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 CHOCOOH (oxo acetic acid)

using model chemistry: PBEPBE/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at PBEPBE/6-311G*
 hartrees
Energy at 0K-302.834902
Energy at 298.15K-302.837987
HF Energy-302.834902
Nuclear repulsion energy162.191848
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 PBEPBE/6-311G*
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' 3452 3416 59.52      
2 A' 2914 2884 67.46      
3 A' 1800 1781 172.45      
4 A' 1736 1718 78.45      
5 A' 1352 1338 347.63      
6 A' 1306 1293 7.90      
7 A' 1170 1157 0.12      
8 A' 853 844 45.16      
9 A' 670 663 12.50      
10 A' 481 476 4.37      
11 A' 283 280 34.24      
12 A" 965 955 2.57      
13 A" 720 712 94.88      
14 A" 550 545 22.83      
15 A" 172 170 22.20      

Unscaled Zero Point Vibrational Energy (zpe) 9211.7 cm-1
Scaled (by 0.9896) Zero Point Vibrational Energy (zpe) 9115.9 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 PBEPBE/6-311G*
ABC
0.36470 0.15142 0.10699

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/6-311G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.754 -0.752 0.000
C2 0.000 0.590 0.000
O3 -0.153 -1.809 0.000
O4 -0.571 1.656 0.000
O5 1.336 0.427 0.000
H6 -1.865 -0.675 0.000
H7 1.497 -0.546 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 O4 O5 H6 H7
C11.53931.21582.41482.39961.11352.2606
C21.53932.40411.20931.34572.25291.8798
O31.21582.40413.49022.68692.05342.0781
O42.41481.20933.49022.26862.66513.0216
O52.39961.34572.68692.26863.38480.9872
H61.11352.25292.05342.66513.38483.3644
H72.26061.87982.07813.02160.98723.3644

picture of oxo acetic acid state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 O4 122.480 C1 C2 O5 112.382
C2 C1 O3 121.072 C2 C1 H6 115.327
C2 O5 H7 106.358 O3 C1 H6 123.602
O4 C2 O5 125.138
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.011      
2 C 0.332      
3 O -0.235      
4 O -0.262      
5 O -0.431      
6 H 0.208      
7 H 0.398      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.292 -1.942 0.000 1.963
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.760 -0.251 0.000
y -0.251 -35.485 0.000
z 0.000 0.000 -26.465
Traceless
 xyz
x 5.215 -0.251 0.000
y -0.251 -9.372 0.000
z 0.000 0.000 4.158
Polar
3z2-r28.315
x2-y29.725
xy-0.251
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.148 -0.663 0.000
y -0.663 5.585 0.000
z 0.000 0.000 2.307


<r2> (average value of r2) Å2
<r2> 100.282
(<r2>)1/2 10.014