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All results from a given calculation for CH3CONH2 (Acetamide)

using model chemistry: PBEPBE/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A'
Energy calculated at PBEPBE/6-31G(2df,p)
 hartrees
Energy at 0K-208.981169
Energy at 298.15K-208.986789
Nuclear repulsion energy120.865490
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 PBEPBE/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 3655 3618 23.76      
2 A 3516 3480 19.05      
3 A 3102 3070 6.14      
4 A 3061 3030 11.62      
5 A 2987 2956 6.27      
6 A 1760 1742 254.74      
7 A 1563 1547 86.03      
8 A 1437 1422 7.28      
9 A 1421 1407 7.34      
10 A 1342 1328 86.13      
11 A 1296 1283 63.63      
12 A 1086 1075 0.15      
13 A 1008 998 4.32      
14 A 940 930 4.50      
15 A 821 813 3.50      
16 A 644 638 7.93      
17 A 530 525 13.94      
18 A 498 493 5.52      
19 A 405 400 3.91      
20 A 211 209 179.59      
21 A 42 42 2.17      

Unscaled Zero Point Vibrational Energy (zpe) 15662.3 cm-1
Scaled (by 0.9897) Zero Point Vibrational Energy (zpe) 15500.9 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 PBEPBE/6-31G(2df,p)
ABC
0.35527 0.30690 0.17005

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -1.376 -0.302 -0.001
C2 0.081 0.153 -0.008
N3 1.000 -0.871 -0.033
O4 0.414 1.331 0.005
H5 -1.985 0.463 -0.502
H6 -1.529 -1.276 -0.491
H7 -1.728 -0.383 1.041
H8 1.976 -0.625 0.095
H9 0.729 -1.837 0.100

Atom - Atom Distances (Å)
  C1 C2 N3 O4 H5 H6 H7 H8 H9
C11.52632.44332.42291.09791.10121.10283.36892.6078
C21.52631.37561.22442.14602.20562.15862.05082.0958
N32.44331.37562.27843.30212.60142.97161.01461.0126
O42.42291.22442.27842.60073.28862.93222.50433.1853
H51.09792.14603.30212.60071.79721.77824.15003.6078
H61.10122.20562.60143.28861.79721.78493.61232.4006
H71.10282.15862.97162.93221.77821.78493.83033.0062
H83.36892.05081.01462.50434.15003.61233.83031.7392
H92.60782.09581.01263.18533.60782.40063.00621.7392

picture of Acetamide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 114.597 C1 C2 O4 123.106
C2 C1 H5 108.629 C2 C1 H6 113.167
C2 C1 H7 109.321 C2 N3 H8 117.393
C2 N3 H9 121.962 N3 C2 O4 122.297
H5 C1 H6 109.622 H5 C1 H7 107.808
H6 C1 H7 108.160 H8 N3 H9 118.172
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.512      
2 C 0.377      
3 N -0.504      
4 O -0.325      
5 H 0.163      
6 H 0.129      
7 H 0.158      
8 H 0.259      
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
  -0.117 -3.503 0.403 3.528
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.432 -2.319 0.459
y -2.319 -24.995 -0.589
z 0.459 -0.589 -24.392
Traceless
 xyz
x 4.262 -2.319 0.459
y -2.319 -2.583 -0.589
z 0.459 -0.589 -1.679
Polar
3z2-r2-3.358
x2-y24.564
xy-2.319
xz0.459
yz-0.589


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.627 -0.179 0.009
y -0.179 5.707 -0.011
z 0.009 -0.011 3.401


<r2> (average value of r2) Å2
<r2> 0.000
(<r2>)1/2 0.000