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

using model chemistry: PBEPBE_cp/aug-cc-pVTZ

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/aug-cc-pVTZ
 hartrees
Energy at 0K-266.038169
Energy at 298.15K-266.031646
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/aug-cc-pVTZ
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 3752 3727 66.40      
2 A 3429 3406 402.56      
3 A 3040 3020 601.00      
4 A 2963 2944 176.41      
5 A 1705 1694 282.98      
6 A 1587 1577 111.98      
7 A 1428 1418 4.27      
8 A 1335 1326 11.94      
9 A 1183 1175 185.93      
10 A 1029 1022 31.70      
11 A 954 947 67.67      
12 A 705 700 145.18      
13 A 663 659 69.43      
14 A 387 384 59.99      
15 A 318 316 93.83      
16 A 238 237 42.36      
17 A 203 202 26.93      
18 A 187 186 9.35      

Unscaled Zero Point Vibrational Energy (zpe) 12551.4 cm-1
Scaled (by 0.9935) Zero Point Vibrational Energy (zpe) 12469.8 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/aug-cc-pVTZ
ABC
0.38747 0.17233 0.12027

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/aug-cc-pVTZ

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.438 0.947 -0.005
O2 -0.553 1.141 0.005
O3 1.865 -0.008 -0.097
C4 -1.185 -0.032 0.010
O5 -0.654 -1.134 0.002
H6 -2.281 0.109 0.023
H7 2.450 -0.079 0.674
H8 1.241 -0.772 -0.035

Atom - Atom Distances (Å)
  H1 O2 O3 C4 O5 H6 H7 H8
H11.01021.71981.89552.35052.84602.35851.8972
O21.01022.67951.33232.27772.01313.31002.6228
O31.71982.67953.05182.76074.14980.97050.9879
C41.89551.33233.05181.22361.10573.69502.5363
O52.35052.27772.76071.22362.04823.34591.9293
H62.84602.01314.14981.10572.04824.77953.6311
H72.35853.31000.97053.69503.34594.77951.5633
H81.89722.62280.98792.53631.92933.63111.5633

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/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.236      
2 O -0.258      
3 O -0.332      
4 C -0.004      
5 O -0.479      
6 H 0.452      
7 H 0.145      
8 H 0.242      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.479 0.329 1.267 1.394
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