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

using model chemistry: PBEPBEultrafine_cp_opt/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 PBEPBEultrafine_cp_opt/6-31+G**
 hartrees
Energy at 0K-265.941195
Energy at 298.15K-265.946140
Nuclear repulsion energy8.970246
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 PBEPBEultrafine_cp_opt/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 3783 3740 79.17      
2 A 3486 3446 330.83      
3 A 3088 3052 639.76      
4 A 3006 2972 157.01      
5 A 1718 1698 312.22      
6 A 1574 1556 146.34      
7 A 1417 1400 4.11      
8 A 1335 1320 13.23      
9 A 1191 1177 194.79      
10 A 1027 1015 41.86      
11 A 943 932 98.95      
12 A 687 679 113.92      
13 A 641 633 155.68      
14 A 385 381 90.71      
15 A 299 295 131.61      
16 A 222 219 42.29      
17 A 201 198 32.38      
18 A 184 182 6.95      

Unscaled Zero Point Vibrational Energy (zpe) 12592.3 cm-1
Scaled (by 0.9886) Zero Point Vibrational Energy (zpe) 12448.8 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 PBEPBEultrafine_cp_opt/6-31+G**
ABC
0.38426 0.16974 0.11861

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.433 0.956 -0.005
O2 -0.561 1.145 0.005
O3 1.875 -0.005 -0.093
C4 -1.194 -0.032 0.010
O5 -0.660 -1.141 0.003
H6 -2.293 0.110 0.021
H7 2.509 -0.076 0.641
H8 1.282 -0.793 -0.038

Atom - Atom Distances (Å)
  H1 O2 O3 C4 O5 H6 H7 H8
H11.01141.73481.90402.36472.85432.40621.9448
O21.01142.69461.33642.28772.01793.36352.6742
O31.73482.69463.07102.77904.17050.97300.9883
C41.90401.33643.07101.23131.10743.75682.5910
O52.36472.28772.77901.23132.05703.40291.9725
H62.85432.01794.17051.10742.05704.84483.6872
H72.40623.36350.97303.75683.40294.84481.5757
H81.94482.67420.98832.59101.97253.68721.5757

picture of Formic acid water dimer state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H1 O2 C4 107.581 H1 O3 H7 122.902
H1 O3 H8 86.592 O2 H1 O3 156.945
O2 C4 O5 125.932 O2 C4 H6 110.981
O5 C4 H6 123.087 H7 O3 H8 106.908
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine_cp_opt/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.000      
2 O 0.000      
3 O -0.712      
4 C 0.000      
5 O 0.000      
6 H 0.000      
7 H 0.356      
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
  0.652 0.195 1.393 1.551
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -18.601 -1.455 3.955
y -1.455 -28.480 -0.087
z 3.955 -0.087 -24.023
Traceless
 xyz
x 7.651 -1.455 3.955
y -1.455 -7.169 -0.087
z 3.955 -0.087 -0.483
Polar
3z2-r2-0.966
x2-y29.880
xy-1.455
xz3.955
yz-0.087


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.165 0.066 0.041
y 0.066 1.090 0.053
z 0.041 0.053 1.071


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