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: MP2/aug-cc-pVQZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 no CS 1A'
Energy calculated at MP2/aug-cc-pVQZ
 hartrees
Energy at 0K-189.540518
Energy at 298.15K-189.543238
HF Energy-188.856209
Nuclear repulsion energy70.151555
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/aug-cc-pVQZ
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' 3755 3567 81.30      
2 A' 3128 2971 31.49      
3 A' 1798 1708 333.05      
4 A' 1411 1340 1.41      
5 A' 1305 1240 16.92      
6 A' 1134 1077 264.78      
7 A' 629 597 41.35      
8 A" 1061 1008 3.50      
9 A" 681 647 134.70      

Unscaled Zero Point Vibrational Energy (zpe) 7451.2 cm-1
Scaled (by 0.9497) Zero Point Vibrational Energy (zpe) 7076.4 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 MP2/aug-cc-pVQZ
ABC
2.60168 0.40230 0.34842

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/aug-cc-pVQZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.421 0.000
O2 -1.032 -0.438 0.000
O3 1.160 0.107 0.000
H4 -0.374 1.447 0.000
H5 -0.650 -1.327 0.000

Atom - Atom Distances (Å)
  C1 O2 O3 H4 H5
C11.34301.20221.09171.8658
O21.34302.25901.99660.9685
O31.20222.25902.03712.3094
H41.09171.99662.03712.7884
H51.86580.96852.30942.7884

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 106.515 O2 C1 O3 125.051
O2 C1 H4 109.754 O3 C1 H4 125.194
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability