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All results from a given calculation for CH3CONH2 (Acetamide)

using model chemistry: B3PW91/cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A'
Energy calculated at B3PW91/cc-pVDZ
 hartrees
Energy at 0K-209.150848
Energy at 298.15K-209.156618
Nuclear repulsion energy121.424582
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 B3PW91/cc-pVDZ
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 3726 3595 34.42      
2 A 3583 3458 27.85      
3 A 3186 3074 4.18      
4 A 3133 3023 9.87      
5 A 3053 2946 6.32      
6 A 1822 1758 311.96      
7 A 1595 1539 109.45      
8 A 1455 1404 9.60      
9 A 1440 1390 11.21      
10 A 1392 1343 122.01      
11 A 1327 1280 37.59      
12 A 1120 1081 0.43      
13 A 1036 1000 5.17      
14 A 967 933 5.43      
15 A 854 824 2.47      
16 A 646 623 10.72      
17 A 555 536 16.90      
18 A 513 495 7.54      
19 A 415 401 3.88      
20 A 251 243 198.02      
21 A 49 48 0.17      

Unscaled Zero Point Vibrational Energy (zpe) 16058.2 cm-1
Scaled (by 0.965) Zero Point Vibrational Energy (zpe) 15496.2 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 B3PW91/cc-pVDZ
ABC
0.35914 0.30976 0.17189

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/cc-pVDZ

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -1.370 -0.296 -0.001
C2 0.079 0.152 -0.006
N3 0.994 -0.867 -0.041
O4 0.413 1.323 0.007
H5 -2.006 0.563 -0.247
H6 -1.551 -1.110 -0.719
H7 -1.647 -0.661 1.002
H8 1.965 -0.617 0.104
H9 0.722 -1.824 0.137

Atom - Atom Distances (Å)
  C1 C2 N3 O4 H5 H6 H7 H8 H9
C11.51682.43292.40901.09621.10081.10243.35292.5949
C21.51681.36991.21812.13832.18132.15722.04032.0828
N32.43291.36992.26583.32962.64542.84691.01321.0108
O42.40901.21812.26582.54853.21043.02832.48633.1646
H51.09622.13833.32962.54851.79681.78504.15763.6451
H61.10082.18132.64543.21041.79681.78163.64522.5321
H71.10242.15722.84693.02831.78501.78163.72232.7774
H83.35292.04031.01322.48634.15763.64523.72231.7328
H92.59492.08281.01083.16463.64512.53212.77741.7328

picture of Acetamide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 114.780 C1 C2 O4 123.115
C2 C1 H5 108.771 C2 C1 H6 111.899
C2 C1 H7 109.891 C2 N3 H8 116.987
C2 N3 H9 121.318 N3 C2 O4 122.101
H5 C1 H6 109.733 H5 C1 H7 108.560
H6 C1 H7 107.930 H8 N3 H9 117.764
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.083      
2 C 0.066      
3 N -0.127      
4 O -0.270      
5 H 0.070      
6 H 0.056      
7 H 0.070      
8 H 0.114      
9 H 0.104      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.180 -3.658 0.494 3.696
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.534 -2.287 0.592
y -2.287 -25.106 -0.729
z 0.592 -0.729 -24.393
Traceless
 xyz
x 4.215 -2.287 0.592
y -2.287 -2.643 -0.729
z 0.592 -0.729 -1.573
Polar
3z2-r2-3.145
x2-y24.572
xy-2.287
xz0.592
yz-0.729


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> 74.939
(<r2>)1/2 8.657