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

using model chemistry: B3PW91/cc-pVDZ

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/cc-pVDZ
 hartrees
Energy at 0K-189.701611
Energy at 298.15K-189.704343
HF Energy-189.701611
Nuclear repulsion energy70.170674
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/cc-pVDZ
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' 3713 3583 54.21      
2 A' 3052 2945 55.45      
3 A' 1862 1797 333.91      
4 A' 1396 1347 4.89      
5 A' 1318 1272 16.09      
6 A' 1151 1111 221.22      
7 A' 629 607 48.82      
8 A" 1051 1015 1.30      
9 A" 705 680 138.54      

Unscaled Zero Point Vibrational Energy (zpe) 7439.0 cm-1
Scaled (by 0.965) Zero Point Vibrational Energy (zpe) 7178.6 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/cc-pVDZ
ABC
2.58110 0.40278 0.34841

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.420 0.000
O2 -1.031 -0.438 0.000
O3 1.160 0.107 0.000
H4 -0.389 1.459 0.000
H5 -0.639 -1.331 0.000

Atom - Atom Distances (Å)
  C1 O2 O3 H4 H5
C11.34191.20151.10911.8648
O21.34192.25822.00300.9755
O31.20152.25822.05592.3036
H41.10912.00302.05592.8016
H51.86480.97552.30362.8016

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 106.079 O2 C1 O3 125.111
O2 C1 H4 109.247 O3 C1 H4 125.642
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.216      
2 O -0.176      
3 O -0.248      
4 H 0.044      
5 H 0.164      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.397 -0.409 0.000 1.456
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -21.259 -0.089 0.000
y -0.089 -12.601 0.000
z 0.000 0.000 -16.497
Traceless
 xyz
x -6.710 -0.089 0.000
y -0.089 6.277 0.000
z 0.000 0.000 0.433
Polar
3z2-r20.865
x2-y2-8.658
xy-0.089
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.067 0.041 0.000
y 0.041 2.896 -0.000
z 0.000 -0.000 1.370


<r2> (average value of r2) Å2
<r2> 36.907
(<r2>)1/2 6.075

Conformer 2 (CS)

Jump to S1C1
Energy calculated at B3PW91/cc-pVDZ
 hartrees
Energy at 0K-189.693669
Energy at 298.15K 
HF Energy-189.693669
Nuclear repulsion energy69.938655
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/cc-pVDZ
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' 3786 3654 54.46      
2 A' 2949 2846 101.31      
3 A' 1905 1838 283.60      
4 A' 1409 1359 1.55      
5 A' 1291 1246 323.44      
6 A' 1129 1090 21.85      
7 A' 662 639 9.73      
8 A" 1036 1000 0.52      
9 A" 535 516 84.53      

Unscaled Zero Point Vibrational Energy (zpe) 7351.0 cm-1
Scaled (by 0.965) Zero Point Vibrational Energy (zpe) 7093.7 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/cc-pVDZ
ABC
2.88531 0.39015 0.34368

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.383 0.000
O2 -0.897 -0.623 0.000
O3 1.180 0.192 0.000
H4 -0.470 1.396 0.000
H5 -1.790 -0.245 0.000

Atom - Atom Distances (Å)
  C1 O2 O3 H4 H5
C11.34831.19511.11671.8967
O21.34832.23172.06400.9693
O31.19512.23172.04223.0016
H41.11672.06402.04222.1057
H51.89670.96933.00162.1057

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 108.741 O2 C1 O3 122.550
O2 C1 H4 113.382 O3 C1 H4 124.068
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.205      
2 O -0.158      
3 O -0.218      
4 H 0.012      
5 H 0.159      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -3.497 1.424 0.000 3.775
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -15.170 -1.150 0.000
y -1.150 -17.008 0.000
z 0.000 0.000 -16.504
Traceless
 xyz
x 1.586 -1.150 0.000
y -1.150 -1.171 0.000
z 0.000 0.000 -0.415
Polar
3z2-r2-0.830
x2-y21.838
xy-1.150
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.672 0.066 0.000
y 0.066 2.408 0.000
z 0.000 0.000 1.365


<r2> (average value of r2) Å2
<r2> 37.431
(<r2>)1/2 6.118