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All results from a given calculation for HCNH (methyleneazane)

using model chemistry: QCISD/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/6-31G*
 hartrees
Energy at 0K-93.678689
Energy at 298.15K-93.680001
HF Energy-93.391940
Nuclear repulsion energy27.952423
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/6-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3321 3163 3.96      
2 A' 3038 2893 58.32      
3 A' 1841 1753 22.12      
4 A' 1076 1025 135.85      
5 A' 908 864 110.48      
6 A" 928 884 7.24      

Unscaled Zero Point Vibrational Energy (zpe) 5555.7 cm-1
Scaled (by 0.9523) Zero Point Vibrational Energy (zpe) 5290.7 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/6-31G*
ABC
12.59185 1.28019 1.16205

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.113 0.644 0.000
N2 0.113 -0.596 0.000
H3 -0.677 1.410 0.000
H4 -0.787 -1.101 0.000

Atom - Atom Distances (Å)
  C1 N2 H3 H4
C11.23961.10061.9625
N21.23962.15611.0314
H31.10062.15612.5133
H41.96251.03142.5133

picture of methyleneazane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H4 119.289 H3 C1 N2 134.156
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS trans)

Jump to S1C1
Energy calculated at QCISD/6-31G*
 hartrees
Energy at 0K-93.687053
Energy at 298.15K-93.688410
HF Energy-93.397625
Nuclear repulsion energy27.889604
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/6-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3448 3283 1.84      
2 A' 3091 2944 33.55      
3 A' 1798 1712 25.54      
4 A' 1253 1193 14.60      
5 A' 952 907 212.18      
6 A" 1009 961 107.01      

Unscaled Zero Point Vibrational Energy (zpe) 5775.5 cm-1
Scaled (by 0.9523) Zero Point Vibrational Energy (zpe) 5500.0 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 QCISD/6-31G*
ABC
13.12304 1.27315 1.16056

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.001 0.656 0.000
N2 0.001 -0.594 0.000
H3 0.909 1.273 0.000
H4 -0.917 -1.052 0.000

Atom - Atom Distances (Å)
  C1 N2 H3 H4
C11.24961.09801.9389
N21.24962.07591.0258
H31.09802.07592.9563
H41.93891.02582.9563

picture of methyleneazane state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H4 116.543 H3 C1 N2 124.193
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability