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

using model chemistry: PM6

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description

Conformer 1 (CS)

Jump to S1C2
Vibrational Frequencies calculated at PM6
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' 2675 2842 63.45      
2 A' 2550 2709 267.87      
3 A' 1793 1905 436.54      
4 A' 1284 1364 40.18      
5 A' 1188 1262 279.05      
6 A' 1060 1127 72.22      
7 A' 546 580 43.78      
8 A" 959 1019 2.46      
9 A" 621 659 217.26      

Unscaled Zero Point Vibrational Energy (zpe) 6337.3 cm-1
Scaled (by 1.0624) Zero Point Vibrational Energy (zpe) 6732.8 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 PM6
ABC
2.34758 0.40720 0.34701

See section I.F.4 to change rotational constant units
Geometric Data calculated at PM6

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.461 0.000
O2 -1.011 -0.464 0.000
O3 1.153 0.111 0.000
H4 -0.448 1.455 0.000
H5 -0.693 -1.405 0.000

Atom - Atom Distances (Å)
  C1 O2 O3 H4 H5
C11.37001.20531.09021.9907
O21.37002.23891.99940.9935
O31.20532.23892.09082.3887
H41.09021.99942.09082.8705
H51.99070.99352.38872.8705

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 113.810 O2 C1 O3 120.634
O2 C1 H4 108.184 O3 C1 H4 131.182
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS)

Jump to S1C1
Energy calculated at PM6
 hartrees
Energy at 0K 
Energy at 298.15K-0.126490
HF Energy-0.126490
Nuclear repulsion energy58.381795
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 PM6
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' 2651 2817 12.16      
2 A' 2524 2682 282.29      
3 A' 1797 1909 445.86      
4 A' 1221 1297 56.82      
5 A' 1159 1231 96.56      
6 A' 1111 1180 276.92      
7 A' 565 600 5.78      
8 A" 951 1010 1.74      
9 A" 432 459 108.90      

Unscaled Zero Point Vibrational Energy (zpe) 6204.7 cm-1
Scaled (by 1.0624) Zero Point Vibrational Energy (zpe) 6591.9 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 PM6
ABC
2.56834 0.39683 0.34373

See section I.F.4 to change rotational constant units
Geometric Data calculated at PM6

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.440 0.000
O2 -0.882 -0.627 0.000
O3 1.170 0.168 0.000
H4 -0.471 1.422 0.000
H5 -1.831 -0.385 0.000

Atom - Atom Distances (Å)
  C1 O2 O3 H4 H5
C11.38421.20101.08952.0084
O21.38422.20032.09000.9795
O31.20102.20032.06553.0514
H41.08952.09002.06552.2619
H52.00840.97953.05142.2619

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 115.285 O2 C1 O3 116.489
O2 C1 H4 114.802 O3 C1 H4 128.709
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability