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

using model chemistry: MP3=FULL/6-311G**

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 MP3=FULL/6-311G**
 hartrees
Energy at 0K-189.407180
Energy at 298.15K-189.409937
HF Energy-188.819298
Nuclear repulsion energy70.646945
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 MP3=FULL/6-311G**
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' 3907 3907 62.17      
2 A' 3142 3142 46.75      
3 A' 1926 1926 354.65      
4 A' 1466 1466 8.25      
5 A' 1372 1372 11.65      
6 A' 1193 1193 263.93      
7 A' 657 657 53.51      
8 A" 1098 1098 0.47      
9 A" 688 688 156.63      

Unscaled Zero Point Vibrational Energy (zpe) 7723.7 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 7723.7 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 MP3=FULL/6-311G**
ABC
2.62365 0.40726 0.35253

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3=FULL/6-311G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.419 0.000
O2 -1.024 -0.443 0.000
O3 1.151 0.113 0.000
H4 -0.381 1.447 0.000
H5 -0.638 -1.323 0.000

Atom - Atom Distances (Å)
  C1 O2 O3 H4 H5
C11.33821.19111.09591.8549
O21.33822.24501.99580.9610
O31.19112.24502.03092.2941
H41.09591.99582.03092.7813
H51.85490.96102.29412.7813

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 106.398 O2 C1 O3 125.045
O2 C1 H4 109.754 O3 C1 H4 125.200
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS)

Jump to S1C1
Energy calculated at MP3=FULL/6-311G**
 hartrees
Energy at 0K-189.398973
Energy at 298.15K 
HF Energy-188.810009
Nuclear repulsion energy70.392050
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 MP3=FULL/6-311G**
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' 3969 3969 69.51      
2 A' 3047 3047 83.32      
3 A' 1964 1964 293.79      
4 A' 1483 1483 1.95      
5 A' 1347 1347 339.74      
6 A' 1166 1166 45.52      
7 A' 684 684 12.51      
8 A" 1078 1078 1.01      
9 A" 499 499 95.98      

Unscaled Zero Point Vibrational Energy (zpe) 7619.0 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 7619.0 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 MP3=FULL/6-311G**
ABC
2.94420 0.39367 0.34724

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3=FULL/6-311G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.380 0.000
O2 -0.892 -0.627 0.000
O3 1.171 0.200 0.000
H4 -0.465 1.380 0.000
H5 -1.771 -0.251 0.000

Atom - Atom Distances (Å)
  C1 O2 O3 H4 H5
C11.34491.18501.10321.8802
O21.34492.22262.05170.9559
O31.18502.22262.01772.9767
H41.10322.05172.01772.0896
H51.88020.95592.97672.0896

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 108.422 O2 C1 O3 122.809
O2 C1 H4 113.510 O3 C1 H4 123.681
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability