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All results from a given calculation for HCNH (methyleneazane)

using model chemistry: QCISD/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 QCISD/3-21G
 hartrees
Energy at 0K-93.067723
Energy at 298.15K-93.069042
HF Energy-92.863166
Nuclear repulsion energy27.751236
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/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' 3165 3068 10.57      
2 A' 2955 2864 67.34      
3 A' 1762 1707 9.18      
4 A' 1041 1009 126.15      
5 A' 928 899 171.08      
6 A" 947 918 9.58      

Unscaled Zero Point Vibrational Energy (zpe) 5398.5 cm-1
Scaled (by 0.9692) Zero Point Vibrational Energy (zpe) 5232.3 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 QCISD/3-21G
ABC
13.78196 1.24187 1.13921

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.108 0.653 0.000
N2 0.108 -0.594 0.000
H3 -0.664 1.438 0.000
H4 -0.736 -1.198 0.000

Atom - Atom Distances (Å)
  C1 N2 H3 H4
C11.24621.10142.0340
N21.24622.17341.0382
H31.10142.17342.6371
H42.03401.03822.6371

picture of methyleneazane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H4 125.600 H3 C1 N2 135.496
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS trans)

Jump to S1C1
Energy calculated at QCISD/3-21G
 hartrees
Energy at 0K-93.074336
Energy at 298.15K-93.075703
HF Energy-92.868104
Nuclear repulsion energy27.631034
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/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' 3314 3212 0.93      
2 A' 3026 2933 37.65      
3 A' 1684 1632 10.39      
4 A' 1237 1199 27.03      
5 A' 979 949 223.73      
6 A" 1020 989 105.96      

Unscaled Zero Point Vibrational Energy (zpe) 5630.1 cm-1
Scaled (by 0.9692) Zero Point Vibrational Energy (zpe) 5456.7 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/3-21G
ABC
13.70054 1.23745 1.13494

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.001 0.666 0.000
N2 -0.001 -0.596 0.000
H3 0.901 1.292 0.000
H4 -0.895 -1.112 0.000

Atom - Atom Distances (Å)
  C1 N2 H3 H4
C11.26221.09801.9900
N21.26222.09291.0321
H31.09802.09293.0010
H41.99001.03213.0010

picture of methyleneazane state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H4 119.973 H3 C1 N2 124.785
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability