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All results from a given calculation for CH3CONH2 (Acetamide)

using model chemistry: B1B95/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A'
Energy calculated at B1B95/6-31G(2df,p)
 hartrees
Energy at 0K-209.142949
Energy at 298.15K-209.148463
Nuclear repulsion energy122.039500
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 B1B95/6-31G(2df,p)
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 3782 3622 36.96      
2 A 3638 3484 35.63      
3 A 3186 3052 6.20      
4 A 3146 3013 11.84      
5 A 3068 2938 5.51      
6 A 1834 1756 307.00      
7 A 1613 1545 111.84      
8 A 1482 1419 9.58      
9 A 1464 1403 7.62      
10 A 1397 1337 103.18      
11 A 1342 1285 56.93      
12 A 1115 1068 0.85      
13 A 1045 1001 5.60      
14 A 975 933 5.44      
15 A 851 815 1.85      
16 A 665 637 8.41      
17 A 542 519 13.24      
18 A 518 496 5.39      
19 A 413 395 3.81      
20 A 102 98 184.27      
21 A 36 35 5.36      

Unscaled Zero Point Vibrational Energy (zpe) 16107.5 cm-1
Scaled (by 0.9577) Zero Point Vibrational Energy (zpe) 15426.2 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 B1B95/6-31G(2df,p)
ABC
0.36287 0.31230 0.17326

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/6-31G(2df,p)

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -1.362 -0.311 -0.001
C2 0.079 0.151 -0.010
N3 1.001 -0.850 -0.007
O4 0.394 1.321 0.001
H5 -1.970 0.437 -0.506
H6 -1.502 -1.283 -0.478
H7 -1.706 -0.385 1.034
H8 1.973 -0.601 0.042
H9 0.747 -1.819 0.009

Atom - Atom Distances (Å)
  C1 C2 N3 O4 H5 H6 H7 H8 H9
C11.51402.42382.39741.08811.09131.09293.34762.5925
C21.51401.36091.21122.12802.18572.13672.03782.0803
N32.42381.36092.25453.27612.58352.93721.00431.0017
O42.39741.21122.25452.57443.25642.89602.48763.1597
H51.08812.12803.27612.57441.78231.76504.11373.5686
H61.09132.18572.58353.25641.78231.76983.57892.3626
H71.09292.13672.93722.89601.76501.76983.81633.0206
H83.34762.03781.00432.48764.11373.57893.81631.7284
H92.59252.08031.00173.15973.56862.36263.02061.7284

picture of Acetamide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 114.829 C1 C2 O4 122.822
C2 C1 H5 108.626 C2 C1 H6 113.052
C2 C1 H7 109.028 C2 N3 H8 118.204
C2 N3 H9 122.681 N3 C2 O4 122.338
H5 C1 H6 109.730 H5 C1 H7 108.044
H6 C1 H7 108.242 H8 N3 H9 118.997
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.503      
2 C 0.426      
3 N -0.547      
4 O -0.369      
5 H 0.164      
6 H 0.128      
7 H 0.160      
8 H 0.273      
9 H 0.269      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.117 -3.650 0.139 3.654
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.117 -2.336 0.109
y -2.336 -24.989 -0.159
z 0.109 -0.159 -24.263
Traceless
 xyz
x 4.509 -2.336 0.109
y -2.336 -2.800 -0.159
z 0.109 -0.159 -1.710
Polar
3z2-r2-3.420
x2-y24.873
xy-2.336
xz0.109
yz-0.159


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.303 -0.151 0.000
y -0.151 5.460 0.002
z 0.000 0.002 3.322


<r2> (average value of r2) Å2
<r2> 74.312
(<r2>)1/2 8.620