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All results from a given calculation for HCCOH (ethynol)

using model chemistry: HF/cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at HF/cc-pVDZ
 hartrees
Energy at 0K-151.681223
Energy at 298.15K-151.682312
Nuclear repulsion energy58.692402
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 HF/cc-pVDZ
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' 4103 3725 182.48      
2 A' 3655 3318 106.82      
3 A' 2463 2236 142.63      
4 A' 1389 1261 121.98      
5 A' 1164 1057 88.31      
6 A' 787 715 46.83      
7 A' 473 429 14.25      
8 A" 687 624 71.70      
9 A" 537 488 1.32      

Unscaled Zero Point Vibrational Energy (zpe) 7628.7 cm-1
Scaled (by 0.908) Zero Point Vibrational Energy (zpe) 6926.8 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 HF/cc-pVDZ
ABC
22.79910 0.33004 0.32533

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.124 0.000
C2 0.254 1.286 0.000
O3 -0.311 -1.141 0.000
H4 0.476 2.324 0.000
H5 0.483 -1.662 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5
C11.18911.30262.25051.8504
C21.18912.49151.06152.9567
O31.30262.49153.55280.9492
H42.25051.06153.55283.9859
H51.85042.95670.94923.9859

picture of ethynol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H4 179.712 C1 O3 H5 109.515
C2 C1 O3 178.555
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.056      
2 C -0.066      
3 O -0.231      
4 H 0.053      
5 H 0.188      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.537 -0.859 0.000 1.761
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.699 -1.846 0.000
y -1.846 -11.515 0.000
z 0.000 0.000 -18.580
Traceless
 xyz
x -2.652 -1.846 0.000
y -1.846 6.625 0.000
z 0.000 0.000 -3.973
Polar
3z2-r2-7.946
x2-y2-6.185
xy-1.846
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.912 0.486 0.000
y 0.486 5.033 0.000
z 0.000 0.000 1.631


<r2> (average value of r2) Å2
<r2> 0.000
(<r2>)1/2 0.000