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(T)/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(T)/cc-pVTZ
 hartrees
Energy at 0K-93.801446
Energy at 298.15K-93.802741
HF Energy-93.431639
Nuclear repulsion energy28.139590
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(T)/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' 3346 3262        
2 A' 3006 2931        
3 A' 1835 1789        
4 A' 1035 1009        
5 A' 859 837        
6 A" 904 882        

Unscaled Zero Point Vibrational Energy (zpe) 5492.7 cm-1
Scaled (by 0.9748) Zero Point Vibrational Energy (zpe) 5354.3 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(T)/cc-pVTZ
ABC
12.79921 1.29691 1.17759

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.112 0.639 0.000
N2 0.112 -0.591 0.000
H3 -0.673 1.404 0.000
H4 -0.779 -1.098 0.000

Atom - Atom Distances (Å)
  C1 N2 H3 H4
C11.23041.09601.9522
N21.23042.14421.0247
H31.09602.14422.5042
H41.95221.02472.5042

picture of methyleneazane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H4 119.635 H3 C1 N2 134.253
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS trans)

Jump to S1C1
Energy calculated at CCSD(T)/cc-pVTZ
 hartrees
Energy at 0K-93.809315
Energy at 298.15K-93.810661
HF Energy-93.436816
Nuclear repulsion energy28.066265
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(T)/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' 3464 3376        
2 A' 3047 2971        
3 A' 1790 1745        
4 A' 1208 1178        
5 A' 911 888        
6 A" 983 958        

Unscaled Zero Point Vibrational Energy (zpe) 5701.2 cm-1
Scaled (by 0.9748) Zero Point Vibrational Energy (zpe) 5557.5 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(T)/cc-pVTZ
ABC
13.45210 1.28717 1.17476

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.651 0.000
N2 0.000 -0.589 0.000
H3 0.901 1.274 0.000
H4 -0.906 -1.055 0.000

Atom - Atom Distances (Å)
  C1 N2 H3 H4
C11.24041.09451.9318
N21.24042.06911.0192
H31.09452.06912.9472
H41.93181.01922.9472

picture of methyleneazane state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H4 117.161 H3 C1 N2 124.671
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability