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

using model chemistry: QCISD/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 QCISD/3-21G
 hartrees
Energy at 0K-300.335856
Energy at 298.15K-300.339043
HF Energy-299.770133
Nuclear repulsion energy160.119929
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 QCISD/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' 3449 3343 50.10      
2 A' 3055 2961 38.25      
3 A' 1802 1747 84.97      
4 A' 1643 1593 33.06      
5 A' 1371 1328 42.10      
6 A' 1343 1302 304.92      
7 A' 1169 1133 13.92      
8 A' 824 798 49.62      
9 A' 675 654 12.56      
10 A' 492 477 3.03      
11 A' 292 283 34.22      
12 A" 1020 989 6.33      
13 A" 669 649 123.57      
14 A" 580 562 44.63      
15 A" 223 216 17.04      

Unscaled Zero Point Vibrational Energy (zpe) 9303.3 cm-1
Scaled (by 0.9692) Zero Point Vibrational Energy (zpe) 9016.7 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 QCISD/3-21G
ABC
0.35488 0.14877 0.10482

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.793 -0.727 0.000
C2 0.000 0.592 0.000
O3 -0.193 -1.819 0.000
O4 -0.528 1.699 0.000
O5 1.362 0.374 0.000
H6 -1.884 -0.607 0.000
H7 1.514 -0.613 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 O4 O5 H6 H7
C11.53941.24612.44092.41981.09742.3098
C21.53942.41951.22651.37942.23341.9354
O31.24612.41953.53472.68872.08022.0905
O42.44091.22653.53472.30862.67563.0851
O52.41981.37942.68872.30863.39080.9985
H61.09742.23342.08022.67563.39083.3979
H72.30981.93542.09053.08510.99853.3979

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 123.494 C1 C2 O5 111.884
C2 C1 O3 120.230 C2 C1 H6 114.735
C2 O5 H7 107.879 O3 C1 H6 125.035
O4 C2 O5 124.622
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability