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/aug-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 B3LYP/aug-cc-pVDZ
 hartrees
Energy at 0K-152.564186
Energy at 298.15K-152.564837
Nuclear repulsion energy57.942018
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/aug-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' 3763 3652 110.02      
2 A' 3493 3390 102.49      
3 A' 2280 2213 156.16      
4 A' 1250 1213 88.63      
5 A' 1081 1049 87.09      
6 A' 595 578 52.15      
7 A' 357 346 9.39      
8 A" 510 495 57.76      
9 A" 393 382 11.14      

Unscaled Zero Point Vibrational Energy (zpe) 6860.8 cm-1
Scaled (by 0.9704) Zero Point Vibrational Energy (zpe) 6657.7 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/aug-cc-pVDZ
ABC
22.50561 0.32184 0.31730

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/aug-cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.121 0.000
C2 -0.022 1.330 0.000
O3 -0.081 -1.190 0.000
H4 -0.022 2.398 0.000
H5 0.805 -1.582 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5
C11.20961.31382.27741.8831
C21.20962.52131.06793.0271
O31.31382.52133.58900.9682
H42.27741.06793.58904.0648
H51.88313.02710.96824.0648

picture of ethynol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H4 178.930 C1 O3 H5 110.304
C2 C1 O3 175.405
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/aug-cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.223      
2 C 0.944      
3 O -0.306      
4 H -0.551      
5 H 0.136      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.497 -0.679 0.000 1.644
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.186 -2.941 0.000
y -2.941 -12.856 0.000
z 0.000 0.000 -19.080
Traceless
 xyz
x -1.218 -2.941 0.000
y -2.941 5.277 0.000
z 0.000 0.000 -4.059
Polar
3z2-r2-8.118
x2-y2-4.330
xy-2.941
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.313 -0.218 -0.000
y -0.218 6.289 -0.000
z -0.000 -0.000 3.230


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