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

using model chemistry: B3LYPultrafine_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 B3LYPultrafine_cp/6-31+G**
 hartrees
Energy at 0K-266.224366
Energy at 298.15K-266.217603
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 B3LYPultrafine/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 3895 3749 103.60      
2 A 3672 3535 200.63      
3 A 3341 3217 635.18      
4 A 3087 2972 74.57      
5 A 1777 1711 363.62      
6 A 1605 1546 158.67      
7 A 1449 1395 2.70      
8 A 1386 1334 18.27      
9 A 1223 1177 233.22      
10 A 1065 1025 12.61      
11 A 932 898 158.24      
12 A 695 669 46.29      
13 A 595 573 174.84      
14 A 380 366 87.45      
15 A 269 259 118.44      
16 A 222 213 22.95      
17 A 193 185 48.28      
18 A 172 165 15.00      

Unscaled Zero Point Vibrational Energy (zpe) 12978.5 cm-1
Scaled (by 0.9627) Zero Point Vibrational Energy (zpe) 12494.4 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 B3LYPultrafine/6-31+G**
ABC
0.39099 0.16648 0.11743

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYPultrafine/6-31+G**

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.409 0.969 -0.001
O2 -0.571 1.135 0.006
O3 1.886 -0.001 -0.085
C4 -1.204 -0.035 0.008
O5 -0.672 -1.132 0.004
H6 -2.293 0.106 0.014
H7 2.602 -0.069 0.559
H8 1.354 -0.816 -0.026

Atom - Atom Distances (Å)
  H1 O2 O3 C4 O5 H6 H7 H8
H10.99401.76941.89912.36212.83622.49032.0200
O20.99402.70881.32942.26872.00583.43892.7411
O31.76942.70883.09162.79834.18180.96480.9757
C41.89911.32943.09161.21921.09833.84562.6745
O52.36212.26872.79831.21922.03953.48622.0501
H62.83622.00584.18181.09832.03954.92843.7617
H72.49033.43890.96483.84563.48624.92841.5679
H82.02002.74110.97572.67452.05013.76171.5679

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 B3LYPultrafine/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.432      
2 O -0.442      
3 O -0.774      
4 C 0.369      
5 O -0.497      
6 H 0.132      
7 H 0.377      
8 H 0.404      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.830 0.155 1.277 1.531
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