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

using model chemistry: B3PW91/6-31+G**

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 B3PW91/6-31+G**
 hartrees
Energy at 0K-189.699789
Energy at 298.15K-189.702507
HF Energy-189.699789
Nuclear repulsion energy70.105316
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 B3PW91/6-31+G**
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' 3769 3618 63.30      
2 A' 3097 2974 41.49      
3 A' 1840 1767 394.66      
4 A' 1403 1347 2.74      
5 A' 1303 1251 22.91      
6 A' 1147 1101 251.85      
7 A' 625 600 49.00      
8 A" 1052 1010 2.68      
9 A" 691 663 161.34      

Unscaled Zero Point Vibrational Energy (zpe) 7463.1 cm-1
Scaled (by 0.9601) Zero Point Vibrational Energy (zpe) 7165.3 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 B3PW91/6-31+G**
ABC
2.58357 0.40142 0.34743

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-31+G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.422 0.000
O2 -1.033 -0.435 0.000
O3 1.163 0.104 0.000
H4 -0.373 1.455 0.000
H5 -0.666 -1.336 0.000

Atom - Atom Distances (Å)
  C1 O2 O3 H4 H5
C11.34221.20521.09881.8794
O21.34222.26082.00290.9720
O31.20522.26082.04522.3276
H41.09882.00292.04522.8065
H51.87940.97202.32762.8065

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 107.534 O2 C1 O3 125.030
O2 C1 H4 109.874 O3 C1 H4 125.096
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.303      
2 O -0.392      
3 O -0.425      
4 H 0.149      
5 H 0.365      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.513 -0.323 0.000 1.548
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.557 -0.006 0.000
y -0.006 -12.677 0.000
z 0.000 0.000 -17.122
Traceless
 xyz
x -7.657 -0.006 0.000
y -0.006 7.163 0.000
z 0.000 0.000 0.494
Polar
3z2-r20.989
x2-y2-9.880
xy-0.006
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.839 0.064 0.001
y 0.064 3.140 0.000
z 0.001 0.000 1.883


<r2> (average value of r2) Å2
<r2> 37.404
(<r2>)1/2 6.116

Conformer 2 (CS)

Jump to S1C1
Energy calculated at B3PW91/6-31+G**
 hartrees
Energy at 0K-189.692155
Energy at 298.15K 
HF Energy-189.692155
Nuclear repulsion energy69.889751
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 B3PW91/6-31+G**
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' 3829 3676 61.78      
2 A' 2997 2878 83.65      
3 A' 1887 1812 324.35      
4 A' 1426 1369 1.18      
5 A' 1275 1224 346.28      
6 A' 1124 1080 27.02      
7 A' 657 631 9.81      
8 A" 1034 993 0.00      
9 A" 536 514 103.55      

Unscaled Zero Point Vibrational Energy (zpe) 7382.9 cm-1
Scaled (by 0.9601) Zero Point Vibrational Energy (zpe) 7088.3 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 B3PW91/6-31+G**
ABC
2.89450 0.38904 0.34295

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-31+G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.386 0.000
O2 -0.900 -0.620 0.000
O3 1.182 0.189 0.000
H4 -0.456 1.393 0.000
H5 -1.798 -0.262 0.000

Atom - Atom Distances (Å)
  C1 O2 O3 H4 H5
C11.34941.19791.10611.9114
O21.34942.23352.06150.9669
O31.19792.23352.03273.0141
H41.10612.06152.03272.1312
H51.91140.96693.01412.1312

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 110.126 O2 C1 O3 122.408
O2 C1 H4 113.815 O3 C1 H4 123.777
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.297      
2 O -0.377      
3 O -0.396      
4 H 0.126      
5 H 0.350      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -3.789 1.712 0.000 4.158
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -15.830 -1.315 0.000
y -1.315 -17.611 0.000
z 0.000 0.000 -17.134
Traceless
 xyz
x 1.543 -1.315 0.000
y -1.315 -1.129 0.000
z 0.000 0.000 -0.413
Polar
3z2-r2-0.827
x2-y21.781
xy-1.315
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.295 0.108 0.000
y 0.108 2.902 0.000
z 0.000 0.000 1.896


<r2> (average value of r2) Å2
<r2> 37.886
(<r2>)1/2 6.155