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

using model chemistry: CCD/aug-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 CCD/aug-cc-pVTZ
 hartrees
Energy at 0K-189.483935
Energy at 298.15K-189.486669
HF Energy-188.845161
Nuclear repulsion energy70.501987
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/aug-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' 3819 3655 75.32      
2 A' 3119 2985 31.15      
3 A' 1873 1792 377.13      
4 A' 1434 1372 4.40      
5 A' 1340 1282 15.33      
6 A' 1168 1118 269.13      
7 A' 645 618 46.23      
8 A" 1085 1038 1.43      
9 A" 665 636 142.64      

Unscaled Zero Point Vibrational Energy (zpe) 7573.8 cm-1
Scaled (by 0.957) Zero Point Vibrational Energy (zpe) 7248.1 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 CCD/aug-cc-pVTZ
ABC
2.61543 0.40555 0.35111

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.420 0.000
O2 -1.026 -0.441 0.000
O3 1.154 0.111 0.000
H4 -0.373 1.447 0.000
H5 -0.652 -1.330 0.000

Atom - Atom Distances (Å)
  C1 O2 O3 H4 H5
C11.33931.19481.09271.8681
O21.33932.24911.99780.9650
O31.19482.24912.02872.3115
H41.09271.99782.02872.7917
H51.86810.96502.31152.7917

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 107.212 O2 C1 O3 125.036
O2 C1 H4 110.056 O3 C1 H4 124.908
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS)

Jump to S1C1
Energy calculated at CCD/aug-cc-pVTZ
 hartrees
Energy at 0K-189.477208
Energy at 298.15K 
HF Energy-188.837550
Nuclear repulsion energy70.259287
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/aug-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' 3881 3714 81.22      
2 A' 3043 2912 55.35      
3 A' 1911 1829 313.95      
4 A' 1447 1385 1.05      
5 A' 1316 1259 330.24      
6 A' 1146 1097 49.82      
7 A' 674 645 10.17      
8 A" 1062 1017 0.00      
9 A" 509 487 86.54      

Unscaled Zero Point Vibrational Energy (zpe) 7494.7 cm-1
Scaled (by 0.957) Zero Point Vibrational Energy (zpe) 7172.5 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/aug-cc-pVTZ
ABC
2.92777 0.39268 0.34624

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.384 0.000
O2 -0.893 -0.624 0.000
O3 1.174 0.196 0.000
H4 -0.458 1.382 0.000
H5 -1.784 -0.265 0.000

Atom - Atom Distances (Å)
  C1 O2 O3 H4 H5
C11.34671.18861.09831.8983
O21.34672.22372.05270.9601
O31.18862.22372.01722.9933
H41.09832.05272.01722.1146
H51.89830.96012.99332.1146

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 109.612 O2 C1 O3 122.466
O2 C1 H4 113.801 O3 C1 H4 123.734
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability