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All results from a given calculation for HCCOH (ethynol)

using model chemistry: B3LYP/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 B3LYP/6-31G**
 hartrees
Energy at 0K-152.539051
Energy at 298.15K-152.539753
Nuclear repulsion energy57.996182
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 B3LYP/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' 3775 3627 79.74      
2 A' 3511 3373 86.89      
3 A' 2303 2213 109.50      
4 A' 1250 1201 97.00      
5 A' 1092 1049 88.79      
6 A' 630 605 41.62      
7 A' 372 358 10.39      
8 A" 532 511 42.09      
9 A" 406 390 14.77      

Unscaled Zero Point Vibrational Energy (zpe) 6935.8 cm-1
Scaled (by 0.9608) Zero Point Vibrational Energy (zpe) 6663.9 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 B3LYP/6-31G**
ABC
22.16138 0.32253 0.31790

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-31G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.123 0.000
C2 0.113 1.324 0.000
O3 -0.195 -1.178 0.000
H4 0.222 2.381 0.000
H5 0.659 -1.635 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5
C11.20591.31562.26901.8778
C21.20592.52051.06313.0088
O31.31562.52053.58350.9690
H42.26901.06313.58354.0400
H51.87783.00880.96904.0400

picture of ethynol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H4 179.495 C1 O3 H5 109.626
C2 C1 O3 176.859
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.144      
2 C -0.093      
3 O -0.536      
4 H 0.141      
5 H 0.345      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.589 -0.821 0.000 1.789
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -16.756 -2.489 0.000
y -2.489 -11.747 0.000
z 0.000 0.000 -18.083
Traceless
 xyz
x -1.841 -2.489 0.000
y -2.489 5.672 0.000
z 0.000 0.000 -3.831
Polar
3z2-r2-7.662
x2-y2-5.008
xy-2.489
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.740 0.104 0.000
y 0.104 5.395 0.000
z 0.000 0.000 1.463


<r2> (average value of r2) Å2
<r2> 40.611
(<r2>)1/2 6.373