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All results from a given calculation for CH3CONH2 (Acetamide)

using model chemistry: HF/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 HF/6-31G**
 hartrees
Energy at 0K-207.988974
Energy at 298.15K-207.994680
Nuclear repulsion energy122.777064
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 HF/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 3993 3604 57.43      
2 A 3851 3476 53.22      
3 A 3322 2998 10.14      
4 A 3258 2940 20.51      
5 A 3195 2884 9.28      
6 A 1984 1791 444.66      
7 A 1779 1606 136.07      
8 A 1612 1455 7.59      
9 A 1600 1444 8.53      
10 A 1550 1399 85.54      
11 A 1455 1314 132.39      
12 A 1229 1109 1.23      
13 A 1161 1048 8.26      
14 A 1071 966 13.44      
15 A 911 823 0.32      
16 A 694 626 22.67      
17 A 599 541 22.09      
18 A 559 505 4.57      
19 A 448 404 3.76      
20 A 127 115 283.15      
21 A 19 17 2.94      

Unscaled Zero Point Vibrational Energy (zpe) 17207.3 cm-1
Scaled (by 0.9026) Zero Point Vibrational Energy (zpe) 15531.3 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 HF/6-31G**
ABC
0.36900 0.31371 0.17504

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -1.362 -0.308 -0.000
C2 0.079 0.153 -0.004
N3 1.001 -0.842 -0.010
O4 0.390 1.310 0.002
H5 -2.004 0.553 -0.110
H6 -1.548 -1.008 -0.808
H7 -1.590 -0.807 0.937
H8 1.961 -0.593 0.031
H9 0.750 -1.800 0.032

Atom - Atom Distances (Å)
  C1 C2 N3 O4 H5 H6 H7 H8 H9
C11.51302.42192.38441.07971.08521.08593.33512.5858
C21.51301.35601.19772.12432.15502.14302.02432.0651
N32.42191.35602.23683.31422.67552.75830.99320.9909
O42.38441.19772.23682.51343.12813.04532.46763.1305
H51.07972.12433.31422.51341.77001.76524.12983.6251
H61.08522.15502.67553.12811.77001.75683.63172.5717
H71.08592.14302.75833.04531.76521.75683.67082.6979
H83.33512.02430.99322.46764.12983.63173.67081.7097
H92.58582.06510.99093.13053.62512.57172.69791.7097

picture of Acetamide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 115.051 C1 C2 O4 122.763
C2 C1 H5 108.886 C2 C1 H6 111.008
C2 C1 H7 109.997 C2 N3 H8 118.200
C2 N3 H9 122.510 N3 C2 O4 122.186
H5 C1 H6 109.694 H5 C1 H7 109.201
H6 C1 H7 108.032 H8 N3 H9 119.024
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.434 -0.434    
2 C 0.707 0.986    
3 N -0.751 -1.116    
4 O -0.592 -0.667    
5 H 0.168 0.113    
6 H 0.135 0.117    
7 H 0.141 0.113    
8 H 0.320 0.453    
9 H 0.307 0.434    


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.387 -4.036 0.160 4.058
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.468 -2.294 0.206
y -2.294 -25.957 -0.232
z 0.206 -0.232 -24.736
Traceless
 xyz
x 4.879 -2.294 0.206
y -2.294 -3.355 -0.232
z 0.206 -0.232 -1.524
Polar
3z2-r2-3.047
x2-y25.489
xy-2.294
xz0.206
yz-0.232


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.417 -0.020 0.001
y -0.020 4.986 -0.003
z 0.001 -0.003 2.905


<r2> (average value of r2) Å2
<r2> 74.058
(<r2>)1/2 8.606