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

using model chemistry: MP3/TZVP

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 MP3/TZVP
 hartrees
Energy at 0K-189.367811
Energy at 298.15K-189.370555
HF Energy-188.836285
Nuclear repulsion energy70.575261
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 MP3/TZVP
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' 3870 3619 65.08      
2 A' 3160 2956 38.63      
3 A' 1905 1782 378.91      
4 A' 1478 1382 6.03      
5 A' 1360 1272 11.47      
6 A' 1180 1104 281.22      
7 A' 658 615 50.73      
8 A" 1086 1016 0.90      
9 A" 666 623 165.72      

Unscaled Zero Point Vibrational Energy (zpe) 7681.6 cm-1
Scaled (by 0.9352) Zero Point Vibrational Energy (zpe) 7183.9 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 MP3/TZVP
ABC
2.61355 0.40672 0.35195

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3/TZVP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.421 0.000
O2 -1.024 -0.443 0.000
O3 1.152 0.112 0.000
H4 -0.373 1.446 0.000
H5 -0.647 -1.330 0.000

Atom - Atom Distances (Å)
  C1 O2 O3 H4 H5
C11.33961.19251.09151.8661
O21.33962.24591.99810.9642
O31.19252.24592.02642.3053
H41.09151.99812.02642.7896
H51.86610.96422.30532.7896

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 107.060 O2 C1 O3 124.891
O2 C1 H4 110.123 O3 C1 H4 124.986
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS)

Jump to S1C1
Energy calculated at MP3/TZVP
 hartrees
Energy at 0K-189.360283
Energy at 298.15K 
HF Energy-188.827521
Nuclear repulsion energy70.328911
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 MP3/TZVP
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' 3928 3674 71.26      
2 A' 3070 2871 70.66      
3 A' 1945 1819 311.54      
4 A' 1497 1400 1.37      
5 A' 1334 1248 334.67      
6 A' 1154 1079 57.36      
7 A' 685 641 12.40      
8 A" 1067 997 0.52      
9 A" 492 460 102.48      

Unscaled Zero Point Vibrational Energy (zpe) 7585.7 cm-1
Scaled (by 0.9352) Zero Point Vibrational Energy (zpe) 7094.2 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 MP3/TZVP
ABC
2.92737 0.39358 0.34693

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3/TZVP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.383 0.000
O2 -0.892 -0.626 0.000
O3 1.172 0.198 0.000
H4 -0.459 1.382 0.000
H5 -1.778 -0.258 0.000

Atom - Atom Distances (Å)
  C1 O2 O3 H4 H5
C11.34691.18621.09851.8906
O21.34692.22182.05360.9595
O31.18622.22182.01482.9849
H41.09852.05362.01482.1049
H51.89060.95952.98492.1049

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 108.951 O2 C1 O3 122.461
O2 C1 H4 113.846 O3 C1 H4 123.694
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability