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: M06-2X/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 M06-2X/6-31G*
 hartrees
Energy at 0K-152.469468
Energy at 298.15K-152.470309
HF Energy-152.469468
Nuclear repulsion energy58.077555
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 M06-2X/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' 3777 3577 113.92      
2 A' 3537 3350 91.28      
3 A' 2354 2229 110.65      
4 A' 1266 1198 110.68      
5 A' 1117 1058 89.73      
6 A' 674 638 42.93      
7 A' 400 379 13.47      
8 A" 593 562 52.06      
9 A" 464 439 7.11      

Unscaled Zero Point Vibrational Energy (zpe) 7090.6 cm-1
Scaled (by 0.947) Zero Point Vibrational Energy (zpe) 6714.8 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 M06-2X/6-31G*
ABC
21.96260 0.32365 0.31895

See section I.F.4 to change rotational constant units
Geometric Data calculated at M06-2X/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.124 0.000
C2 0.191 1.311 0.000
O3 -0.260 -1.164 0.000
H4 0.362 2.362 0.000
H5 0.573 -1.662 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5
C11.20231.31452.26681.8756
C21.20232.51621.06462.9975
O31.31452.51623.58070.9699
H42.26681.06463.58074.0294
H51.87562.99750.96994.0294

picture of ethynol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H4 179.915 C1 O3 H5 109.458
C2 C1 O3 177.731
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at M06-2X/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.149      
2 C -0.183      
3 O -0.640      
4 H 0.216      
5 H 0.458      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.636 -0.781 0.000 1.813
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.102 -2.270 0.000
y -2.270 -11.388 0.000
z 0.000 0.000 -18.240
Traceless
 xyz
x -2.288 -2.270 0.000
y -2.270 6.283 0.000
z 0.000 0.000 -3.995
Polar
3z2-r2-7.990
x2-y2-5.714
xy-2.270
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.729 0.336 0.000
y 0.336 5.234 0.000
z 0.000 0.000 1.439


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