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All results from a given calculation for CH3CONH2 (Acetamide)

using model chemistry: B1B95/aug-cc-pVTZ

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/aug-cc-pVTZ
 hartrees
Energy at 0K-209.208039
Energy at 298.15K-209.213736
HF Energy-209.208039
Nuclear repulsion energy122.359258
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/aug-cc-pVTZ
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 3771 3614 41.08      
2 A 3629 3478 37.17      
3 A 3161 3030 9.72      
4 A 3157 3026 8.72      
5 A 3076 2948 6.93      
6 A 1798 1723 392.92      
7 A 1624 1556 111.65      
8 A 1491 1429 11.93      
9 A 1470 1409 7.44      
10 A 1399 1341 94.90      
11 A 1353 1297 85.83      
12 A 1120 1074 0.31      
13 A 1052 1009 3.67      
14 A 986 945 8.79      
15 A 858 822 2.00      
16 A 673 645 9.01      
17 A 543 520 14.08      
18 A 527 505 5.27      
19 A 425 407 4.48      
20 A 215 206 184.98      
21 A 16 15 2.81      

Unscaled Zero Point Vibrational Energy (zpe) 16171.1 cm-1
Scaled (by 0.9585) Zero Point Vibrational Energy (zpe) 15500.0 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/aug-cc-pVTZ
ABC
0.36641 0.31287 0.17416

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/aug-cc-pVTZ

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -1.363 -0.296 -0.000
C2 0.079 0.154 0.002
N3 0.989 -0.859 -0.029
O4 0.408 1.316 0.004
H5 -2.000 0.577 -0.060
H6 -1.562 -0.951 -0.846
H7 -1.591 -0.847 0.911
H8 1.959 -0.622 0.064
H9 0.718 -1.814 0.097

Atom - Atom Distances (Å)
  C1 C2 N3 O4 H5 H6 H7 H8 H9
C11.50982.41792.39431.08271.08851.08873.33792.5774
C21.50981.36171.20792.12192.15222.14802.03472.0710
N32.41791.36172.25113.31562.68012.74501.00291.0006
O42.39431.20792.25112.51883.12143.08132.48273.1464
H51.08272.12193.31562.51881.77381.77184.13783.6234
H61.08852.15222.68013.12141.77381.76003.65152.6143
H71.08872.14802.74503.08131.77181.76003.65572.6316
H83.33792.03471.00292.48274.13783.65153.65571.7207
H92.57742.07101.00063.14643.62342.61432.63161.7207

picture of Acetamide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 114.613 C1 C2 O4 123.140
C2 C1 H5 108.743 C2 C1 H6 110.811
C2 C1 H7 110.458 C2 N3 H8 117.943
C2 N3 H9 121.744 N3 C2 O4 122.231
H5 C1 H6 109.568 H5 C1 H7 109.365
H6 C1 H7 107.877 H8 N3 H9 118.374
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.783      
2 C 0.581      
3 N -0.251      
4 O -0.675      
5 H 0.293      
6 H 0.315      
7 H 0.290      
8 H 0.133      
9 H 0.094      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.158 -3.873 0.011 3.877
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.418 -2.298 0.013
y -2.298 -26.371 -0.009
z 0.013 -0.009 -24.998
Traceless
 xyz
x 5.267 -2.298 0.013
y -2.298 -3.663 -0.009
z 0.013 -0.009 -1.604
Polar
3z2-r2-3.208
x2-y25.953
xy-2.298
xz0.013
yz-0.009


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.410 -0.195 -0.004
y -0.195 6.510 -0.001
z -0.004 -0.001 4.437


<r2> (average value of r2) Å2
<r2> 74.512
(<r2>)1/2 8.632