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

using model chemistry: B2PLYP=FULL/6-311G**

19 10 17 12 22

States and conformations

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

Conformer 1 (CS)

Jump to S1C2
Energy calculated at B2PLYP=FULL/6-311G**
 hartrees
Energy at 0K-189.676583
Energy at 298.15K-189.679320
HF Energy-189.483300
Nuclear repulsion energy70.203395
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=FULL/6-311G**
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' 3774 3774 57.29 70.45 0.28 0.44
2 A' 3089 3089 52.00 115.46 0.28 0.44
3 A' 1826 1826 320.01 6.29 0.25 0.40
4 A' 1424 1424 3.01 9.78 0.59 0.74
5 A' 1322 1322 7.68 0.52 0.53 0.69
6 A' 1141 1141 251.58 2.42 0.18 0.30
7 A' 634 634 47.51 4.55 0.57 0.73
8 A" 1066 1066 1.76 1.34 0.75 0.86
9 A" 703 703 150.18 1.88 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 7489.4 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 7489.4 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 B2PLYP=FULL/6-311G**
ABC
2.60365 0.40157 0.34791

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/6-311G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.421 0.000
O2 -1.031 -0.444 0.000
O3 1.160 0.114 0.000
H4 -0.387 1.446 0.000
H5 -0.646 -1.332 0.000

Atom - Atom Distances (Å)
  C1 O2 O3 H4 H5
C11.34551.20011.09611.8682
O21.34552.26081.99650.9683
O31.20012.26082.04232.3132
H41.09611.99652.04232.7904
H51.86820.96832.31322.7904

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 106.546 O2 C1 O3 125.174
O2 C1 H4 109.286 O3 C1 H4 125.540
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS)

Jump to S1C1
Energy calculated at B2PLYP=FULL/6-311G**
 hartrees
Energy at 0K-189.668120
Energy at 298.15K 
HF Energy-189.474675
Nuclear repulsion energy69.984351
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=FULL/6-311G**
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' 3840 3840 57.10 90.10 0.29 0.45
2 A' 2985 2985 97.47 108.11 0.27 0.43
3 A' 1870 1870 261.85 8.77 0.21 0.35
4 A' 1439 1439 0.53 8.05 0.62 0.76
5 A' 1290 1290 316.79 4.00 0.66 0.79
6 A' 1119 1119 46.58 7.36 0.42 0.60
7 A' 664 664 11.22 1.06 0.66 0.80
8 A" 1048 1048 0.45 1.79 0.75 0.86
9 A" 525 525 92.35 1.94 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 7389.7 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 7389.7 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 B2PLYP=FULL/6-311G**
ABC
2.91382 0.38913 0.34329

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/6-311G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.383 0.000
O2 -0.897 -0.628 0.000
O3 1.179 0.199 0.000
H4 -0.469 1.383 0.000
H5 -1.785 -0.256 0.000

Atom - Atom Distances (Å)
  C1 O2 O3 H4 H5
C11.35201.19331.10401.8962
O21.35202.23492.05590.9628
O31.19332.23492.02892.9989
H41.10402.05592.02892.1018
H51.89620.96282.99892.1018

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 108.839 O2 C1 O3 122.704
O2 C1 H4 113.288 O3 C1 H4 124.009
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability