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

using model chemistry: B3PW91/6-311G*

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 B3PW91/6-311G*
 hartrees
Energy at 0K-189.735450
Energy at 298.15K-189.738192
HF Energy-189.735450
Nuclear repulsion energy70.376970
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 B3PW91/6-311G*
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' 3733 3594 33.99      
2 A' 3069 2955 59.46      
3 A' 1858 1789 360.14      
4 A' 1419 1366 4.58      
5 A' 1323 1274 7.12      
6 A' 1155 1112 256.56      
7 A' 635 611 51.67      
8 A" 1055 1016 1.98      
9 A" 727 700 170.81      

Unscaled Zero Point Vibrational Energy (zpe) 7486.7 cm-1
Scaled (by 0.9627) Zero Point Vibrational Energy (zpe) 7207.5 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 B3PW91/6-311G*
ABC
2.61324 0.40393 0.34985

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-311G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.419 0.000
O2 -1.027 -0.442 0.000
O3 1.157 0.114 0.000
H4 -0.388 1.447 0.000
H5 -0.657 -1.338 0.000

Atom - Atom Distances (Å)
  C1 O2 O3 H4 H5
C11.33971.19651.09911.8753
O21.33972.25341.99430.9693
O31.19652.25342.04042.3233
H41.09911.99432.04042.7980
H51.87530.96932.32332.7980

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 107.537 O2 C1 O3 125.273
O2 C1 H4 109.325 O3 C1 H4 125.403
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.192      
2 O -0.468      
3 O -0.325      
4 H 0.201      
5 H 0.400      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.361 -0.460 0.000 1.437
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -21.985 -0.070 0.000
y -0.070 -12.446 0.000
z 0.000 0.000 -16.764
Traceless
 xyz
x -7.380 -0.070 0.000
y -0.070 6.929 0.000
z 0.000 0.000 0.451
Polar
3z2-r20.902
x2-y2-9.539
xy-0.070
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.168 0.055 0.000
y 0.055 2.875 0.000
z 0.000 0.000 1.424


<r2> (average value of r2) Å2
<r2> 36.985
(<r2>)1/2 6.082

Conformer 2 (CS)

Jump to S1C1
Energy calculated at B3PW91/6-311G*
 hartrees
Energy at 0K-189.726646
Energy at 298.15K 
HF Energy-189.726646
Nuclear repulsion energy70.140759
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 B3PW91/6-311G*
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' 3791 3650 31.62      
2 A' 2957 2847 111.95      
3 A' 1905 1834 291.51      
4 A' 1445 1391 2.14      
5 A' 1297 1248 342.49      
6 A' 1125 1083 37.73      
7 A' 668 643 10.80      
8 A" 1038 1000 0.66      
9 A" 544 524 110.41      

Unscaled Zero Point Vibrational Energy (zpe) 7384.6 cm-1
Scaled (by 0.9627) Zero Point Vibrational Energy (zpe) 7109.1 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 B3PW91/6-311G*
ABC
2.93948 0.39069 0.34485

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-311G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.381 0.000
O2 -0.893 -0.627 0.000
O3 1.176 0.202 0.000
H4 -0.469 1.385 0.000
H5 -1.791 -0.274 0.000

Atom - Atom Distances (Å)
  C1 O2 O3 H4 H5
C11.34691.18921.10761.9071
O21.34692.22902.05590.9643
O31.18922.22902.02543.0046
H41.10762.05592.02542.1215
H51.90710.96433.00462.1215

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 110.105 O2 C1 O3 122.896
O2 C1 H4 113.422 O3 C1 H4 123.683
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.196      
2 O -0.457      
3 O -0.298      
4 H 0.155      
5 H 0.404      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -3.694 1.598 0.000 4.025
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -15.191 -1.250 0.000
y -1.250 -17.362 0.000
z 0.000 0.000 -16.774
Traceless
 xyz
x 1.877 -1.250 0.000
y -1.250 -1.380 0.000
z 0.000 0.000 -0.497
Polar
3z2-r2-0.995
x2-y22.171
xy-1.250
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.770 0.098 0.000
y 0.098 2.403 0.000
z 0.000 0.000 1.424


<r2> (average value of r2) Å2
<r2> 37.474
(<r2>)1/2 6.122