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

using model chemistry: MP2/SDD

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/SDD
 hartrees
Energy at 0K-301.924062
Energy at 298.15K-301.927039
HF Energy-301.369313
Nuclear repulsion energy157.444774
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 MP2/SDD
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' 3574 3450 90.84      
2 A' 3111 3003 34.16      
3 A' 1646 1588 96.63      
4 A' 1532 1479 37.69      
5 A' 1354 1307 9.85      
6 A' 1268 1224 352.39      
7 A' 1156 1116 3.91      
8 A' 819 790 81.25      
9 A' 645 623 11.51      
10 A' 483 466 6.29      
11 A' 272 263 31.93      
12 A" 972 938 6.72      
13 A" 630 608 138.31      
14 A" 540 521 67.26      
15 A" 171 165 31.49      

Unscaled Zero Point Vibrational Energy (zpe) 9086.2 cm-1
Scaled (by 0.9653) Zero Point Vibrational Energy (zpe) 8770.9 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 MP2/SDD
ABC
0.34056 0.14369 0.10105

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/SDD

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.796 -0.745 0.000
C2 0.000 0.586 0.000
O3 -0.199 -1.864 0.000
O4 -0.560 1.706 0.000
O5 1.386 0.424 0.000
H6 -1.894 -0.640 0.000
H7 1.647 -0.533 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 O4 O5 H6 H7
C11.55031.26932.46232.47561.10272.4524
C21.55032.45801.25271.39572.25571.9907
O31.26932.45803.58892.78332.09162.2757
O42.46231.25273.58892.33062.69883.1436
O52.47561.39572.78332.33063.44840.9913
H61.10272.25572.09162.69883.44843.5425
H72.45241.99072.27573.14360.99133.5425

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 122.558 C1 C2 O5 114.246
C2 C1 O3 120.998 C2 C1 H6 115.440
C2 O5 H7 111.900 O3 C1 H6 123.563
O4 C2 O5 123.197
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability