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: MP2/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 MP2/CEP-31G*
 hartrees
Energy at 0K-22.718666
Energy at 298.15K-22.721072
HF Energy-22.329423
Nuclear repulsion energy31.079125
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 MP2/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' 3495 3318 17.25      
2 A' 3219 3056 4.12      
3 A' 2088 1982 267.93      
4 A' 1450 1377 2.51      
5 A' 1128 1071 33.37      
6 A' 1051 998 197.91      
7 A' 610 579 137.32      
8 A' 423 402 18.99      
9 A" 3328 3159 0.01      
10 A" 992 942 0.05      
11 A" 904 858 58.64      
12 A" 390 370 1.18      

Unscaled Zero Point Vibrational Energy (zpe) 9538.6 cm-1
Scaled (by 0.9494) Zero Point Vibrational Energy (zpe) 9055.9 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 MP2/CEP-31G*
ABC
6.44614 0.30607 0.30047

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.338 -1.246 0.000
C2 0.000 0.067 0.000
N3 -0.466 1.235 0.000
H4 0.488 -1.764 0.951
H5 0.488 -1.764 -0.951
H6 0.263 1.964 0.000

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.35582.60821.09301.09303.2112
C21.35581.25782.12012.12011.9154
N32.60821.25783.28793.28791.0314
H41.09302.12013.28791.90113.8542
H51.09302.12013.28791.90113.8542
H63.21121.91541.03143.85423.8542

picture of Ethenimine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 172.650 C2 C1 H4 119.559
C2 C1 H5 119.559 C2 N3 H6 113.219
H4 C1 H5 120.850
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability