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

using model chemistry: LSDA/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 LSDA/6-31G**
 hartrees
Energy at 0K-188.808244
Energy at 298.15K-188.810952
HF Energy-188.808244
Nuclear repulsion energy70.174674
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 LSDA/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' 3608 3541 37.72      
2 A' 2980 2924 46.52      
3 A' 1846 1811 278.81      
4 A' 1350 1325 3.86      
5 A' 1296 1272 25.03      
6 A' 1130 1109 191.10      
7 A' 605 594 57.96      
8 A" 1014 995 3.11      
9 A" 726 712 143.71      

Unscaled Zero Point Vibrational Energy (zpe) 7277.5 cm-1
Scaled (by 0.9813) Zero Point Vibrational Energy (zpe) 7141.4 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 LSDA/6-31G**
ABC
2.56021 0.40475 0.34950

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.420 0.000
O2 -1.034 -0.424 0.000
O3 1.160 0.090 0.000
H4 -0.376 1.467 0.000
H5 -0.634 -1.324 0.000

Atom - Atom Distances (Å)
  C1 O2 O3 H4 H5
C11.33501.20651.11201.8563
O21.33502.25412.00210.9854
O31.20652.25412.06282.2851
H41.11202.00212.06282.8032
H51.85630.98542.28512.8032

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 105.264 O2 C1 O3 124.903
O2 C1 H4 109.470 O3 C1 H4 125.627
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at LSDA/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.298      
2 O -0.401      
3 O -0.366      
4 H 0.132      
5 H 0.336      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.369 -0.509 0.000 1.461
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -21.341 0.075 0.000
y 0.075 -12.650 0.000
z 0.000 0.000 -16.699
Traceless
 xyz
x -6.667 0.075 0.000
y 0.075 6.370 0.000
z 0.000 0.000 0.296
Polar
3z2-r20.593
x2-y2-8.691
xy0.075
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.169 0.068 0.000
y 0.068 3.055 0.000
z 0.000 0.000 1.363


<r2> (average value of r2) Å2
<r2> 36.895
(<r2>)1/2 6.074

Conformer 2 (CS)

Jump to S1C1
Energy calculated at LSDA/6-31G**
 hartrees
Energy at 0K-188.800021
Energy at 298.15K 
HF Energy-188.800021
Nuclear repulsion energy69.930751
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 LSDA/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' 3684 3616 34.93      
2 A' 2863 2809 94.70      
3 A' 1896 1860 229.09      
4 A' 1382 1356 1.88      
5 A' 1255 1232 323.88      
6 A' 1121 1100 2.13      
7 A' 648 636 8.12      
8 A" 1003 985 0.19      
9 A" 553 543 92.15      

Unscaled Zero Point Vibrational Energy (zpe) 7203.1 cm-1
Scaled (by 0.9813) Zero Point Vibrational Energy (zpe) 7068.4 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 LSDA/6-31G**
ABC
2.88234 0.39100 0.34430

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.381 0.000
O2 -0.900 -0.613 0.000
O3 1.182 0.181 0.000
H4 -0.462 1.402 0.000
H5 -1.800 -0.229 0.000

Atom - Atom Distances (Å)
  C1 O2 O3 H4 H5
C11.34061.19931.12111.9005
O21.34062.22842.06200.9786
O31.19932.22842.04873.0105
H41.12112.06202.04872.1095
H51.90050.97863.01052.1095

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 109.066 O2 C1 O3 122.556
O2 C1 H4 113.484 O3 C1 H4 123.960
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at LSDA/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.306      
2 O -0.397      
3 O -0.338      
4 H 0.089      
5 H 0.340      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -3.554 1.369 0.000 3.809
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -15.014 -1.067 0.000
y -1.067 -17.197 0.000
z 0.000 0.000 -16.706
Traceless
 xyz
x 1.938 -1.067 0.000
y -1.067 -1.337 0.000
z 0.000 0.000 -0.601
Polar
3z2-r2-1.202
x2-y22.183
xy-1.067
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.914 0.080 0.000
y 0.080 2.483 0.000
z 0.000 0.000 1.362


<r2> (average value of r2) Å2
<r2> 37.456
(<r2>)1/2 6.120