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All results from a given calculation for HCNH (methyleneazane)

using model chemistry: QCISD(T)/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 QCISD(T)/6-31G*
 hartrees
Energy at 0K-93.687900
Energy at 298.15K-93.689201
HF Energy-93.391671
Nuclear repulsion energy27.885173
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 QCISD(T)/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' 3279 3145        
2 A' 3011 2888        
3 A' 1811 1738        
4 A' 1062 1019        
5 A' 894 857        
6 A" 906 870        

Unscaled Zero Point Vibrational Energy (zpe) 5481.1 cm-1
Scaled (by 0.9593) Zero Point Vibrational Energy (zpe) 5258.1 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 QCISD(T)/6-31G*
ABC
12.58114 1.27319 1.15618

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.113 0.645 0.000
N2 0.113 -0.597 0.000
H3 -0.677 1.414 0.000
H4 -0.787 -1.106 0.000

Atom - Atom Distances (Å)
  C1 N2 H3 H4
C11.24261.10251.9695
N21.24262.16121.0341
H31.10252.16122.5233
H41.96951.03412.5233

picture of methyleneazane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H4 119.507 H3 C1 N2 134.233
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS trans)

Jump to S1C1
Energy calculated at QCISD(T)/6-31G*
 hartrees
Energy at 0K-93.696576
Energy at 298.15K-93.697927
HF Energy-93.397253
Nuclear repulsion energy27.810787
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 QCISD(T)/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' 3416 3277        
2 A' 3068 2943        
3 A' 1757 1685        
4 A' 1246 1195        
5 A' 941 903        
6 A" 993 952        

Unscaled Zero Point Vibrational Energy (zpe) 5710.1 cm-1
Scaled (by 0.9593) Zero Point Vibrational Energy (zpe) 5477.7 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 QCISD(T)/6-31G*
ABC
13.01556 1.26633 1.15405

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.659 0.000
N2 0.000 -0.595 0.000
H3 0.914 1.271 0.000
H4 -0.919 -1.056 0.000

Atom - Atom Distances (Å)
  C1 N2 H3 H4
C11.25381.09981.9452
N21.25382.07771.0279
H31.09982.07772.9617
H41.94521.02792.9617

picture of methyleneazane state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H4 116.626 H3 C1 N2 123.825
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability