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All results from a given calculation for CH3CONH2 (Acetamide)

using model chemistry: B3LYP/CEP-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 B3LYP/CEP-31G*
 hartrees
Energy at 0K-40.205123
Energy at 298.15K-40.210778
Nuclear repulsion energy67.450407
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/CEP-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A 3716 3589 27.24      
2 A 3581 3458 28.87      
3 A 3146 3038 19.70      
4 A 3136 3029 27.31      
5 A 3063 2958 12.18      
6 A 1776 1715 375.27      
7 A 1622 1567 91.93      
8 A 1491 1440 9.21      
9 A 1472 1422 8.20      
10 A 1402 1354 65.76      
11 A 1329 1284 129.96      
12 A 1107 1069 0.29      
13 A 1049 1013 8.12      
14 A 973 940 8.02      
15 A 836 807 1.05      
16 A 648 626 13.54      
17 A 527 509 14.22      
18 A 511 493 15.16      
19 A 417 402 4.05      
20 A 200 193 254.08      
21 A 54 52 1.57      

Unscaled Zero Point Vibrational Energy (zpe) 16028.7 cm-1
Scaled (by 0.9657) Zero Point Vibrational Energy (zpe) 15478.9 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/CEP-31G*
ABC
0.35192 0.29988 0.16716

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/CEP-31G*

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.366 -0.353 -0.001
C2 -0.080 0.176 -0.003
N3 -1.073 -0.794 0.045
O4 -0.345 1.383 -0.007
H5 1.852 -0.031 0.935
H6 1.434 -1.451 -0.080
H7 1.909 0.112 -0.839
H8 -2.035 -0.476 -0.053
H9 -0.871 -1.775 -0.124

Atom - Atom Distances (Å)
  C1 C2 N3 O4 H5 H6 H7 H8 H9
C11.54042.47862.43731.10291.10311.10193.40392.6535
C21.54041.38831.23502.15792.22462.15942.06142.1087
N32.47861.38832.29533.15082.59453.23951.01831.0159
O42.43731.23502.29532.77693.34682.71812.51303.2032
H51.10292.15793.15082.77691.79571.78084.03543.4028
H61.10312.22462.59453.34681.79571.80173.60372.3281
H71.10192.15943.23952.71811.78081.80174.06503.4356
H83.40392.06141.01832.51304.03543.60374.06501.7454
H92.65352.10871.01593.20323.40282.32813.43561.7454

picture of Acetamide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 115.526 C1 C2 O4 122.467
C2 C1 H5 108.308 C2 C1 H6 113.573
C2 C1 H7 108.476 C2 N3 H8 117.038
C2 N3 H9 121.821 N3 C2 O4 121.974
H5 C1 H6 108.976 H5 C1 H7 107.746
H6 C1 H7 109.597 H8 N3 H9 118.199
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/CEP-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.462      
2 C -0.147      
3 N -0.387      
4 O -0.137      
5 H 0.177      
6 H 0.137      
7 H 0.178      
8 H 0.329      
9 H 0.312      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.099 -3.915 -0.414 3.939
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.885 2.353 0.636
y 2.353 -26.103 0.674
z 0.636 0.674 -24.781
Traceless
 xyz
x 5.557 2.353 0.636
y 2.353 -3.771 0.674
z 0.636 0.674 -1.786
Polar
3z2-r2-3.572
x2-y26.218
xy2.353
xz0.636
yz0.674


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.271 0.129 -0.004
y 0.129 5.484 -0.020
z -0.004 -0.020 3.220


<r2> (average value of r2) Å2
<r2> 65.076
(<r2>)1/2 8.067