return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: B2PLYP=FULLultrafine/STO-3G

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/STO-3G
 hartrees
Energy at 0K-186.905698
Energy at 298.15K 
HF Energy-186.841974
Nuclear repulsion energy67.339294
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/STO-3G
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' 3771 3771 19.40 48.53 0.29 0.46
2 A' 3311 3311 10.59 47.52 0.37 0.55
3 A' 1855 1855 88.69 2.37 0.12 0.21
4 A' 1500 1500 0.17 14.21 0.73 0.85
5 A' 1420 1420 8.79 4.25 0.18 0.31
6 A' 1136 1136 89.43 2.15 0.12 0.22
7 A' 560 560 29.21 3.55 0.60 0.75
8 A" 984 984 8.54 0.18 0.75 0.86
9 A" 664 664 74.02 4.39 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 7600.4 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 7600.4 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=FULLultrafine/STO-3G
ABC
2.35873 0.37178 0.32116

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULLultrafine/STO-3G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.450 0.000
O2 -1.078 -0.464 0.000
O3 1.205 0.111 0.000
H4 -0.417 1.489 0.000
H5 -0.595 -1.367 0.000

Atom - Atom Distances (Å)
  C1 O2 O3 H4 H5
C11.41331.25131.11931.9116
O21.41332.35382.06171.0238
O31.25132.35382.12772.3285
H41.11932.06172.12772.8610
H51.91161.02382.32852.8610

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 102.143 O2 C1 O3 123.994
O2 C1 H4 108.428 O3 C1 H4 127.578
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS)

Jump to S1C1
Energy calculated at B2PLYP=FULLultrafine/STO-3G
 hartrees
Energy at 0K-186.897807
Energy at 298.15K 
HF Energy-186.834786
Nuclear repulsion energy67.003173
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/STO-3G
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' 3806 3806 17.40 59.98 0.30 0.46
2 A' 3208 3208 29.64 36.71 0.40 0.57
3 A' 1888 1888 71.31 1.45 0.20 0.33
4 A' 1467 1467 4.78 8.50 0.63 0.77
5 A' 1419 1419 108.88 11.85 0.62 0.77
6 A' 1154 1154 48.23 7.12 0.21 0.35
7 A' 596 596 6.96 0.89 0.67 0.80
8 A" 930 930 0.06 0.69 0.75 0.86
9 A" 482 482 49.40 4.92 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 7475.0 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 7475.0 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/STO-3G
ABC
2.59762 0.35962 0.31589

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULLultrafine/STO-3G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.409 0.000
O2 -0.938 -0.658 0.000
O3 1.229 0.196 0.000
H4 -0.488 1.424 0.000
H5 -1.840 -0.183 0.000

Atom - Atom Distances (Å)
  C1 O2 O3 H4 H5
C11.42091.24741.12641.9333
O21.42092.32912.13051.0201
O31.24742.32912.11153.0928
H41.12642.13052.11152.1003
H51.93331.02013.09282.1003

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 103.533 O2 C1 O3 121.454
O2 C1 H4 113.008 O3 C1 H4 125.538
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability