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: CCSD/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/6-31G*
 hartrees
Energy at 0K-265.168425
Energy at 298.15K-265.170024
HF Energy-264.425943
Nuclear repulsion energy143.916993
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/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' 3707 3500 81.51      
2 A' 3492 3297 39.45      
3 A' 2245 2120 76.23      
4 A' 1870 1766 317.51      
5 A' 1421 1342 91.36      
6 A' 1232 1164 371.28      
7 A' 841 794 32.06      
8 A' 631 596 42.83      
9 A' 599 566 3.97      
10 A' 536 506 28.43      
11 A' 193 182 3.85      
12 A" 773 730 84.86      
13 A" 643 607 2.87      
14 A" 616 582 113.20      
15 A" 244 231 4.62      

Unscaled Zero Point Vibrational Energy (zpe) 9521.1 cm-1
Scaled (by 0.9443) Zero Point Vibrational Energy (zpe) 8990.7 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/6-31G*
ABC
0.40081 0.13681 0.10199

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.495 0.000
C2 -0.233 -0.943 0.000
C3 -0.479 -2.129 0.000
O4 1.321 0.778 0.000
O5 -0.874 1.332 0.000
H6 -0.687 -3.178 0.000
H7 1.387 1.754 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7
C11.45682.66751.35081.21063.73711.8732
C21.45681.21132.31872.36392.28103.1462
C32.66751.21133.41903.48391.06974.3081
O41.35082.31873.41902.26434.43670.9784
O51.21062.36393.48392.26434.51442.3005
H63.73712.28101.06974.43674.51445.3508
H71.87323.14624.30810.97842.30055.3508

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 177.503 C1 O4 H7 105.965
C2 C1 O4 111.291 C2 C1 O5 124.546
C2 C3 H6 179.538 O4 C1 O5 124.163
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability