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

using model chemistry: B1B95/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at B1B95/6-31G*
 hartrees
Energy at 0K-266.078997
Energy at 298.15K-266.083314
Nuclear repulsion energy118.169132
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 B1B95/6-31G*
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 3888 3690 76.47      
2 A 3749 3559 85.30      
3 A 3729 3540 70.16      
4 A 3169 3008 13.99      
5 A 1859 1765 353.07      
6 A 1740 1652 74.57      
7 A 1432 1360 4.38      
8 A 1353 1284 21.61      
9 A 1191 1131 214.63      
10 A 1096 1040 1.58      
11 A 727 690 163.01      
12 A 665 631 145.59      
13 A 629 597 247.69      
14 A 274 260 100.83      
15 A 218 207 110.50      
16 A 179 170 0.48      
17 A 127 121 15.75      
18 A 104 98 11.12      

Unscaled Zero Point Vibrational Energy (zpe) 13064.1 cm-1
Scaled (by 0.9493) Zero Point Vibrational Energy (zpe) 12401.8 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 B1B95/6-31G*
ABC
0.74472 0.09710 0.08656

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/6-31G*

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 -1.762 0.444 -0.150
O2 -2.378 -0.302 -0.090
O3 0.219 0.965 0.002
H4 -2.767 -0.208 0.787
C5 0.644 -0.165 -0.004
O6 1.936 -0.481 0.011
H7 0.014 -1.060 -0.023
H8 2.433 0.355 0.023

Atom - Atom Distances (Å)
  H1 O2 O3 H4 C5 O6 H7 H8
H10.96932.05381.52112.48503.81482.33004.1992
O20.96932.89090.96353.02544.31842.50964.8567
O32.05382.89093.30311.20702.24492.03542.2967
H41.52110.96353.30313.50154.77463.01945.2863
C52.48503.02541.20703.50151.33071.09431.8638
O63.81484.31842.24494.77461.33072.00740.9729
H72.33002.50962.03543.01941.09432.00742.8028
H84.19924.85672.29675.28631.86380.97292.8028

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 103.816 H1 O3 C5 95.794
O2 H1 O3 143.483 O3 C5 O6 124.335
O3 C5 H7 124.297 C5 O6 H8 106.986
O6 C5 H7 111.368
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.423      
2 O -0.827      
3 O -0.447      
4 H 0.395      
5 C 0.367      
6 O -0.532      
7 H 0.195      
8 H 0.425      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.848 0.457 1.434 2.384
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -21.115 0.745 -4.438
y 0.745 -25.213 -0.481
z -4.438 -0.481 -22.068
Traceless
 xyz
x 2.525 0.745 -4.438
y 0.745 -3.621 -0.481
z -4.438 -0.481 1.096
Polar
3z2-r22.192
x2-y24.097
xy0.745
xz-4.438
yz-0.481


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.360 -0.073 -0.201
y -0.073 3.414 0.017
z -0.201 0.017 2.095


<r2> (average value of r2) Å2
<r2> 121.390
(<r2>)1/2 11.018