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 H2CCNH (Ethenimine)

using model chemistry: HF/CEP-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at HF/CEP-31G*
 hartrees
Energy at 0K-22.332309
Energy at 298.15K-22.334974
HF Energy-22.332309
Nuclear repulsion energy31.668102
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/CEP-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' 3744 3362 32.63      
2 A' 3363 3020 1.73      
3 A' 2249 2019 615.12      
4 A' 1563 1404 0.11      
5 A' 1246 1119 63.24      
6 A' 1146 1029 178.01      
7 A' 810 728 132.61      
8 A' 498 447 19.99      
9 A" 3460 3107 1.38      
10 A" 1078 968 0.12      
11 A" 967 868 70.34      
12 A" 442 397 0.02      

Unscaled Zero Point Vibrational Energy (zpe) 10282.2 cm-1
Scaled (by 0.898) Zero Point Vibrational Energy (zpe) 9233.4 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/CEP-31G*
ABC
6.63780 0.31797 0.31199

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.147 -1.259 0.000
C2 0.000 0.068 0.000
N3 0.043 1.294 0.000
H4 -0.203 -1.789 0.939
H5 -0.203 -1.789 -0.939
H6 0.985 1.663 0.000

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.33452.56031.07961.07963.1329
C21.33451.22772.09002.09001.8745
N32.56031.22773.23223.23221.0108
H41.07962.09003.23221.87813.7687
H51.07962.09003.23221.87813.7687
H63.13291.87451.01083.76873.7687

picture of Ethenimine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 175.701 C2 C1 H4 119.566
C2 C1 H5 119.566 C2 N3 H6 113.377
H4 C1 H5 120.867
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.606      
2 C -0.139      
3 N -0.017      
4 H 0.209      
5 H 0.209      
6 H 0.345      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.629 -0.901 0.000 1.861
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -18.795 3.570 0.000
y 3.570 -17.871 0.000
z 0.000 0.000 -17.302
Traceless
 xyz
x -1.209 3.570 0.000
y 3.570 0.178 0.000
z 0.000 0.000 1.031
Polar
3z2-r22.061
x2-y2-0.925
xy3.570
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.414 0.755 0.000
y 0.755 7.397 0.000
z 0.000 0.000 2.473


<r2> (average value of r2) Å2
<r2> 38.044
(<r2>)1/2 6.168