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All results from a given calculation for H2OHCOOH (Water formic acid dimer 1)

using model chemistry: B1B95/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at B1B95/3-21G
 hartrees
Energy at 0K-266.080568
Energy at 298.15K-266.084483
Nuclear repulsion energy117.137960
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 B1B95/3-21G
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 3889 3721 58.12      
2 A 3770 3607 15.72      
3 A 3713 3552 55.21      
4 A 3130 2995 11.01      
5 A 1883 1801 314.41      
6 A 1722 1648 75.26      
7 A 1417 1356 11.43      
8 A 1303 1247 7.88      
9 A 1153 1103 261.14      
10 A 1078 1032 1.81      
11 A 702 672 160.05      
12 A 625 598 53.68      
13 A 470 450 258.36      
14 A 229 219 121.39      
15 A 160 153 83.14      
16 A 138 132 0.59      
17 A 112 107 8.50      
18 A 84 80 10.03      

Unscaled Zero Point Vibrational Energy (zpe) 12788.8 cm-1
Scaled (by 0.9567) Zero Point Vibrational Energy (zpe) 12235.1 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 B1B95/3-21G
ABC
0.64470 0.09637 0.08452

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/3-21G

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 1.880 0.497 -0.200
O2 2.387 -0.319 -0.090
O3 -0.267 0.954 0.009
H4 2.722 -0.263 0.813
H5 -1.017 1.576 0.011
C6 -0.796 -0.288 -0.001
O7 -1.974 -0.517 0.006
H8 0.018 -1.023 -0.017

Atom - Atom Distances (Å)
  H1 O2 O3 H4 H5 C6 O7 H8
H10.96702.20571.52063.09902.79583.99042.4106
O20.96702.94620.96523.89793.18464.36662.4729
O32.20572.94623.32670.97411.35022.25341.9977
H41.52060.96523.32674.24373.61124.77162.9292
H53.09903.89790.97414.24371.87742.30202.7976
C62.79583.18461.35023.61121.87741.20001.0963
O73.99044.36662.25344.77162.30201.20002.0546
H82.41062.47291.99772.92922.79761.09632.0546

picture of Water formic acid dimer 1 state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H1 O2 H4 103.809 H1 O3 H5 151.890
H1 O3 C6 100.919 O2 H1 O3 132.456
O3 C6 O7 124.062 O3 C6 H8 109.046
H5 O3 C6 106.634 O7 C6 H8 126.893
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.416      
2 O -0.805      
3 O -0.561      
4 H 0.397      
5 H 0.422      
6 C 0.349      
7 O -0.410      
8 H 0.192      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.748 2.372 1.377 2.842
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -29.059 -1.631 4.350
y -1.631 -20.705 -0.707
z 4.350 -0.707 -21.933
Traceless
 xyz
x -7.740 -1.631 4.350
y -1.631 4.791 -0.707
z 4.350 -0.707 2.948
Polar
3z2-r25.896
x2-y2-8.354
xy-1.631
xz4.350
yz-0.707


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.208 0.043 0.204
y 0.043 3.522 -0.024
z 0.204 -0.024 2.136


<r2> (average value of r2) Å2
<r2> 123.395
(<r2>)1/2 11.108