return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: HF/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 HF/6-31+G**
 hartrees
Energy at 0K-264.813706
Energy at 298.15K-264.817318
Counterpoise corrected energy-264.813206
CP Energy at 298.15K-264.816777
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy117.463785
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 HF/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 4264 3856 129.91      
2 A 4139 3743 25.80      
3 A 4112 3719 123.79      
4 A 3331 3012 10.01      
5 A 2001 1809 508.73      
6 A 1732 1566 157.15      
7 A 1539 1391 14.35      
8 A 1403 1268 17.76      
9 A 1255 1135 332.73      
10 A 1197 1082 0.19      
11 A 693 626 217.59      
12 A 690 624 55.18      
13 A 304 275 116.30      
14 A 266 241 156.54      
15 A 116 105 0.60      
16 A 100 91 206.84      
17 A 80 72 17.37      
18 A 55 50 0.32      

Unscaled Zero Point Vibrational Energy (zpe) 13638.9 cm-1
Scaled (by 0.9042) Zero Point Vibrational Energy (zpe) 12332.3 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 HF/6-31+G**
ABC
0.67158 0.09385 0.08235

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 2.022 0.556 0.000
O2 2.384 -0.316 0.000
O3 -0.319 0.944 -0.000
H4 3.323 -0.238 0.000
H5 -1.030 1.573 0.000
C6 -0.823 -0.286 -0.000
O7 -1.983 -0.522 0.000
H8 -0.031 -1.024 -0.000

Atom - Atom Distances (Å)
  H1 O2 O3 H4 H5 C6 O7 H8
H10.94482.37291.52483.21682.96704.14742.5910
O20.94482.98260.94273.90213.20714.37192.5171
O32.37292.98263.82960.94931.32972.21771.9892
H41.52480.94273.82964.71534.14685.31413.4459
H53.21683.90210.94934.71531.87132.30192.7829
C62.96703.20711.32974.14681.87131.18371.0820
O74.14744.37192.21775.31412.30191.18372.0152
H82.59102.51711.98923.44592.78291.08202.0152

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 107.773 H1 O3 H5 147.893
H1 O3 C6 102.857 O2 H1 O3 121.953
O3 C6 O7 123.742 O3 C6 H8 110.720
H5 O3 C6 109.251 O7 C6 H8 125.538
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.385      
2 O -0.758      
3 O -0.591      
4 H 0.383      
5 H 0.402      
6 C 0.549      
7 O -0.544      
8 H 0.174      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.648 2.598 0.001 3.710
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.805 -1.680 0.002
y -1.680 -21.185 0.001
z 0.002 0.001 -24.566
Traceless
 xyz
x 0.070 -1.680 0.002
y -1.680 2.501 0.001
z 0.002 0.001 -2.571
Polar
3z2-r2-5.142
x2-y2-1.620
xy-1.680
xz0.002
yz0.001


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.463 0.150 -0.000
y 0.150 3.550 0.000
z -0.000 0.000 2.463


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