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All results from a given calculation for CHOCOOH (oxo acetic acid)

using model chemistry: CISD/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at CISD/3-21G*
 hartrees
Energy at 0K-300.256074
Energy at 298.15K-300.259348
HF Energy-299.775260
Nuclear repulsion energy161.794176
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 CISD/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' 3622 3385 74.95      
2 A' 3170 2962 30.35      
3 A' 1901 1777 121.09      
4 A' 1769 1653 51.80      
5 A' 1419 1326 27.81      
6 A' 1373 1283 380.09      
7 A' 1232 1152 3.01      
8 A' 869 812 52.97      
9 A' 702 656 15.47      
10 A' 517 483 4.10      
11 A' 298 278 37.33      
12 A" 1077 1006 7.45      
13 A" 670 627 114.11      
14 A" 608 569 77.29      
15 A" 227 212 21.07      

Unscaled Zero Point Vibrational Energy (zpe) 9727.4 cm-1
Scaled (by 0.9344) Zero Point Vibrational Energy (zpe) 9089.3 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 CISD/3-21G*
ABC
0.36088 0.15198 0.10694

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.780 -0.729 0.000
C2 0.000 0.585 0.000
O3 -0.184 -1.802 0.000
O4 -0.537 1.673 0.000
O5 1.347 0.386 0.000
H6 -1.863 -0.614 0.000
H7 1.537 -0.582 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 O4 O5 H6 H7
C11.52811.22842.41372.40131.08862.3219
C21.52812.39471.21301.36122.21571.9299
O31.22842.39473.49322.67062.05692.1097
O42.41371.21303.49322.28122.64373.0636
O52.40131.36122.67062.28123.36180.9866
H61.08862.21572.05692.64373.36183.4000
H72.32191.92992.10973.06360.98663.4000

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 123.012 C1 C2 O5 112.294
C2 C1 O3 120.245 C2 C1 H6 114.683
C2 O5 H7 109.539 O3 C1 H6 125.072
O4 C2 O5 124.694
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability