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

using model chemistry: B2PLYP=FULL/6-31G

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/6-31G
 hartrees
Energy at 0K-189.463086
Energy at 298.15K-189.465773
HF Energy-189.341958
Nuclear repulsion energy68.558979
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/6-31G
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' 3599 3599 34.27 90.44 0.30 0.47
2 A' 3190 3190 33.84 110.02 0.27 0.43
3 A' 1701 1701 244.96 4.74 0.25 0.40
4 A' 1420 1420 5.85 11.80 0.62 0.76
5 A' 1303 1303 8.50 1.21 0.64 0.78
6 A' 1068 1068 264.10 4.45 0.16 0.27
7 A' 601 601 47.95 6.31 0.63 0.78
8 A" 1047 1047 7.63 1.62 0.75 0.86
9 A" 683 683 218.43 3.47 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 7305.3 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 7305.3 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/6-31G
ABC
2.50516 0.38117 0.33083

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/6-31G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.435 0.000
O2 -1.052 -0.454 0.000
O3 1.192 0.119 0.000
H4 -0.390 1.452 0.000
H5 -0.732 -1.383 0.000

Atom - Atom Distances (Å)
  C1 O2 O3 H4 H5
C11.37771.23351.08881.9606
O21.37772.31622.01770.9829
O31.23352.31622.06892.4413
H41.08882.01772.06892.8558
H51.96060.98292.44132.8558

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 111.213 O2 C1 O3 124.923
O2 C1 H4 109.220 O3 C1 H4 125.857
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS)

Jump to S1C1
Energy calculated at B2PLYP=FULL/6-31G
 hartrees
Energy at 0K-189.453404
Energy at 298.15K 
HF Energy-189.332233
Nuclear repulsion energy68.464373
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/6-31G
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' 3653 3653 33.84 124.66 0.30 0.46
2 A' 3063 3063 77.03 97.09 0.29 0.45
3 A' 1763 1763 195.35 6.72 0.15 0.26
4 A' 1450 1450 1.52 11.70 0.64 0.78
5 A' 1210 1210 285.28 7.66 0.71 0.83
6 A' 1083 1083 83.35 9.65 0.29 0.45
7 A' 636 636 10.82 1.81 0.71 0.83
8 A" 1028 1028 0.05 1.96 0.75 0.86
9 A" 504 504 143.49 3.50 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 7194.1 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 7194.1 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/6-31G
ABC
2.80631 0.37169 0.32822

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/6-31G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.401 0.000
O2 -0.921 -0.631 0.000
O3 1.208 0.194 0.000
H4 -0.449 1.403 0.000
H5 -1.846 -0.316 0.000

Atom - Atom Distances (Å)
  C1 O2 O3 H4 H5
C11.38261.22521.09791.9803
O21.38262.28252.08730.9776
O31.22522.28252.05093.0960
H41.09792.08732.05092.2145
H51.98030.97763.09602.2145

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 112.956 O2 C1 O3 122.032
O2 C1 H4 114.097 O3 C1 H4 123.871
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability