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All results from a given calculation for HCOOHH2O (Formic acid water dimer)

using model chemistry: PBEPBE_cp/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_cp/6-31+G**
 hartrees
Energy at 0K-265.940291
Energy at 298.15K-265.933769
Nuclear repulsion energy 
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
1 A 3787 3744 81.17      
2 A 3481 3441 324.84      
3 A 3060 3025 606.61      
4 A 3003 2968 223.77      
5 A 1717 1697 312.47      
6 A 1573 1555 145.37      
7 A 1426 1410 5.07      
8 A 1337 1322 13.29      
9 A 1194 1181 193.51      
10 A 1032 1021 61.13      
11 A 959 948 84.82      
12 A 691 683 102.05      
13 A 644 637 141.78      
14 A 397 393 81.19      
15 A 315 311 112.92      
16 A 238 235 38.56      
17 A 207 204 31.59      
18 A 191 188 10.53      

Unscaled Zero Point Vibrational Energy (zpe) 12624.7 cm-1
Scaled (by 0.9886) Zero Point Vibrational Energy (zpe) 12480.8 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 PBEPBE/6-31+G**
ABC
0.38438 0.17263 0.12000

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 0.446 0.950 -0.006
O2 -0.549 1.145 0.005
O3 1.856 -0.008 -0.092
C4 -1.188 -0.028 0.010
O5 -0.658 -1.140 0.003
H6 -2.286 0.118 0.023
H7 2.502 -0.073 0.632
H8 1.275 -0.807 -0.035

Atom - Atom Distances (Å)
  H1 O2 O3 C4 O5 H6 H7 H8
H11.01311.70691.90382.36382.85542.38351.9432
O21.01312.66821.33592.28792.01843.34372.6716
O31.70692.66823.04502.75854.14460.97300.9890
C41.90381.33593.04501.23181.10753.74162.5834
O52.36382.28792.75851.23182.05673.39401.9622
H62.85542.01844.14461.10752.05674.82953.6791
H72.38353.34370.97303.74163.39404.82951.5772
H81.94322.67160.98902.58341.96223.67911.5772

picture of Formic acid water dimer state 1 conformation 1
More geometry information
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 0.418      
2 O -0.388      
3 O -0.764      
4 C 0.268      
5 O -0.454      
6 H 0.145      
7 H 0.378      
8 H 0.397      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.743 0.188 1.380 1.578
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


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


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