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All results from a given calculation for HCCOH (ethynol)

using model chemistry: PBEPBE/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at PBEPBE/6-31+G**
 hartrees
Energy at 0K-152.371969
Energy at 298.15K-152.372548
Nuclear repulsion energy57.587043
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 PBEPBE/6-31+G**
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' 3670 3628 96.18      
2 A' 3438 3399 97.57      
3 A' 2220 2195 155.56      
4 A' 1191 1177 70.76      
5 A' 1067 1055 103.30      
6 A' 579 572 64.48      
7 A' 353 349 9.48      
8 A" 496 491 60.17      
9 A" 365 361 25.84      

Unscaled Zero Point Vibrational Energy (zpe) 6689.0 cm-1
Scaled (by 0.9886) Zero Point Vibrational Energy (zpe) 6612.7 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 PBEPBE/6-31+G**
ABC
21.94651 0.31809 0.31355

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.120 0.000
C2 -0.006 1.339 0.000
O3 -0.096 -1.196 0.000
H4 0.009 2.411 0.000
H5 0.796 -1.595 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5
C11.21981.31932.29141.8906
C21.21982.53721.07173.0421
O31.31932.53723.60870.9776
H42.29141.07173.60874.0828
H51.89063.04210.97764.0828

picture of ethynol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H4 178.976 C1 O3 H5 109.901
C2 C1 O3 175.548
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.252      
2 C 0.231      
3 O -0.553      
4 H 0.199      
5 H 0.375      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.659 -0.807 0.000 1.845
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.528 -0.163 0.000
y -0.163 6.374 0.000
z 0.000 0.000 2.472


<r2> (average value of r2) Å2
<r2> 41.597
(<r2>)1/2 6.450