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All results from a given calculation for CH3CONH2 (Acetamide)

using model chemistry: B1B95/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A'
Energy calculated at B1B95/6-31G*
 hartrees
Energy at 0K-209.119389
Energy at 298.15K-209.125032
Nuclear repulsion energy121.861967
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 B1B95/6-31G*
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 3774 3583 35.68      
2 A 3640 3456 36.66      
3 A 3191 3030 8.18      
4 A 3179 3018 14.33      
5 A 3096 2939 6.65      
6 A 1853 1759 329.80      
7 A 1654 1570 117.36      
8 A 1520 1443 10.94      
9 A 1502 1425 6.55      
10 A 1429 1356 84.65      
11 A 1376 1306 89.03      
12 A 1137 1080 0.51      
13 A 1067 1013 9.11      
14 A 997 946 5.69      
15 A 863 820 1.82      
16 A 680 646 18.22      
17 A 544 516 15.29      
18 A 523 497 7.82      
19 A 425 404 4.31      
20 A 174 165 244.89      
21 A 30 28 8.11      

Unscaled Zero Point Vibrational Energy (zpe) 16327.3 cm-1
Scaled (by 0.9493) Zero Point Vibrational Energy (zpe) 15499.5 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 B1B95/6-31G*
ABC
0.36258 0.31097 0.17279

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/6-31G*

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -1.357 -0.336 0.000
C2 0.077 0.147 -0.003
N3 1.022 -0.833 -0.020
O4 0.365 1.328 0.003
H5 -1.896 0.171 -0.801
H6 -1.462 -1.415 -0.126
H7 -1.824 -0.043 0.943
H8 1.989 -0.558 0.049
H9 0.794 -1.807 0.069

Atom - Atom Distances (Å)
  C1 C2 N3 O4 H5 H6 H7 H8 H9
C11.51342.43102.39481.09041.09141.09183.35342.6072
C21.51341.36151.21582.12842.19582.13162.03762.0825
N32.43101.36152.25873.18342.55343.10661.00711.0045
O42.39481.21582.25872.66443.29812.74802.48833.1649
H51.09042.12843.18342.66441.77761.75834.04263.4506
H61.09142.19582.55343.29811.77761.77653.55952.2978
H71.09182.13163.10662.74801.75831.77653.94913.2754
H83.35342.03761.00712.48834.04263.55953.94911.7289
H92.60722.08251.00453.16493.45062.29783.27541.7289

picture of Acetamide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 115.373 C1 C2 O4 122.304
C2 C1 H5 108.559 C2 C1 H6 113.935
C2 C1 H7 108.737 C2 N3 H8 117.919
C2 N3 H9 122.615 N3 C2 O4 122.322
H5 C1 H6 109.119 H5 C1 H7 107.366
H6 C1 H7 108.925 H8 N3 H9 118.507
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.581      
2 C 0.579      
3 N -0.773      
4 O -0.499      
5 H 0.207      
6 H 0.158      
7 H 0.204      
8 H 0.357      
9 H 0.348      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.075 -3.727 0.280 3.738
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.907 -2.350 0.354
y -2.350 -25.296 -0.412
z 0.354 -0.412 -24.420
Traceless
 xyz
x 4.951 -2.350 0.354
y -2.350 -3.133 -0.412
z 0.354 -0.412 -1.818
Polar
3z2-r2-3.635
x2-y25.389
xy-2.350
xz0.354
yz-0.412


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.954 -0.204 -0.000
y -0.204 5.263 -0.000
z -0.000 -0.000 2.904


<r2> (average value of r2) Å2
<r2> 74.545
(<r2>)1/2 8.634