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

using model chemistry: LSDA/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 LSDA/6-31+G**
 hartrees
Energy at 0K-188.821889
Energy at 298.15K-188.824583
HF Energy-188.821889
Nuclear repulsion energy70.085022
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/6-31+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' 3607 3553 53.81      
2 A' 2998 2953 35.37      
3 A' 1815 1788 363.19      
4 A' 1335 1315 1.89      
5 A' 1271 1252 42.35      
6 A' 1121 1104 202.14      
7 A' 605 595 53.42      
8 A" 1005 990 5.58      
9 A" 702 692 153.12      

Unscaled Zero Point Vibrational Energy (zpe) 7229.3 cm-1
Scaled (by 0.985) Zero Point Vibrational Energy (zpe) 7120.8 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/6-31+G**
ABC
2.54814 0.40394 0.34867

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.422 0.000
O2 -1.034 -0.424 0.000
O3 1.162 0.090 0.000
H4 -0.367 1.470 0.000
H5 -0.654 -1.334 0.000

Atom - Atom Distances (Å)
  C1 O2 O3 H4 H5
C11.33591.20831.11051.8737
O21.33592.25522.00780.9860
O31.20832.25522.05982.3077
H41.11052.00782.05982.8184
H51.87370.98602.30772.8184

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 106.632 O2 C1 O3 124.769
O2 C1 H4 109.966 O3 C1 H4 125.265
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at LSDA/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.204      
2 O -0.342      
3 O -0.392      
4 H 0.164      
5 H 0.367      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.494 -0.383 0.000 1.543
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.664 0.114 0.000
y 0.114 -12.891 0.000
z 0.000 0.000 -17.399
Traceless
 xyz
x -7.519 0.114 0.000
y 0.114 7.140 0.000
z 0.000 0.000 0.379
Polar
3z2-r20.757
x2-y2-9.773
xy0.114
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.062 0.069 0.000
y 0.069 3.419 0.000
z 0.000 0.000 1.997


<r2> (average value of r2) Å2
<r2> 37.451
(<r2>)1/2 6.120

Conformer 2 (CS)

Jump to S1C1
Energy calculated at LSDA/6-31+G**
 hartrees
Energy at 0K-188.814320
Energy at 298.15K 
HF Energy-188.814320
Nuclear repulsion energy69.863635
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/6-31+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' 3683 3627 49.35      
2 A' 2890 2847 83.43      
3 A' 1864 1836 294.87      
4 A' 1362 1342 1.26      
5 A' 1239 1221 340.08      
6 A' 1102 1085 1.10      
7 A' 642 633 8.93      
8 A" 989 974 0.23      
9 A" 552 544 101.86      

Unscaled Zero Point Vibrational Energy (zpe) 7161.4 cm-1
Scaled (by 0.985) Zero Point Vibrational Energy (zpe) 7054.0 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 LSDA/6-31+G**
ABC
2.87172 0.39054 0.34379

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.384 0.000
O2 -0.900 -0.612 0.000
O3 1.183 0.179 0.000
H4 -0.455 1.406 0.000
H5 -1.808 -0.243 0.000

Atom - Atom Distances (Å)
  C1 O2 O3 H4 H5
C11.34211.20081.11871.9131
O21.34212.22852.06610.9795
O31.20082.22852.04653.0205
H41.11872.06612.04652.1327
H51.91310.97953.02052.1327

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 110.005 O2 C1 O3 122.315
O2 C1 H4 113.889 O3 C1 H4 123.797
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at LSDA/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.200      
2 O -0.337      
3 O -0.361      
4 H 0.140      
5 H 0.357      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -3.780 1.632 0.000 4.117
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -15.870 -1.214 0.000
y -1.214 -17.855 0.000
z 0.000 0.000 -17.417
Traceless
 xyz
x 1.766 -1.214 0.000
y -1.214 -1.211 0.000
z 0.000 0.000 -0.555
Polar
3z2-r2-1.109
x2-y21.985
xy-1.214
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.636 0.091 0.000
y 0.091 3.133 0.000
z 0.000 0.000 2.009


<r2> (average value of r2) Å2
<r2> 37.974
(<r2>)1/2 6.162