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All results from a given calculation for CH3CONH2 (Acetamide)

using model chemistry: B1B95/STO-3G

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/STO-3G
 hartrees
Energy at 0K-206.397323
Energy at 298.15K-206.403025
Nuclear repulsion energy118.113097
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/STO-3G
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 3844 3394 0.62      
2 A 3633 3208 5.77      
3 A 3525 3113 0.22      
4 A 3498 3089 0.08      
5 A 3332 2943 0.99      
6 A 1912 1688 77.55      
7 A 1758 1553 17.62      
8 A 1662 1467 5.03      
9 A 1659 1465 6.09      
10 A 1531 1352 9.84      
11 A 1366 1206 116.29      
12 A 1201 1061 2.63      
13 A 1099 970 10.15      
14 A 1039 917 2.47      
15 A 873 771 4.28      
16 A 598 528 120.96      
17 A 526 464 73.09      
18 A 516 456 53.57      
19 A 423 374 19.01      
20 A 375 332 35.50      
21 A 99 87 0.20      

Unscaled Zero Point Vibrational Energy (zpe) 17234.1 cm-1
Scaled (by 0.883) Zero Point Vibrational Energy (zpe) 15217.7 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/STO-3G
ABC
0.33321 0.29599 0.16250

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/STO-3G

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -1.414 -0.254 -0.001
C2 0.082 0.174 0.006
N3 0.971 -0.959 -0.101
O4 0.495 1.352 0.013
H5 -2.049 0.639 -0.027
H6 -1.628 -0.875 -0.881
H7 -1.655 -0.835 0.901
H8 1.945 -0.737 0.206
H9 0.622 -1.821 0.373

Atom - Atom Distances (Å)
  C1 C2 N3 O4 H5 H6 H7 H8 H9
C11.55582.48882.49411.09671.09861.09923.39932.5963
C21.55581.44411.24782.18172.19352.19912.08352.0993
N32.48881.44412.36193.41792.71462.81371.04461.0440
O42.49411.24782.36192.64203.20353.19242.55073.1957
H51.09672.18173.41792.64201.78901.78594.23113.6539
H61.09862.19352.71463.20351.78901.78293.73672.7443
H71.09922.19912.81373.19241.78591.78293.66762.5374
H83.39932.08351.04462.55074.23113.73673.66761.7176
H92.59632.09931.04403.19573.65392.74432.53741.7176

picture of Acetamide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 112.064 C1 C2 O4 125.281
C2 C1 H5 109.455 C2 C1 H6 110.265
C2 C1 H7 110.666 C2 N3 H8 112.698
C2 N3 H9 114.111 N3 C2 O4 122.495
H5 C1 H6 109.157 H5 C1 H7 108.839
H6 C1 H7 108.425 H8 N3 H9 110.643
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.253      
2 C 0.211      
3 N -0.385      
4 O -0.220      
5 H 0.093      
6 H 0.092      
7 H 0.082      
8 H 0.193      
9 H 0.188      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.262 -2.206 1.167 2.509
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.018 -1.297 1.412
y -1.297 -23.347 -1.692
z 1.412 -1.692 -22.300
Traceless
 xyz
x 2.806 -1.297 1.412
y -1.297 -2.188 -1.692
z 1.412 -1.692 -0.618
Polar
3z2-r2-1.235
x2-y23.329
xy-1.297
xz1.412
yz-1.692


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.917 -0.046 0.023
y -0.046 3.430 -0.086
z 0.023 -0.086 1.293


<r2> (average value of r2) Å2
<r2> 77.216
(<r2>)1/2 8.787