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

using model chemistry: QCISD/Def2TZVPP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 2 yes CS 1A'

Conformer 1 (CS)

Jump to S1C2
Vibrational Frequencies calculated at QCISD/Def2TZVPP
Rotational Constants (cm-1) from geometry optimized at QCISD/Def2TZVPP
See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/Def2TZVPP
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS)

Jump to S1C1
Energy calculated at QCISD/Def2TZVPP
 hartrees
Energy at 0K-189.478351
Energy at 298.15K 
HF Energy-188.842987
Nuclear repulsion energy70.144542
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 QCISD/Def2TZVPP
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' 3873 3873 68.58      
2 A' 3034 3034 67.77      
3 A' 1885 1885 278.22      
4 A' 1445 1445 0.44      
5 A' 1311 1311 309.42      
6 A' 1138 1138 52.34      
7 A' 669 669 10.30      
8 A" 1054 1054 0.08      
9 A" 513 513 86.78      

Unscaled Zero Point Vibrational Energy (zpe) 7460.9 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 7460.9 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 QCISD/Def2TZVPP
ABC
2.92140 0.39115 0.34496

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/Def2TZVPP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.384 0.000
O2 -0.896 -0.624 0.000
O3 1.176 0.196 0.000
H4 -0.461 1.381 0.000
H5 -1.783 -0.257 0.000

Atom - Atom Distances (Å)
  C1 O2 O3 H4 H5
C11.34901.19131.09861.8947
O21.34902.22882.05260.9599
O31.19132.22882.02112.9937
H41.09862.05262.02112.1057
H51.89470.95992.99372.1057

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 109.132 O2 C1 O3 122.532
O2 C1 H4 113.598 O3 C1 H4 123.870
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability