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All results from a given calculation for H2OHCOOH (Water formic acid dimer 2)

using model chemistry: B1B95/CEP-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at B1B95/CEP-31G
 hartrees
Energy at 0K-55.840999
Energy at 298.15K-55.845135
Nuclear repulsion energy68.550516
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 B1B95/CEP-31G
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 3901 3736 77.35      
2 A 3698 3541 34.70      
3 A 3675 3519 147.42      
4 A 3202 3066 8.07      
5 A 1690 1619 226.29      
6 A 1593 1525 265.12      
7 A 1378 1320 7.58      
8 A 1283 1228 22.00      
9 A 1088 1042 269.55      
10 A 1050 1006 17.36      
11 A 687 658 273.54      
12 A 598 572 52.20      
13 A 501 479 203.51      
14 A 477 457 282.61      
15 A 178 171 1.19      
16 A 141 135 227.65      
17 A 87 83 1.33      
18 A 79 76 26.40      

Unscaled Zero Point Vibrational Energy (zpe) 12653.4 cm-1
Scaled (by 0.9575) Zero Point Vibrational Energy (zpe) 12115.6 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 B1B95/CEP-31G
ABC
0.77439 0.09590 0.08533

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/CEP-31G

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 1.785 0.490 0.002
O2 2.326 -0.330 0.000
O3 -0.160 0.961 -0.002
H4 3.279 -0.127 0.013
C5 -0.645 -0.186 -0.005
O6 -1.992 -0.445 0.003
H7 -0.060 -1.115 -0.014
H8 -2.528 0.381 0.011

Atom - Atom Distances (Å)
  H1 O2 O3 H4 C5 O6 H7 H8
H10.98272.00171.61622.52303.89112.44564.3151
O20.98272.80170.97412.97474.31922.51154.9063
O32.00172.80173.60721.24612.30922.07862.4383
H41.61620.97413.60723.92445.27993.48155.8293
C52.52302.97471.24613.92441.37111.09761.9669
O63.89114.31922.30925.27991.37112.04470.9852
H72.44562.51152.07863.48151.09762.04472.8865
H84.31514.90632.43835.82931.96690.98522.8865

picture of Water formic acid dimer 2 state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H1 O2 H4 111.356 H1 O3 C5 99.296
O2 H1 O3 136.993 O3 C5 O6 123.778
O3 C5 H7 124.855 C5 O6 H8 112.144
O6 C5 H7 111.367
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/CEP-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.359      
2 O -0.708      
3 O -0.177      
4 H 0.335      
5 C -0.162      
6 O -0.283      
7 H 0.257      
8 H 0.379      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.617 1.135 0.034 1.292
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -14.165 -0.162 0.071
y -0.162 -26.778 0.029
z 0.071 0.029 -24.480
Traceless
 xyz
x 11.464 -0.162 0.071
y -0.162 -7.455 0.029
z 0.071 0.029 -4.009
Polar
3z2-r2-8.018
x2-y212.613
xy-0.162
xz0.071
yz0.029


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.847 0.249 0.000
y 0.249 3.438 0.009
z 0.000 0.009 1.502


<r2> (average value of r2) Å2
<r2> 0.000
(<r2>)1/2 0.000