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

using model chemistry: CCD/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 CCD/6-31G*
 hartrees
Energy at 0K-189.246737
Energy at 298.15K-189.249473
HF Energy-188.759861
Nuclear repulsion energy70.018130
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 CCD/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' 3728 3528 57.93      
2 A' 3145 2977 43.68      
3 A' 1906 1804 317.33      
4 A' 1453 1375 6.95      
5 A' 1364 1291 11.68      
6 A' 1182 1119 266.26      
7 A' 642 607 54.70      
8 A" 1078 1021 0.58      
9 A" 697 659 174.13      

Unscaled Zero Point Vibrational Energy (zpe) 7596.9 cm-1
Scaled (by 0.9465) Zero Point Vibrational Energy (zpe) 7190.5 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 CCD/6-31G*
ABC
2.57559 0.40055 0.34664

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.418 0.000
O2 -1.034 -0.440 0.000
O3 1.165 0.113 0.000
H4 -0.379 1.451 0.000
H5 -0.666 -1.343 0.000

Atom - Atom Distances (Å)
  C1 O2 O3 H4 H5
C11.34421.20421.10011.8825
O21.34422.26802.00170.9748
O31.20422.26802.04272.3391
H41.10012.00172.04272.8084
H51.88250.97482.33912.8084

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 107.469 O2 C1 O3 125.645
O2 C1 H4 109.549 O3 C1 H4 124.807
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS)

Jump to S1C1
Energy calculated at CCD/6-31G*
 hartrees
Energy at 0K-189.237625
Energy at 298.15K 
HF Energy-188.750038
Nuclear repulsion energy69.768752
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 CCD/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' 3784 3582 59.69      
2 A' 3047 2884 79.37      
3 A' 1946 1842 253.27      
4 A' 1481 1402 2.50      
5 A' 1338 1266 346.53      
6 A' 1164 1102 42.64      
7 A' 669 634 10.84      
8 A" 1061 1005 1.26      
9 A" 507 480 108.34      

Unscaled Zero Point Vibrational Energy (zpe) 7498.8 cm-1
Scaled (by 0.9465) Zero Point Vibrational Energy (zpe) 7097.6 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 CCD/6-31G*
ABC
2.88750 0.38754 0.34169

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.386 0.000
O2 -0.901 -0.624 0.000
O3 1.183 0.193 0.000
H4 -0.454 1.393 0.000
H5 -1.800 -0.257 0.000

Atom - Atom Distances (Å)
  C1 O2 O3 H4 H5
C11.35351.19841.10531.9116
O21.35352.23832.06660.9718
O31.19842.23832.03003.0168
H41.10532.06662.03002.1293
H51.91160.97183.01682.1293

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 109.488 O2 C1 O3 122.471
O2 C1 H4 113.999 O3 C1 H4 123.530
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability