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All results from a given calculation for CH3CONH2 (Acetamide)

using model chemistry: B2PLYP/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 B2PLYP/6-31G*
 hartrees
Energy at 0K-208.990661
Energy at 298.15K-208.996444
HF Energy-208.793083
Nuclear repulsion energy121.292412
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 B2PLYP/6-31G*
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 3743 3553 31.93      
2 A 3614 3430 33.62      
3 A 3206 3043 6.95      
4 A 3163 3002 14.84      
5 A 3093 2936 6.27      
6 A 1813 1721 285.87      
7 A 1663 1578 92.32      
8 A 1537 1459 7.79      
9 A 1524 1447 8.25      
10 A 1446 1372 60.77      
11 A 1373 1304 112.54      
12 A 1149 1091 0.33      
13 A 1081 1026 6.48      
14 A 1003 952 8.04      
15 A 860 816 2.18      
16 A 659 626 20.37      
17 A 554 526 18.74      
18 A 514 488 9.05      
19 A 424 403 4.37      
20 A 255 242 255.37      
21 A 46 44 2.93      

Unscaled Zero Point Vibrational Energy (zpe) 16359.7 cm-1
Scaled (by 0.9492) Zero Point Vibrational Energy (zpe) 15528.6 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 B2PLYP/6-31G*
ABC
0.35777 0.30889 0.17123

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/6-31G*

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -1.375 -0.291 0.000
C2 0.082 0.156 0.001
N3 0.987 -0.877 -0.031
O4 0.422 1.328 0.004
H5 -2.007 0.593 -0.059
H6 -1.586 -0.946 -0.850
H7 -1.613 -0.843 0.915
H8 1.964 -0.645 0.068
H9 0.712 -1.837 0.107

Atom - Atom Distances (Å)
  C1 C2 N3 O4 H5 H6 H7 H8 H9
C11.52342.43382.41881.08841.09441.09463.35872.5992
C21.52341.37371.22082.13482.17262.16902.04692.0924
N32.43381.37372.27633.33562.70112.76721.00951.0080
O42.41881.22082.27632.53893.15233.11202.50463.1796
H51.08842.13483.33562.53891.78151.77934.16183.6502
H61.09442.17262.70113.15231.78151.76833.67972.6435
H71.09462.16902.76723.11201.77931.76833.68162.6545
H83.35872.04691.00952.50464.16183.67973.68161.7296
H92.59922.09241.00803.17963.65022.64352.65451.7296

picture of Acetamide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 114.194 C1 C2 O4 123.253
C2 C1 H5 108.495 C2 C1 H6 111.125
C2 C1 H7 110.821 C2 N3 H8 117.570
C2 N3 H9 122.180 N3 C2 O4 122.539
H5 C1 H6 109.408 H5 C1 H7 109.194
H6 C1 H7 107.772 H8 N3 H9 118.026
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.557      
2 C 0.572      
3 N -0.765      
4 O -0.486      
5 H 0.196      
6 H 0.160      
7 H 0.185      
8 H 0.352      
9 H 0.344      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.201 -3.675 0.562 3.723
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.571 -2.253 0.683
y -2.253 -25.492 -0.819
z 0.683 -0.819 -24.656
Traceless
 xyz
x 4.503 -2.253 0.683
y -2.253 -2.878 -0.819
z 0.683 -0.819 -1.625
Polar
3z2-r2-3.249
x2-y24.920
xy-2.253
xz0.683
yz-0.819


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.884 -0.143 -0.001
y -0.143 5.359 -0.005
z -0.001 -0.005 2.923


<r2> (average value of r2) Å2
<r2> 75.252
(<r2>)1/2 8.675