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 HCNH (methyleneazane)

using model chemistry: MP3=FULL/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 no CS cis 2A'
1 2 yes CS trans 2A'

Conformer 1 (CS cis)

Jump to S1C2
Energy calculated at MP3=FULL/6-31G*
 hartrees
Energy at 0K-93.672106
Energy at 298.15K-93.673408
HF Energy-93.391328
Nuclear repulsion energy28.460417
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 MP3=FULL/6-31G*
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' 3425 3214 3.85      
2 A' 3069 2879 164.73      
3 A' 2325 2181 287.22      
4 A' 1081 1014 118.97      
5 A' 828 777 214.12      
6 A" 974 914 8.04      

Unscaled Zero Point Vibrational Energy (zpe) 5850.5 cm-1
Scaled (by 0.9383) Zero Point Vibrational Energy (zpe) 5489.6 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 MP3=FULL/6-31G*
ABC
13.27309 1.32581 1.20540

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3=FULL/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.110 0.622 0.000
N2 0.110 -0.577 0.000
H3 -0.663 1.406 0.000
H4 -0.772 -1.095 0.000

Atom - Atom Distances (Å)
  C1 N2 H3 H4
C11.19901.10161.9309
N21.19902.12861.0238
H31.10162.12862.5035
H41.93091.02382.5035

picture of methyleneazane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H4 120.408 H3 C1 N2 135.369
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS trans)

Jump to S1C1
Energy calculated at MP3=FULL/6-31G*
 hartrees
Energy at 0K-93.680896
Energy at 298.15K-93.682239
HF Energy-93.397459
Nuclear repulsion energy28.413275
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 MP3=FULL/6-31G*
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' 3545 3326 24.63      
2 A' 3109 2917 124.80      
3 A' 2370 2224 370.53      
4 A' 1240 1164 12.10      
5 A' 883 829 365.40      
6 A" 1005 943 171.49      

Unscaled Zero Point Vibrational Energy (zpe) 6076.0 cm-1
Scaled (by 0.9383) Zero Point Vibrational Energy (zpe) 5701.1 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 MP3=FULL/6-31G*
ABC
14.04617 1.31867 1.20550

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3=FULL/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.001 0.633 0.000
N2 -0.001 -0.571 0.000
H3 0.904 1.256 0.000
H4 -0.894 -1.062 0.000

Atom - Atom Distances (Å)
  C1 N2 H3 H4
C11.20411.09801.9167
N21.20412.03851.0198
H31.09802.03852.9338
H41.91671.01982.9338

picture of methyleneazane state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H4 118.820 H3 C1 N2 124.554
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability