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: CCSD(T)=FULL/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at CCSD(T)=FULL/6-31G*
 hartrees
Energy at 0K-302.313591
Energy at 298.15K-302.316738
HF Energy-301.473583
Nuclear repulsion energy162.337110
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 CCSD(T)=FULL/6-31G*
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' 3611 3506        
2 A' 3065 2975        
3 A' 1877 1822        
4 A' 1772 1721        
5 A' 1428 1386        
6 A' 1366 1326        
7 A' 1251 1215        
8 A' 899 873        
9 A' 685 665        
10 A' 508 493        
11 A' 298 289        
12 A" 983 955        
13 A" 689 669        
14 A" 562 546        
15 A" 177 171        

Unscaled Zero Point Vibrational Energy (zpe) 9585.7 cm-1
Scaled (by 0.9707) Zero Point Vibrational Energy (zpe) 9304.9 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 CCSD(T)=FULL/6-31G*
ABC
0.36303 0.15256 0.10742

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)=FULL/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.756 -0.747 0.000
C2 0.000 0.581 0.000
O3 -0.147 -1.807 0.000
O4 -0.580 1.645 0.000
O5 1.336 0.436 0.000
H6 -1.857 -0.673 0.000
H7 1.519 -0.530 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 O4 O5 H6 H7
C11.52811.22252.39832.40271.10352.2852
C21.52812.39281.21161.34362.24061.8824
O31.22252.39283.47912.68872.05162.0992
O42.39831.21163.47912.26542.64633.0229
O52.40271.34362.68872.26543.37950.9834
H61.10352.24062.05162.64633.37953.3789
H72.28521.88242.09923.02290.98343.3789

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 121.763 C1 C2 O5 113.426
C2 C1 O3 120.501 C2 C1 H6 115.795
C2 O5 H7 106.964 O3 C1 H6 123.705
O4 C2 O5 124.812
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability