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

using model chemistry: wB97X-D/cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at wB97X-D/cc-pVDZ
 hartrees
Energy at 0K-266.141178
Energy at 298.15K-266.146094
HF Energy-266.141178
Nuclear repulsion energy124.402812
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 wB97X-D/cc-pVDZ
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 3986 3797 112.32      
2 A 3762 3584 191.09      
3 A 3446 3282 643.31      
4 A 3119 2971 68.64      
5 A 1824 1738 397.09      
6 A 1625 1548 149.60      
7 A 1464 1394 2.37      
8 A 1409 1342 23.52      
9 A 1258 1199 237.83      
10 A 1068 1017 11.60      
11 A 944 899 166.72      
12 A 706 672 52.22      
13 A 597 569 192.51      
14 A 378 360 95.61      
15 A 277 264 124.56      
16 A 236 224 23.32      
17 A 190 181 25.37      
18 A 174 166 21.08      

Unscaled Zero Point Vibrational Energy (zpe) 13231.0 cm-1
Scaled (by 0.9526) Zero Point Vibrational Energy (zpe) 12603.8 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 wB97X-D/cc-pVDZ
ABC
0.39460 0.16729 0.11820

See section I.F.4 to change rotational constant units
Geometric Data calculated at wB97X-D/cc-pVDZ

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.382 0.975 0.008
O2 -0.595 1.126 0.007
O3 1.869 0.025 -0.081
C4 -1.193 -0.054 0.005
O5 -0.627 -1.128 0.011
H6 -2.284 0.054 0.001
H7 2.540 -0.099 0.594
H8 1.345 -0.792 -0.130

Atom - Atom Distances (Å)
  H1 O2 O3 C4 O5 H6 H7 H8
H10.98861.76611.88112.33292.82092.48022.0165
O20.98862.69961.32242.25452.00073.41612.7310
O31.76612.69963.06382.75124.15370.95990.9714
C41.88111.32243.06381.21461.09653.77912.6466
O52.33292.25452.75121.21462.03543.38102.0059
H62.82092.00074.15371.09652.03544.86263.7286
H72.48023.41610.95993.77913.38104.86261.5593
H82.01652.73100.97142.64662.00593.72861.5593

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 108.102 H1 O3 H7 128.501
H1 O3 H8 90.056 O2 H1 O3 156.048
O2 C4 O5 125.356 O2 C4 H6 111.266
O5 C4 H6 123.378 H7 O3 H8 107.677
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at wB97X-D/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.435      
2 O -0.449      
3 O -0.788      
4 C 0.368      
5 O -0.508      
6 H 0.146      
7 H 0.387      
8 H 0.409      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.765 0.180 1.318 1.534
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.099 -1.727 3.780
y -1.727 -28.179 -0.050
z 3.780 -0.050 -23.793
Traceless
 xyz
x 8.886 -1.727 3.780
y -1.727 -7.733 -0.050
z 3.780 -0.050 -1.154
Polar
3z2-r2-2.307
x2-y211.079
xy-1.727
xz3.780
yz-0.050


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.853 -0.188 0.079
y -0.188 4.618 0.026
z 0.079 0.026 2.877


<r2> (average value of r2) Å2
<r2> 93.804
(<r2>)1/2 9.685