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

using model chemistry: PBEPBEultrafine_cp_opt/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 PBEPBEultrafine_cp_opt/aug-cc-pVTZ
 hartrees
Energy at 0K-266.039145
Energy at 298.15K-266.044177
Nuclear repulsion energy8.986621
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/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 3714 67.07      
2 A 3430 3395 399.84      
3 A 3047 3016 605.05      
4 A 2964 2934 165.56      
5 A 1705 1688 283.39      
6 A 1587 1571 112.37      
7 A 1427 1412 4.27      
8 A 1334 1321 11.98      
9 A 1182 1170 186.49      
10 A 1028 1017 29.73      
11 A 951 941 70.31      
12 A 703 696 135.71      
13 A 660 654 77.67      
14 A 385 381 60.66      
15 A 316 313 94.44      
16 A 237 235 41.94      
17 A 202 200 26.64      
18 A 186 184 8.90      

Unscaled Zero Point Vibrational Energy (zpe) 12547.1 cm-1
Scaled (by 0.99) Zero Point Vibrational Energy (zpe) 12421.7 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/aug-cc-pVTZ
ABC
0.38740 0.17201 0.12010

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.436 0.949 -0.003
O2 -0.555 1.141 0.005
O3 1.867 -0.008 -0.097
C4 -1.186 -0.033 0.009
O5 -0.654 -1.135 0.003
H6 -2.282 0.107 0.021
H7 2.454 -0.080 0.672
H8 1.243 -0.771 -0.035

Atom - Atom Distances (Å)
  H1 O2 O3 C4 O5 H6 H7 H8
H11.01001.72311.89592.35142.84602.36361.9000
O21.01002.68231.33242.27782.01303.31552.6253
O31.72312.68233.05422.76274.15220.97050.9877
C41.89591.33243.05421.22351.10573.70012.5390
O52.35142.27782.76271.22352.04813.34971.9319
H62.84602.01304.15221.10572.04814.78493.6338
H72.36363.31550.97053.70013.34974.78491.5633
H81.90002.62530.98772.53901.93193.63381.5633

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 107.265 H1 O3 H7 120.069
H1 O3 H8 84.361 O2 H1 O3 157.073
O2 C4 O5 125.991 O2 C4 H6 110.964
O5 C4 H6 123.045 H7 O3 H8 105.934
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine_cp_opt/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.000      
2 O 0.000      
3 O -0.353      
4 C 0.000      
5 O 0.000      
6 H 0.000      
7 H 0.167      
8 H 0.186      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.482 0.328 1.264 1.392
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.108 -1.105 3.584
y -1.105 -28.161 -0.088
z 3.584 -0.088 -23.732
Traceless
 xyz
x 6.839 -1.105 3.584
y -1.105 -6.741 -0.088
z 3.584 -0.088 -0.098
Polar
3z2-r2-0.196
x2-y29.054
xy-1.105
xz3.584
yz-0.088


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.589 0.046 0.032
y 0.046 1.566 0.007
z 0.032 0.007 1.552


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