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-121G

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-121G
 hartrees
Energy at 0K-22.564492
Energy at 298.15K-22.566979
HF Energy-22.274424
Nuclear repulsion energy30.983354
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-121G
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' 3409 3327 7.57      
2 A' 3127 3052 4.37      
3 A' 1989 1941 248.40      
4 A' 1461 1426 8.78      
5 A' 1079 1053 1.12      
6 A' 955 932 375.40      
7 A' 722 705 144.95      
8 A' 427 417 22.15      
9 A" 3241 3164 1.39      
10 A" 1042 1017 0.01      
11 A" 920 898 77.78      
12 A" 392 382 3.12      

Unscaled Zero Point Vibrational Energy (zpe) 9381.9 cm-1
Scaled (by 0.976) Zero Point Vibrational Energy (zpe) 9156.7 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-121G
ABC
6.80030 0.30360 0.29773

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-121G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.672 -1.107 0.000
C2 0.000 0.065 0.000
N3 -0.789 1.055 0.000
H4 0.954 -1.578 0.941
H5 0.954 -1.578 -0.941
H6 -0.417 2.018 0.000

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.35102.60951.08961.08963.3090
C21.35101.26602.12002.12001.9967
N32.60951.26603.29483.29481.0317
H41.08962.12003.29481.88293.9613
H51.08962.12003.29481.88293.9613
H63.30901.99671.03173.96133.9613

picture of Ethenimine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 171.284 C2 C1 H4 120.225
C2 C1 H5 120.225 C2 N3 H6 120.336
H4 C1 H5 119.538
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability