return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for CH3CONH2 (Acetamide)

using model chemistry: HF/SDD

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/SDD
 hartrees
Energy at 0K-207.922949
Energy at 298.15K-207.929135
Nuclear repulsion energy121.556028
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/SDD
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 4003 3604 55.58      
2 A 3849 3466 57.55      
3 A 3357 3023 13.80      
4 A 3296 2968 28.06      
5 A 3219 2898 15.09      
6 A 1849 1665 478.12      
7 A 1805 1625 79.57      
8 A 1640 1476 17.45      
9 A 1625 1463 22.23      
10 A 1568 1412 60.83      
11 A 1486 1338 210.15      
12 A 1237 1114 5.23      
13 A 1193 1074 16.73      
14 A 1098 989 15.40      
15 A 916 824 0.69      
16 A 718 646 217.98      
17 A 600 540 161.19      
18 A 584 526 23.60      
19 A 531 478 79.71      
20 A 446 402 4.07      
21 A 10 9 0.23      

Unscaled Zero Point Vibrational Energy (zpe) 17514.6 cm-1
Scaled (by 0.9004) Zero Point Vibrational Energy (zpe) 15770.1 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/SDD
ABC
0.35970 0.30922 0.17154

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/SDD

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -1.370 -0.314 -0.000
C2 0.072 0.144 -0.002
N3 1.012 -0.850 0.000
O4 0.392 1.332 -0.000
H5 -2.014 0.549 -0.055
H6 -1.566 -0.962 -0.846
H7 -1.589 -0.863 0.908
H8 1.974 -0.598 0.005
H9 0.767 -1.811 -0.003

Atom - Atom Distances (Å)
  C1 C2 N3 O4 H5 H6 H7 H8 H9
C11.51282.44172.41111.07761.08351.08383.35602.6094
C21.51281.36801.23092.12572.14902.14462.04142.0749
N32.44171.36802.26873.33422.71562.75470.99460.9921
O42.41111.23092.26872.53113.13253.09322.49543.1659
H51.07762.12573.33422.53111.76281.76114.14993.6476
H61.08352.14902.71563.13251.76281.75683.65902.6216
H71.08382.14462.75473.09321.76111.75683.68502.6979
H83.35602.04140.99462.49544.14993.65903.68501.7120
H92.60942.07490.99213.16593.64762.62162.69791.7120

picture of Acetamide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 115.810 C1 C2 O4 122.668
C2 C1 H5 109.136 C2 C1 H6 110.642
C2 C1 H7 110.276 C2 N3 H8 118.698
C2 N3 H9 122.279 N3 C2 O4 121.521
H5 C1 H6 109.315 H5 C1 H7 109.139
H6 C1 H7 108.307 H8 N3 H9 119.023
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/SDD Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.654      
2 C 0.502      
3 N -0.809      
4 O -0.443      
5 H 0.240      
6 H 0.202      
7 H 0.207      
8 H 0.388      
9 H 0.366      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.659 -4.682 0.009 4.728
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.540 -2.592 0.004
y -2.592 -27.567 -0.001
z 0.004 -0.001 -25.399
Traceless
 xyz
x 5.943 -2.592 0.004
y -2.592 -4.598 -0.001
z 0.004 -0.001 -1.345
Polar
3z2-r2-2.691
x2-y27.027
xy-2.592
xz0.004
yz-0.001


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.163 0.026 -0.002
y 0.026 5.172 -0.001
z -0.002 -0.001 2.842


<r2> (average value of r2) Å2
<r2> 75.637
(<r2>)1/2 8.697