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: HSEh1PBE/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 HSEh1PBE/6-31G*
 hartrees
Energy at 0K-208.991412
Energy at 298.15K 
Nuclear repulsion energy121.711378
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 HSEh1PBE/6-31G*
Rotational Constants (cm-1) from geometry optimized at HSEh1PBE/6-31G*
See section I.F.4 to change rotational constant units
Geometric Data calculated at HSEh1PBE/6-31G*

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -1.358 -0.337 -0.000
C2 0.078 0.146 -0.003
N3 1.024 -0.833 -0.012
O4 0.365 1.329 0.002
H5 -1.891 0.152 -0.820
H6 -1.465 -1.421 -0.101
H7 -1.834 -0.019 0.933
H8 1.993 -0.557 0.031
H9 0.797 -1.812 0.041

Atom - Atom Distances (Å)
  C1 C2 N3 O4 H5 H6 H7 H8 H9
C11.51512.43332.39731.09301.09391.09403.35852.6124
C21.51511.36191.21762.13172.20112.13462.04052.0868
N32.43331.36192.26093.18132.55853.11801.00841.0058
O42.39731.21762.26092.67473.30512.74242.49203.1712
H51.09302.13173.18132.67471.78111.76154.03883.4388
H61.09392.20112.55853.30511.78111.78013.56622.3001
H71.09402.13463.11802.74241.76151.78013.96833.3067
H83.35852.04051.00842.49204.03883.56623.96831.7329
H92.61242.08681.00583.17123.43882.30013.30671.7329

picture of Acetamide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 115.408 C1 C2 O4 122.253
C2 C1 H5 108.560 C2 C1 H6 114.085
C2 C1 H7 108.725 C2 N3 H8 118.057
C2 N3 H9 122.897 N3 C2 O4 122.339
H5 C1 H6 109.061 H5 C1 H7 107.301
H6 C1 H7 108.895 H8 N3 H9 118.708
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HSEh1PBE/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.610      
2 C 0.589      
3 N -0.786      
4 O -0.500      
5 H 0.214      
6 H 0.165      
7 H 0.212      
8 H 0.362      
9 H 0.354      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.060 -3.751 0.173 3.755
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.922 -2.382 0.209
y -2.382 -25.327 -0.251
z 0.209 -0.251 -24.505
Traceless
 xyz
x 4.994 -2.382 0.209
y -2.382 -3.114 -0.251
z 0.209 -0.251 -1.880
Polar
3z2-r2-3.761
x2-y25.405
xy-2.382
xz0.209
yz-0.251


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


<r2> (average value of r2) Å2
<r2> 74.727
(<r2>)1/2 8.645