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All results from a given calculation for H2NO (nitroxide)

using model chemistry: MP2=FULL/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 2B1
1 2 no CS 2A'

Conformer 1 (C2V)

Jump to S1C2
Energy calculated at MP2=FULL/3-21G*
 hartrees
Energy at 0K-129.874133
Energy at 298.15K-129.876199
HF Energy-129.665675
Nuclear repulsion energy33.838365
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 MP2=FULL/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 A1 3489 3307 32.88      
2 A1 1732 1642 43.27      
3 A1 1284 1217 21.00      
4 B1 169 160 328.63      
5 B2 3644 3455 6.24      
6 B2 1236 1172 3.79      

Unscaled Zero Point Vibrational Energy (zpe) 5776.6 cm-1
Scaled (by 0.948) Zero Point Vibrational Energy (zpe) 5476.2 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 MP2=FULL/3-21G*
ABC
10.84879 1.03673 0.94630

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/3-21G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 -0.572
O2 0.000 0.000 0.770
H3 0.000 0.878 -1.077
H4 0.000 -0.878 -1.077

Atom - Atom Distances (Å)
  N1 O2 H3 H4
N11.34211.01271.0127
O21.34212.04482.0448
H31.01272.04481.7560
H41.01272.04481.7560

picture of nitroxide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O2 N1 H3 119.887 O2 N1 H4 119.887
H3 N1 H4 120.226
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS)

Jump to S1C1
Energy calculated at MP2=FULL/3-21G*
 hartrees
Energy at 0K-129.874133
Energy at 298.15K-129.876189
HF Energy-129.665692
Nuclear repulsion energy33.841843
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 MP2=FULL/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' 3490 3309 32.86      
2 A' 1731 1641 43.23      
3 A' 1284 1217 21.00      
4 A' 162 154 328.76      
5 A" 3646 3456 6.30      
6 A" 1236 1172 3.79      

Unscaled Zero Point Vibrational Energy (zpe) 5774.7 cm-1
Scaled (by 0.948) Zero Point Vibrational Energy (zpe) 5474.5 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 MP2=FULL/3-21G*
ABC
10.84569 1.03701 0.94651

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 -0.000 0.572 0.000
O2 -0.000 -0.770 0.000
H3 0.000 1.076 0.878
H4 0.000 1.076 -0.878

Atom - Atom Distances (Å)
  N1 O2 H3 H4
N11.34201.01261.0126
O21.34202.04432.0443
H31.01262.04431.7563
H41.01262.04431.7563

picture of nitroxide state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O2 N1 H3 119.860 O2 N1 H4 119.860
H3 N1 H4 120.280
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability