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: 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-300.339033
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 3315 50.10      
2 A' 3055 2936 38.25      
3 A' 1802 1732 84.97      
4 A' 1643 1579 33.06      
5 A' 1371 1317 42.10      
6 A' 1343 1291 304.92      
7 A' 1169 1124 13.92      
8 A' 824 792 49.62      
9 A' 675 648 12.56      
10 A' 492 473 3.03      
11 A' 292 281 34.22      
12 A" 1020 981 6.33      
13 A" 669 643 123.57      
14 A" 580 557 44.63      
15 A" 223 214 17.04      

Unscaled Zero Point Vibrational Energy (zpe) 9303.3 cm-1
Scaled (by 0.9611) Zero Point Vibrational Energy (zpe) 8941.4 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