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 HCCOH (ethynol)

using model chemistry: wB97X-D/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at wB97X-D/3-21G*
 hartrees
Energy at 0K-151.646401
Energy at 298.15K-151.647520
HF Energy-151.646401
Nuclear repulsion energy57.826044
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 wB97X-D/3-21G*
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' 3594 3406 65.63      
2 A' 3540 3355 96.04      
3 A' 2348 2226 80.07      
4 A' 1284 1217 110.97      
5 A' 1081 1025 122.12      
6 A' 835 792 55.40      
7 A' 491 465 27.52      
8 A" 747 708 92.26      
9 A" 538 510 1.22      

Unscaled Zero Point Vibrational Energy (zpe) 7228.5 cm-1
Scaled (by 0.9478) Zero Point Vibrational Energy (zpe) 6851.2 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 wB97X-D/3-21G*
ABC
21.97525 0.32113 0.31650

See section I.F.4 to change rotational constant units
Geometric Data calculated at wB97X-D/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.133 0.000
C2 0.088 1.330 0.000
O3 -0.160 -1.192 0.000
H4 0.040 2.387 0.000
H5 0.714 -1.632 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5
C11.19971.33482.25431.9041
C21.19972.53381.05853.0271
O31.33482.53383.58470.9787
H42.25431.05853.58474.0750
H51.90413.02710.97874.0750

picture of ethynol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H4 173.244 C1 O3 H5 109.820
C2 C1 O3 177.303
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at wB97X-D/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.084      
2 C -0.095      
3 O -0.671      
4 H 0.282      
5 H 0.400      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.784 -1.035 0.000 2.063
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.647 -2.263 0.000
y -2.263 -11.156 0.000
z 0.000 0.000 -18.268
Traceless
 xyz
x -2.935 -2.263 0.000
y -2.263 6.802 0.000
z 0.000 0.000 -3.867
Polar
3z2-r2-7.734
x2-y2-6.491
xy-2.263
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.369 0.528 0.000
y 0.528 5.046 0.000
z 0.000 0.000 0.932


<r2> (average value of r2) Å2
<r2> 40.891
(<r2>)1/2 6.395