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 C3H2O2 (Propiolic acid)

using model chemistry: CCD/aug-cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at CCD/aug-cc-pVTZ
 hartrees
Energy at 0K-265.464104
Energy at 298.15K-265.465802
HF Energy-264.537038
Nuclear repulsion energy144.938649
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 CCD/aug-cc-pVTZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3825 3661 102.35      
2 A' 3481 3332 49.34      
3 A' 2250 2153 67.31      
4 A' 1867 1787 375.29      
5 A' 1399 1339 105.08      
6 A' 1222 1170 365.98      
7 A' 839 803 32.45      
8 A' 703 673 33.65      
9 A' 602 577 6.44      
10 A' 540 516 23.81      
11 A' 185 177 5.35      
12 A" 790 756 59.00      
13 A" 733 701 20.73      
14 A" 597 572 85.39      
15 A" 241 231 7.31      

Unscaled Zero Point Vibrational Energy (zpe) 9637.6 cm-1
Scaled (by 0.957) Zero Point Vibrational Energy (zpe) 9223.2 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 CCD/aug-cc-pVTZ
ABC
0.40788 0.13821 0.10323

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/aug-cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.495 0.000
C2 -0.239 -0.940 0.000
C3 -0.475 -2.117 0.000
O4 1.311 0.775 0.000
O5 -0.864 1.324 0.000
H6 -0.683 -3.159 0.000
H7 1.388 1.737 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7
C11.45502.65551.34081.19733.71801.8618
C21.45501.20092.31172.34872.26353.1320
C32.65551.20093.39943.46331.06264.2805
O41.34082.31173.39942.24374.41110.9647
O51.19732.34873.46332.24374.48692.2893
H63.71802.26351.06264.41114.48695.3160
H71.86183.13204.28050.96472.28935.3160

picture of Propiolic acid state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 178.111 C1 O4 H7 106.569
C2 C1 O4 111.485 C2 C1 O5 124.350
C2 C3 H6 179.985 O4 C1 O5 124.165
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability