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: CCSD/aug-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 CCSD/aug-cc-pVTZ
 hartrees
Energy at 0K-93.791845
Energy at 298.15K-93.793150
HF Energy-93.433767
Nuclear repulsion energy28.208815
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 CCSD/aug-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' 3383 3234 1.80      
2 A' 3040 2906 37.43      
3 A' 1836 1755 33.15      
4 A' 1054 1007 133.93      
5 A' 873 834 99.75      
6 A" 919 879 2.99      

Unscaled Zero Point Vibrational Energy (zpe) 5552.4 cm-1
Scaled (by 0.9558) Zero Point Vibrational Energy (zpe) 5307.0 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 CCSD/aug-cc-pVTZ
ABC
12.82592 1.30391 1.18358

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.112 0.637 0.000
N2 0.112 -0.590 0.000
H3 -0.672 1.400 0.000
H4 -0.779 -1.093 0.000

Atom - Atom Distances (Å)
  C1 N2 H3 H4
C11.22741.09361.9460
N21.22742.13901.0225
H31.09362.13902.4955
H41.94601.02252.4955

picture of methyleneazane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H4 119.464 H3 C1 N2 134.228
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS trans)

Jump to S1C1
Energy calculated at CCSD/aug-cc-pVTZ
 hartrees
Energy at 0K-93.799546
Energy at 298.15K-93.800896
HF Energy-93.439248
Nuclear repulsion energy28.158049
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 CCSD/aug-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' 3492 3338 11.94      
2 A' 3083 2947 18.66      
3 A' 1800 1720 35.15      
4 A' 1207 1154 13.59      
5 A' 920 880 218.08      
6 A" 990 946 98.18      

Unscaled Zero Point Vibrational Energy (zpe) 5746.3 cm-1
Scaled (by 0.9558) Zero Point Vibrational Energy (zpe) 5492.3 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 CCSD/aug-cc-pVTZ
ABC
13.72876 1.29312 1.18181

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.001 0.648 0.000
N2 0.001 -0.588 0.000
H3 0.889 1.282 0.000
H4 -0.902 -1.056 0.000

Atom - Atom Distances (Å)
  C1 N2 H3 H4
C11.23531.09161.9282
N21.23532.06991.0173
H31.09162.06992.9454
H41.92821.01732.9454

picture of methyleneazane state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H4 117.414 H3 C1 N2 125.526
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability