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

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

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at PBEPBE/6-31+G**
 hartrees
Energy at 0K-265.932356
Energy at 298.15K-265.936161
Counterpoise corrected energy-265.931711
CP Energy at 298.15K-265.935506
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy116.379970
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 PBEPBE/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
18 A 3809 3766 91.68      
17 A 3609 3568 31.77      
16 A 3586 3545 276.95      
15 A 3037 3003 12.14      
14 A 1739 1719 349.52      
13 A 1583 1565 132.63      
12 A 1353 1338 3.21      
11 A 1271 1257 21.25      
10 A 1110 1098 227.95      
9 A 1015 1003 7.09      
8 A 693 685 153.12      
7 A 610 603 48.25      
6 A 503 497 109.48      
5 A 361 357 199.82      
4 A 173 171 7.25      
3 A 75 75 61.68      
2 A 57 56 24.08      
1 A 46 46 96.38      

Unscaled Zero Point Vibrational Energy (zpe) 12315.6 cm-1
Scaled (by 0.9886) Zero Point Vibrational Energy (zpe) 12175.2 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 PBEPBE/6-31+G**
ABC
0.86634 0.09078 0.08220

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 -1.749 0.396 -0.012
O2 -2.417 -0.322 -0.028
O3 0.163 0.898 -0.001
H4 -3.270 0.104 0.157
C5 0.698 -0.202 0.015
O6 2.032 -0.402 -0.002
H7 0.157 -1.166 0.045
H8 2.456 0.485 -0.030

Atom - Atom Distances (Å)
  H1 O2 O3 H4 C5 O6 H7 H8
H10.98161.97621.55842.51923.86392.46464.2059
O20.98162.85430.97143.11834.45012.70994.9401
O31.97622.85433.52701.22392.27702.06462.3307
H41.55840.97143.52703.98285.32863.65665.7422
C52.51923.11831.22393.98281.34861.10591.8881
O63.86394.45012.27705.32861.34862.02530.9839
H72.46462.70992.06463.65661.10592.02532.8319
H84.20594.94012.33075.74221.88810.98392.8319

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 105.872 H1 O3 C5 101.241
O2 H1 O3 147.662 O3 C5 O6 124.464
O3 C5 H7 124.721 C5 O6 H8 107.052
O6 C5 H7 110.816
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.371      
2 O -0.747      
3 O -0.427      
4 H 0.357      
5 C 0.247      
6 O -0.343      
7 H 0.184      
8 H 0.356      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.440 1.065 0.364 1.828
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -18.078 -0.991 -1.429
y -0.991 -25.915 -0.002
z -1.429 -0.002 -25.272
Traceless
 xyz
x 7.515 -0.991 -1.429
y -0.991 -4.240 -0.002
z -1.429 -0.002 -3.275
Polar
3z2-r2-6.551
x2-y27.837
xy-0.991
xz-1.429
yz-0.002


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.860 -0.294 -0.031
y -0.294 4.507 -0.040
z -0.031 -0.040 3.109


<r2> (average value of r2) Å2
<r2> 127.769
(<r2>)1/2 11.303