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All results from a given calculation for HCNH (methyleneazane)

using model chemistry: CISD/3-21G

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 CISD/3-21G
 hartrees
Energy at 0K-93.049321
Energy at 298.15K-93.050648
HF Energy-92.863315
Nuclear repulsion energy28.156176
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 CISD/3-21G
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' 3272 3080 1.54      
2 A' 3001 2825 74.49      
3 A' 1992 1875 48.31      
4 A' 1066 1003 98.51      
5 A' 883 831 239.35      
6 A" 1016 957 10.73      

Unscaled Zero Point Vibrational Energy (zpe) 5614.3 cm-1
Scaled (by 0.9413) Zero Point Vibrational Energy (zpe) 5284.7 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 CISD/3-21G
ABC
14.41687 1.27700 1.17309

See section I.F.4 to change rotational constant units
Geometric Data calculated at CISD/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.105 0.640 0.000
N2 0.105 -0.583 0.000
H3 -0.648 1.438 0.000
H4 -0.721 -1.199 0.000

Atom - Atom Distances (Å)
  C1 N2 H3 H4
C11.22261.09752.0166
N21.22262.15651.0313
H31.09752.15652.6384
H42.01661.03132.6384

picture of methyleneazane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H4 126.730 H3 C1 N2 136.643
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS trans)

Jump to S1C1
Energy calculated at CISD/3-21G
 hartrees
Energy at 0K-93.055827
Energy at 298.15K-93.057198
HF Energy-92.868693
Nuclear repulsion energy28.088986
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 CISD/3-21G
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' 3411 3211 2.31      
2 A' 3059 2880 44.39      
3 A' 1965 1849 74.42      
4 A' 1241 1169 24.62      
5 A' 951 895 303.94      
6 A" 1063 1001 138.83      

Unscaled Zero Point Vibrational Energy (zpe) 5845.2 cm-1
Scaled (by 0.9413) Zero Point Vibrational Energy (zpe) 5502.1 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 CISD/3-21G
ABC
14.55079 1.27650 1.17355

See section I.F.4 to change rotational constant units
Geometric Data calculated at CISD/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.001 0.651 0.000
N2 -0.001 -0.583 0.000
H3 0.884 1.297 0.000
H4 -0.872 -1.125 0.000

Atom - Atom Distances (Å)
  C1 N2 H3 H4
C11.23401.09491.9777
N21.23402.07711.0255
H31.09492.07712.9904
H41.97771.02552.9904

picture of methyleneazane state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H4 121.888 H3 C1 N2 126.120
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability