.77451.7188

picture of Acetamide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 112.139 C1 C2 O4 125.285
C2 C1 H5 109.387 C2 C1 H6 110.637
C2 C1 H7 110.216 C2 N3 H8 111.995
C2 N3 H9 113.471 N3 C2 O4 122.392
H5 C1 H6 108.897 H5 C1 H7 109.211
H6 C1 H7 108.461 H8 N3 H9 110.025
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.242      
2 C 0.210      
3 N -0.376      
4 O -0.216      
5 H 0.090      
6 H 0.079      
7 H 0.088      
8 H 0.186      
9 H 0.181      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.269 -2.117 1.193 2.445
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.095 1.209 -1.468
y 1.209 -23.479 -1.727
z -1.468 -1.727 -22.316
Traceless
 xyz
x 2.802 1.209 -1.468
y 1.209 -2.274 -1.727
z -1.468 -1.727 -0.529
Polar
3z2-r2-1.058
x2-y23.384
xy1.209
xz-1.468
yz-1.727


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.993 0.054 -0.028
y 0.054 3.471 -0.095
z -0.028 -0.095 1.323


<r2> (average value of r2) Å2
<r2> 78.053
(<r2>)1/2 8.835