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: B3LYP/6-311G*

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/6-311G*
 hartrees
Energy at 0K-152.577378
Energy at 298.15K-152.578125
Nuclear repulsion energy58.262364
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/6-311G*
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' 3740 3614 67.49      
2 A' 3483 3366 79.45      
3 A' 2288 2211 130.57      
4 A' 1271 1228 116.27      
5 A' 1087 1050 89.82      
6 A' 624 603 50.94      
7 A' 393 380 12.61      
8 A" 527 510 50.76      
9 A" 434 419 18.59      

Unscaled Zero Point Vibrational Energy (zpe) 6922.9 cm-1
Scaled (by 0.9663) Zero Point Vibrational Energy (zpe) 6689.6 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 B3LYP/6-311G*
ABC
22.69913 0.32555 0.32094

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-311G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.123 0.000
C2 0.079 1.319 0.000
O3 -0.165 -1.175 0.000
H4 0.161 2.378 0.000
H5 0.688 -1.630 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5
C11.19901.30872.26121.8830
C21.19902.50651.06223.0115
O31.30872.50653.56860.9666
H42.26121.06223.56864.0428
H51.88303.01150.96664.0428

picture of ethynol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H4 179.349 C1 O3 H5 110.808
C2 C1 O3 176.519
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.124      
2 C -0.250      
3 O -0.525      
4 H 0.234      
5 H 0.417      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.701 -0.852 0.000 1.902
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.220 -2.798 0.000
y -2.798 -11.956 0.000
z 0.000 0.000 -18.673
Traceless
 xyz
x -1.905 -2.798 0.000
y -2.798 5.990 0.000
z 0.000 0.000 -4.085
Polar
3z2-r2-8.169
x2-y2-5.264
xy-2.798
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.973 0.010 0.000
y 0.010 5.522 0.000
z 0.000 0.000 1.759


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