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

using model chemistry: CID/cc-pVTZ

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 CID/cc-pVTZ
 hartrees
Energy at 0K-189.405321
Energy at 298.15K-189.408092
HF Energy-188.843056
Nuclear repulsion energy71.031600
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 CID/cc-pVTZ
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' 3946 3656 88.75      
2 A' 3195 2961 39.32      
3 A' 1939 1796 390.77      
4 A' 1479 1370 6.78      
5 A' 1379 1277 20.58      
6 A' 1210 1121 264.46      
7 A' 665 616 52.59      
8 A" 1134 1050 0.23      
9 A" 690 639 154.42      

Unscaled Zero Point Vibrational Energy (zpe) 7818.2 cm-1
Scaled (by 0.9265) Zero Point Vibrational Energy (zpe) 7243.6 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 CID/cc-pVTZ
ABC
2.64942 0.41193 0.35650

See section I.F.4 to change rotational constant units
Geometric Data calculated at CID/cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.417 0.000
O2 -1.018 -0.437 0.000
O3 1.146 0.109 0.000
H4 -0.368 1.439 0.000
H5 -0.653 -1.321 0.000

Atom - Atom Distances (Å)
  C1 O2 O3 H4 H5
C11.32871.18611.08651.8571
O21.32872.23141.98560.9566
O31.18612.23142.01502.2983
H41.08651.98562.01502.7753
H51.85710.95662.29832.7753

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 107.584 O2 C1 O3 124.968
O2 C1 H4 110.186 O3 C1 H4 124.847
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS)

Jump to S1C1
Energy calculated at CID/cc-pVTZ
 hartrees
Energy at 0K-189.397860
Energy at 298.15K 
HF Energy-188.835104
Nuclear repulsion energy70.789874
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 CID/cc-pVTZ
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' 4018 3723 96.07      
2 A' 3118 2889 69.41      
3 A' 1981 1835 329.86      
4 A' 1499 1389 1.79      
5 A' 1355 1256 360.04      
6 A' 1188 1100 32.64      
7 A' 699 647 10.72      
8 A" 1113 1032 0.76      
9 A" 520 482 91.99      

Unscaled Zero Point Vibrational Energy (zpe) 7745.6 cm-1
Scaled (by 0.9265) Zero Point Vibrational Energy (zpe) 7176.3 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 CID/cc-pVTZ
ABC
2.99188 0.39782 0.35113

See section I.F.4 to change rotational constant units
Geometric Data calculated at CID/cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.379 0.000
O2 -0.887 -0.619 0.000
O3 1.166 0.197 0.000
H4 -0.457 1.371 0.000
H5 -1.771 -0.266 0.000

Atom - Atom Distances (Å)
  C1 O2 O3 H4 H5
C11.33531.17991.09221.8847
O21.33532.20942.03590.9513
O31.17992.20942.00272.9730
H41.09222.03592.00272.0994
H51.88470.95132.97302.0994

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 109.889 O2 C1 O3 122.786
O2 C1 H4 113.631 O3 C1 H4 123.583
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability