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

using model chemistry: MP2=FULL/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 MP2=FULL/3-21G
 hartrees
Energy at 0K-300.335278
Energy at 298.15K-300.338506
HF Energy-299.767907
Nuclear repulsion energy159.942617
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=FULL/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' 3426 3271 69.61      
2 A' 3104 2964 40.33      
3 A' 1744 1665 63.85      
4 A' 1570 1499 13.04      
5 A' 1381 1319 21.21      
6 A' 1341 1280 336.93      
7 A' 1169 1116 11.35      
8 A' 833 795 52.14      
9 A' 677 646 11.22      
10 A' 491 468 2.15      
11 A' 295 282 34.85      
12 A" 1040 993 5.80      
13 A" 707 675 128.37      
14 A" 589 563 33.31      
15 A" 230 220 16.06      

Unscaled Zero Point Vibrational Energy (zpe) 9299.1 cm-1
Scaled (by 0.9548) Zero Point Vibrational Energy (zpe) 8878.8 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=FULL/3-21G
ABC
0.35682 0.14815 0.10469

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.792 -0.720 0.000
C2 0.000 0.593 0.000
O3 -0.191 -1.822 0.000
O4 -0.524 1.711 0.000
O5 1.358 0.361 0.000
H6 -1.880 -0.602 0.000
H7 1.489 -0.631 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 O4 O5 H6 H7
C11.53391.25522.44602.40701.09382.2833
C21.53392.42311.23451.37802.22731.9279
O31.25522.42313.54892.67732.08322.0601
O42.44601.23453.54892.31632.68083.0883
O52.40701.37802.67732.31633.37801.0005
H61.09382.22732.08322.68083.37803.3691
H72.28331.92792.06013.08831.00053.3691

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 123.791 C1 C2 O5 111.394
C2 C1 O3 120.303 C2 C1 H6 114.878
C2 O5 H7 107.229 O3 C1 H6 124.819
O4 C2 O5 124.815
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability