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: M06-2X/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 M06-2X/6-31G**
 hartrees
Energy at 0K-265.795108
Energy at 298.15K-265.796882
HF Energy-265.795108
Nuclear repulsion energy144.641176
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 M06-2X/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' 3825 3635 109.64      
2 A' 3488 3315 55.08      
3 A' 2291 2178 80.51      
4 A' 1892 1798 366.50      
5 A' 1405 1336 148.18      
6 A' 1226 1166 337.91      
7 A' 846 804 38.43      
8 A' 714 679 40.79      
9 A' 613 583 5.47      
10 A' 541 515 27.84      
11 A' 200 190 4.84      
12 A" 790 751 76.60      
13 A" 752 715 19.37      
14 A" 623 592 96.81      
15 A" 274 261 6.95      

Unscaled Zero Point Vibrational Energy (zpe) 9740.0 cm-1
Scaled (by 0.9504) Zero Point Vibrational Energy (zpe) 9256.9 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 M06-2X/6-31G**
ABC
0.40653 0.13770 0.10286

See section I.F.4 to change rotational constant units
Geometric Data calculated at M06-2X/6-31G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.495 0.000
C2 -0.234 -0.942 0.000
C3 -0.469 -2.122 0.000
O4 1.310 0.781 0.000
O5 -0.871 1.325 0.000
H6 -0.680 -3.169 0.000
H7 1.381 1.748 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7
C11.45622.65891.34101.20283.72611.8650
C21.45621.20302.31362.35482.27053.1381
C32.65891.20303.40463.47031.06744.2898
O41.34102.31363.40462.24794.42230.9702
O51.20282.35483.47032.24794.49732.2914
H63.72612.27051.06744.42234.49735.3313
H71.86503.13814.28980.97022.29145.3313

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 177.989 C1 O4 H7 106.494
C2 C1 O4 111.545 C2 C1 O5 124.370
C2 C3 H6 179.836 O4 C1 O5 124.085
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at M06-2X/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.490      
2 C 0.307      
3 C -0.441      
4 O -0.497      
5 O -0.436      
6 H 0.220      
7 H 0.357      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.215 -1.048 0.000 1.605
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -29.683 6.421 0.000
y 6.421 -18.713 0.000
z 0.000 0.000 -27.569
Traceless
 xyz
x -6.542 6.421 0.000
y 6.421 9.913 0.000
z 0.000 0.000 -3.371
Polar
3z2-r2-6.743
x2-y2-10.970
xy6.421
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.918 0.638 0.000
y 0.638 7.776 0.000
z 0.000 0.000 2.183


<r2> (average value of r2) Å2
<r2> 105.463
(<r2>)1/2 10.270