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

using model chemistry: PBEPBE/6-311+G(3df,2pd)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at PBEPBE/6-311+G(3df,2pd)
 hartrees
Energy at 0K-189.638136
Energy at 298.15K-189.640817
HF Energy-189.638136
Nuclear repulsion energy69.771590
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 PBEPBE/6-311+G(3df,2pd)
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' 3616 3580 42.35      
2 A' 2964 2934 44.18      
3 A' 1765 1747 335.39      
4 A' 1351 1338 1.14      
5 A' 1259 1246 7.45      
6 A' 1084 1073 232.06      
7 A' 606 599 38.68      
8 A" 1004 994 4.08      
9 A" 679 673 123.70      

Unscaled Zero Point Vibrational Energy (zpe) 7163.5 cm-1
Scaled (by 0.99) Zero Point Vibrational Energy (zpe) 7091.9 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 PBEPBE/6-311+G(3df,2pd)
ABC
2.57301 0.39684 0.34381

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/6-311+G(3df,2pd)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.422 0.000
O2 -1.037 -0.445 0.000
O3 1.167 0.115 0.000
H4 -0.389 1.458 0.000
H5 -0.650 -1.345 0.000

Atom - Atom Distances (Å)
  C1 O2 O3 H4 H5
C11.35211.20681.10661.8827
O21.35212.27422.01070.9794
O31.20682.27422.05582.3304
H41.10662.01072.05582.8150
H51.88270.97942.33042.8150

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 106.604 O2 C1 O3 125.331
O2 C1 H4 109.317 O3 C1 H4 125.352
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-311+G(3df,2pd) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.698      
2 O -0.357      
3 O -0.578      
4 H 0.056      
5 H 0.181      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.466 -0.320 0.000 1.500
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.225 -0.028 0.000
y -0.028 -13.156 0.000
z 0.000 0.000 -17.284
Traceless
 xyz
x -7.005 -0.028 0.000
y -0.028 6.599 0.000
z 0.000 0.000 0.406
Polar
3z2-r20.812
x2-y2-9.069
xy-0.028
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.252 0.137 0.000
y 0.137 3.744 0.000
z 0.000 0.000 2.402


<r2> (average value of r2) Å2
<r2> 37.735
(<r2>)1/2 6.143