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All results from a given calculation for CH3CONH2 (Acetamide)

using model chemistry: G4

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A'
Energy calculated at G4
 hartrees
Energy at 0K-209.104245
Energy at 298.15K-209.110235
HF Energy-209.232491
Nuclear repulsion energy121.536511
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/6-31G(2df,p)
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 3735 3604 30.20      
2 A 3600 3474 28.60      
3 A 3161 3051 6.52      
4 A 3107 2998 12.67      
5 A 3043 2937 6.56      
6 A 1811 1748 289.84      
7 A 1620 1563 90.46      
8 A 1486 1434 6.69      
9 A 1473 1421 8.54      
10 A 1395 1346 69.16      
11 A 1336 1290 97.86      
12 A 1125 1086 0.49      
13 A 1054 1017 4.25      
14 A 976 942 8.27      
15 A 837 808 2.51      
16 A 648 626 9.48      
17 A 551 532 15.42      
18 A 518 499 4.33      
19 A 414 400 3.80      
20 A 205 198 193.94      
21 A 51 49 0.19      

Unscaled Zero Point Vibrational Energy (zpe) 16072.3 cm-1
Scaled (by 0.965) Zero Point Vibrational Energy (zpe) 15509.8 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/6-31G(2df,p)
ABC
0.35992 0.30930 0.17178

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-31G(2df,p)

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -1.375 -0.291 -0.000
C2 0.081 0.155 -0.006
N3 0.990 -0.870 -0.030
O4 0.420 1.320 0.005
H5 -2.004 0.562 -0.251
H6 -1.554 -1.104 -0.711
H7 -1.652 -0.649 0.997
H8 1.963 -0.636 0.083
H9 0.713 -1.828 0.093

Atom - Atom Distances (Å)
  C1 C2 N3 O4 H5 H6 H7 H8 H9
C11.52272.43472.41241.08971.09421.09573.35682.5942
C21.52271.36981.21392.13862.18072.15772.04352.0833
N32.43471.36982.26313.32612.64402.84291.00721.0049
O42.41241.21392.26312.55283.20743.02632.49283.1629
H51.08972.13863.32612.55281.78611.77544.15763.6352
H61.09422.18072.64403.20741.78611.77033.63592.5121
H71.09572.15772.84293.02631.77541.77033.72862.7926
H83.35682.04351.00722.49284.15763.63593.72861.7269
H92.59422.08331.00493.16293.63522.51212.79261.7269

picture of Acetamide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 114.342 C1 C2 O4 123.155
C2 C1 H5 108.662 C2 C1 H6 112.012
C2 C1 H7 109.940 C2 N3 H8 117.694
C2 N3 H9 122.095 N3 C2 O4 122.500
H5 C1 H6 109.702 H5 C1 H7 108.657
H6 C1 H7 107.813 H8 N3 H9 118.106
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.480      
2 C 0.395      
3 N -0.504      
4 O -0.347      
5 H 0.152      
6 H 0.129      
7 H 0.141      
8 H 0.260      
9 H 0.255      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.214 -3.610 0.363 3.634
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


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> 74.941
(<r2>)1/2 8.657