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All results from a given calculation for CH3CONH2 (Acetamide)

using model chemistry: B1B95/CEP-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/CEP-31G
 hartrees
Energy at 0K-40.093350
Energy at 298.15K-40.099405
Nuclear repulsion energy67.226862
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/CEP-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 3801 3640 30.79      
2 A 3640 3485 38.12      
3 A 3192 3056 34.29      
4 A 3189 3054 14.74      
5 A 3089 2958 10.33      
6 A 1708 1635 370.10      
7 A 1644 1574 75.55      
8 A 1503 1439 16.11      
9 A 1477 1415 14.04      
10 A 1427 1366 95.96      
11 A 1384 1325 128.43      
12 A 1117 1069 2.09      
13 A 1076 1030 20.38      
14 A 1002 959 5.71      
15 A 863 826 0.11      
16 A 696 667 180.00      
17 A 574 550 174.09      
18 A 523 501 12.61      
19 A 510 489 26.89      
20 A 418 400 5.00      
21 A 35 33 3.36      

Unscaled Zero Point Vibrational Energy (zpe) 16433.2 cm-1
Scaled (by 0.9575) Zero Point Vibrational Energy (zpe) 15734.8 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/CEP-31G
ABC
0.34720 0.29991 0.16594

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.387 -0.327 -0.000
C2 -0.073 0.139 -0.000
N3 -1.031 -0.863 0.000
O4 -0.394 1.357 0.000
H5 1.891 0.082 0.888
H6 1.492 -1.423 -0.001
H7 1.892 0.084 -0.887
H8 -2.007 -0.588 0.000
H9 -0.793 -1.846 -0.000

Atom - Atom Distances (Å)
  C1 C2 N3 O4 H5 H6 H7 H8 H9
C11.53252.47652.45171.10031.10051.10023.40392.6576
C21.53251.38621.26002.15622.21082.15622.06622.1119
N32.47651.38622.30973.19692.58423.19771.01401.0113
O42.45171.26002.30972.76363.35952.76282.52703.2282
H51.10032.15623.19692.76361.79301.77504.05373.4228
H61.10052.21082.58423.35951.79301.79303.59702.3247
H71.10022.15623.19772.76281.77501.79304.05443.4241
H83.40392.06621.01402.52704.05373.59704.05441.7476
H92.65762.11191.01133.22823.42282.32473.42411.7476

picture of Acetamide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 116.006 C1 C2 O4 122.488
C2 C1 H5 108.858 C2 C1 H6 113.184
C2 C1 H7 108.856 C2 N3 H8 117.992
C2 N3 H9 122.725 N3 C2 O4 121.506
H5 C1 H6 109.125 H5 C1 H7 107.536
H6 C1 H7 109.128 H8 N3 H9 119.283
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/CEP-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.432      
2 C -0.143      
3 N -0.411      
4 O -0.138      
5 H 0.175      
6 H 0.128      
7 H 0.175      
8 H 0.331      
9 H 0.314      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.324 -4.438 0.000 4.450
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.795 2.907 -0.000
y 2.907 -26.493 -0.000
z -0.000 -0.000 -24.903
Traceless
 xyz
x 5.903 2.907 -0.000
y 2.907 -4.144 -0.000
z -0.000 -0.000 -1.758
Polar
3z2-r2-3.517
x2-y26.698
xy2.907
xz-0.000
yz-0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.879 0.155 0.000
y 0.155 5.496 0.000
z 0.000 0.000 2.947


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