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All results from a given calculation for HCCOH (ethynol)

using model chemistry: PBEPBE/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 PBEPBE/cc-pVTZ
 hartrees
Energy at 0K-152.423094
Energy at 298.15K-152.423739
Nuclear repulsion energy57.933408
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/cc-pVTZ
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' 3656 3630 84.44      
2 A' 3421 3397 91.49      
3 A' 2222 2207 136.64      
4 A' 1219 1210 76.44      
5 A' 1062 1055 92.90      
6 A' 595 591 49.71      
7 A' 373 371 9.72      
8 A" 504 500 52.14      
9 A" 380 378 14.27      

Unscaled Zero Point Vibrational Energy (zpe) 6715.9 cm-1
Scaled (by 0.9931) Zero Point Vibrational Energy (zpe) 6669.6 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/cc-pVTZ
ABC
22.00099 0.32216 0.31751

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.121 0.000
C2 0.007 1.330 0.000
O3 -0.106 -1.189 0.000
H4 0.027 2.397 0.000
H5 0.782 -1.589 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5
C11.20911.31362.27661.8802
C21.20912.52081.06763.0201
O31.31362.52083.58820.9744
H42.27661.06763.58824.0570
H51.88023.02010.97444.0570

picture of ethynol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H4 179.188 C1 O3 H5 109.638
C2 C1 O3 175.677
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.084      
2 C -0.286      
3 O -0.170      
4 H 0.142      
5 H 0.231      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.480 -0.917 0.000 1.741
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.017 -2.754 0.000
y -2.754 -12.363 0.000
z 0.000 0.000 -18.780
Traceless
 xyz
x -1.446 -2.754 0.000
y -2.754 5.535 0.000
z 0.000 0.000 -4.090
Polar
3z2-r2-8.180
x2-y2-4.654
xy-2.754
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.637 -0.177 0.000
y -0.177 6.019 0.000
z 0.000 0.000 2.474


<r2> (average value of r2) Å2
<r2> 40.999
(<r2>)1/2 6.403