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/Def2TZVPP

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/Def2TZVPP
 hartrees
Energy at 0K-302.890401
Energy at 298.15K-302.893452
HF Energy-302.890401
Nuclear repulsion energy162.357697
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/Def2TZVPP
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' 3489 3447 89.01      
2 A' 2910 2874 50.72      
3 A' 1781 1760 203.79      
4 A' 1729 1708 63.45      
5 A' 1328 1312 304.80      
6 A' 1300 1284 13.34      
7 A' 1172 1158 2.21      
8 A' 853 842 46.19      
9 A' 664 656 11.37      
10 A' 479 474 4.95      
11 A' 269 266 34.37      
12 A" 974 963 2.94      
13 A" 710 701 76.89      
14 A" 551 545 15.90      
15 A" 162 160 24.02      

Unscaled Zero Point Vibrational Energy (zpe) 9185.7 cm-1
Scaled (by 0.9879) Zero Point Vibrational Energy (zpe) 9074.5 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/Def2TZVPP
ABC
0.36494 0.15177 0.10719

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/Def2TZVPP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.740 -0.767 0.000
C2 0.000 0.589 0.000
O3 -0.146 -1.820 0.000
O4 -0.590 1.640 0.000
O5 1.330 0.461 0.000
H6 -1.848 -0.682 0.000
H7 1.538 -0.495 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 O4 O5 H6 H7
C11.54471.20922.41162.40691.11162.2945
C21.54472.41371.20541.33622.24311.8819
O31.20922.41373.48872.71742.04772.1435
O42.41161.20543.48872.25332.64103.0147
O52.40691.33622.71742.25333.37770.9784
H61.11162.24312.04772.64103.37773.3918
H72.29451.88192.14353.01470.97843.3918

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 122.066 C1 C2 O5 113.129
C2 C1 O3 121.969 C2 C1 H6 114.242
C2 O5 H7 107.785 O3 C1 H6 123.789
O4 C2 O5 124.805
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/Def2TZVPP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.096      
2 C 0.212      
3 O -0.213      
4 O -0.229      
5 O -0.182      
6 H 0.097      
7 H 0.218      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.256 -1.852 0.000 1.870
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.832 0.144 0.000
y 0.144 -35.831 0.000
z 0.000 0.000 -26.678
Traceless
 xyz
x 5.422 0.144 0.000
y 0.144 -9.576 0.000
z 0.000 0.000 4.154
Polar
3z2-r28.308
x2-y29.999
xy0.144
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.709 -0.586 0.000
y -0.586 6.345 0.000
z 0.000 0.000 3.066


<r2> (average value of r2) Å2
<r2> 100.257
(<r2>)1/2 10.013