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All results from a given calculation for HCOOH (Formic acid)

using model chemistry: B2PLYP=FULLultrafine/6-31G**

19 10 17 12 22

States and conformations

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

Conformer 1 (CS)

Jump to S1C2
Energy calculated at B2PLYP=FULLultrafine/6-31G**
 hartrees
Energy at 0K-189.596994
Energy at 298.15K 
HF Energy-189.429891
Nuclear repulsion energy69.973972
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 B2PLYP=FULLultrafine/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' 3772 3772 52.21 70.52 0.28 0.43
2 A' 3126 3126 48.72 100.60 0.28 0.44
3 A' 1841 1841 296.10 6.31 0.22 0.36
4 A' 1430 1430 3.47 9.83 0.61 0.76
5 A' 1329 1329 11.82 1.02 0.35 0.52
6 A' 1148 1148 241.29 2.71 0.18 0.31
7 A' 626 626 50.09 4.31 0.60 0.75
8 A" 1065 1065 1.12 2.17 0.75 0.86
9 A" 708 708 155.93 2.07 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 7521.6 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 7521.6 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 B2PLYP=FULLultrafine/6-31G**
ABC
2.58639 0.39912 0.34576

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULLultrafine/6-31G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.423 0.000
O2 -1.037 -0.438 0.000
O3 1.166 0.106 0.000
H4 -0.379 1.450 0.000
H5 -0.652 -1.330 0.000

Atom - Atom Distances (Å)
  C1 O2 O3 H4 H5
C11.34711.20781.09531.8700
O21.34712.26821.99910.9717
O31.20782.26822.04762.3164
H41.09531.99912.04762.7936
H51.87000.97172.31642.7936

picture of Formic acid state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 O2 H5 106.379 O2 C1 O3 125.112
O2 C1 H4 109.441 O3 C1 H4 125.446
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS)

Jump to S1C1
Energy calculated at B2PLYP=FULLultrafine/6-31G**
 hartrees
Energy at 0K-189.588404
Energy at 298.15K 
HF Energy-189.421171
Nuclear repulsion energy69.750054
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 B2PLYP=FULLultrafine/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' 3833 3833 48.72 94.45 0.28 0.44
2 A' 3021 3021 90.46 87.62 0.28 0.44
3 A' 1887 1887 241.16 8.57 0.20 0.33
4 A' 1456 1456 0.80 8.95 0.61 0.76
5 A' 1293 1293 328.40 3.91 0.65 0.78
6 A' 1136 1136 31.37 8.46 0.35 0.52
7 A' 658 658 9.72 1.05 0.72 0.84
8 A" 1050 1050 1.01 2.48 0.75 0.86
9 A" 528 528 96.08 2.44 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 7430.8 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 7430.8 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 B2PLYP=FULLultrafine/6-31G**
ABC
2.89412 0.38680 0.34120

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULLultrafine/6-31G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.385 0.000
O2 -0.903 -0.622 0.000
O3 1.185 0.191 0.000
H4 -0.460 1.388 0.000
H5 -1.796 -0.251 0.000

Atom - Atom Distances (Å)
  C1 O2 O3 H4 H5
C11.35321.20101.10291.9052
O21.35322.24122.05850.9664
O31.20102.24122.03423.0135
H41.10292.05852.03422.1147
H51.90520.96643.01352.1147

picture of Formic acid state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 O2 H5 109.305 O2 C1 O3 122.562
O2 C1 H4 113.494 O3 C1 H4 123.944
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability