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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-93.696162
Energy at 298.15K-93.697477
HF Energy-93.398444
Nuclear repulsion energy28.006311
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
4/u)
Dep P Dep U
1 A' 3417 3217 3.15      
2 A' 3085 2904 53.85      
3 A' 1841 1733 22.31      
4 A' 1088 1024 124.26      
5 A' 903 850 110.58      
6 A" 932 877 6.76      

Unscaled Zero Point Vibrational Energy (zpe) 5632.4 cm-1
Scaled (by 0.9414) Zero Point Vibrational Energy (zpe) 5302.4 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
12.66931 1.28386 1.16573

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 0.112 0.643 0.000
N2 0.112 -0.596 0.000
H3 -0.673 1.405 0.000
H4 -0.786 -1.090 0.000

Atom - Atom Distances (Å)
  C1 N2 H3 H4
C11.23961.09441.9520
N21.23962.15021.0248
H31.09442.15022.4975
H41.95201.02482.4975

picture of methyleneazane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H4 118.779 H3 C1 N2 134.125
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-93.704466
Energy at 298.15K-93.705827
HF Energy-93.403863
Nuclear repulsion energy27.941629
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
4/u)
Dep P Dep U
1 A' 3530 3323 2.14      
2 A' 3136 2953 32.99      
3 A' 1799 1693 25.27      
4 A' 1255 1181 12.99      
5 A' 953 897 205.16      
6 A" 1016 956 99.93      

Unscaled Zero Point Vibrational Energy (zpe) 5844.3 cm-1
Scaled (by 0.9414) Zero Point Vibrational Energy (zpe) 5501.8 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
13.24359 1.27593 1.16381

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 0.655 0.000
N2 0.001 -0.594 0.000
H3 0.902 1.272 0.000
H4 -0.914 -1.046 0.000

Atom - Atom Distances (Å)
  C1 N2 H3 H4
C11.24921.09221.9311
N21.24922.07231.0200
H31.09222.07232.9443
H41.93111.02002.9443

picture of methyleneazane state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H4 116.280 H3 C1 N2 124.389
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability