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

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

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/6-31+G**
 hartrees
Energy at 0K-189.610850
Energy at 298.15K 
HF Energy-189.440271
Nuclear repulsion energy69.855498
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/6-31+G**
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' 3763 3763 68.33 69.70 0.19 0.32
2 A' 3141 3141 36.27 117.18 0.29 0.44
3 A' 1806 1806 373.82 12.36 0.16 0.28
4 A' 1416 1416 1.99 7.37 0.59 0.75
5 A' 1300 1300 15.36 1.74 0.27 0.43
6 A' 1135 1135 268.19 3.37 0.18 0.30
7 A' 622 622 45.99 3.82 0.50 0.66
8 A" 1055 1055 3.07 1.86 0.75 0.86
9 A" 685 685 163.15 0.40 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 7461.6 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 7461.6 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/6-31+G**
ABC
2.57527 0.39780 0.34458

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.424 0.000
O2 -1.037 -0.438 0.000
O3 1.168 0.106 0.000
H4 -0.373 1.452 0.000
H5 -0.669 -1.338 0.000

Atom - Atom Distances (Å)
  C1 O2 O3 H4 H5
C11.34901.21001.09401.8852
O21.34902.27102.00400.9725
O31.21002.27102.04612.3365
H41.09402.00402.04612.8065
H51.88520.97252.33652.8065

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 107.489 O2 C1 O3 125.020
O2 C1 H4 109.791 O3 C1 H4 125.189
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS)

Jump to S1C1
Energy calculated at B2PLYP=FULLultrafine/6-31+G**
 hartrees
Energy at 0K-189.602937
Energy at 298.15K 
HF Energy-189.432052
Nuclear repulsion energy69.652007
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/6-31+G**
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' 3822 3822 64.70 105.12 0.22 0.37
2 A' 3045 3045 75.74 116.55 0.28 0.44
3 A' 1850 1850 302.15 16.89 0.20 0.33
4 A' 1438 1438 0.39 5.77 0.60 0.75
5 A' 1275 1275 334.10 2.38 0.66 0.79
6 A' 1114 1114 43.55 9.07 0.39 0.56
7 A' 652 652 10.42 1.22 0.63 0.77
8 A" 1036 1036 0.00 2.19 0.75 0.86
9 A" 529 529 105.27 0.52 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 7380.1 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 7380.1 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/6-31+G**
ABC
2.88248 0.38590 0.34034

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.388 0.000
O2 -0.905 -0.621 0.000
O3 1.187 0.189 0.000
H4 -0.454 1.391 0.000
H5 -1.803 -0.262 0.000

Atom - Atom Distances (Å)
  C1 O2 O3 H4 H5
C11.35541.20311.10081.9163
O21.35542.24292.06220.9676
O31.20312.24292.03343.0233
H41.10082.06222.03342.1332
H51.91630.96763.02332.1332

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 110.037 O2 C1 O3 122.366
O2 C1 H4 113.786 O3 C1 H4 123.848
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability