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: CCD/cc-pVTZ

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 CCD/cc-pVTZ
 hartrees
Energy at 0K-93.777144
Energy at 298.15K-93.778441
HF Energy-93.431604
Nuclear repulsion energy28.556948
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 CCD/cc-pVTZ
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' 3448 3219 8.66      
2 A' 3042 2840 139.31      
3 A' 2267 2116 273.01      
4 A' 1056 986 128.97      
5 A' 818 764 181.30      
6 A" 945 883 3.70      

Unscaled Zero Point Vibrational Energy (zpe) 5787.7 cm-1
Scaled (by 0.9337) Zero Point Vibrational Energy (zpe) 5403.9 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 CCD/cc-pVTZ
ABC
13.23906 1.33634 1.21382

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.110 0.626 0.000
N2 0.110 -0.580 0.000
H3 -0.662 1.403 0.000
H4 -0.766 -1.101 0.000

Atom - Atom Distances (Å)
  C1 N2 H3 H4
C11.20581.09561.9365
N21.20582.12801.0189
H31.09562.12802.5065
H41.93651.01892.5065

picture of methyleneazane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H4 120.785 H3 C1 N2 135.177
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS trans)

Jump to S1C1
Energy calculated at CCD/cc-pVTZ
 hartrees
Energy at 0K-93.784854
Energy at 298.15K-93.786192
HF Energy-93.437068
Nuclear repulsion energy28.497838
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 CCD/cc-pVTZ
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' 3547 3312 32.34      
2 A' 3072 2868 94.56      
3 A' 2271 2121 306.40      
4 A' 1205 1126 11.27      
5 A' 872 814 334.63      
6 A" 981 916 149.71      

Unscaled Zero Point Vibrational Energy (zpe) 5974.0 cm-1
Scaled (by 0.9337) Zero Point Vibrational Energy (zpe) 5577.9 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 CCD/cc-pVTZ
ABC
14.23816 1.32445 1.21173

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.000 0.638 0.000
N2 -0.000 -0.576 0.000
H3 0.888 1.277 0.000
H4 -0.882 -1.076 0.000

Atom - Atom Distances (Å)
  C1 N2 H3 H4
C11.21361.09431.9279
N21.21362.05431.0141
H31.09432.05432.9446
H41.92791.01412.9446

picture of methyleneazane state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H4 119.597 H3 C1 N2 125.697
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability