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All results from a given calculation for HCCOH (ethynol)

using model chemistry: B3PW91/STO-3G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B3PW91/STO-3G
 hartrees
Energy at 0K-150.476456
Energy at 298.15K-150.477097
Nuclear repulsion energy56.756335
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 B3PW91/STO-3G
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' 3721 3293 9.63      
2 A' 3716 3289 169.26      
3 A' 2469 2185 15.57      
4 A' 1425 1261 44.19      
5 A' 1060 938 24.67      
6 A' 728 644 18.17      
7 A' 384 339 7.33      
8 A" 608 538 30.06      
9 A" 403 357 0.94      

Unscaled Zero Point Vibrational Energy (zpe) 7256.7 cm-1
Scaled (by 0.885) Zero Point Vibrational Energy (zpe) 6422.2 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 B3PW91/STO-3G
ABC
18.39093 0.31120 0.30603

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/STO-3G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.141 0.000
C2 -0.138 1.338 0.000
O3 0.008 -1.227 0.000
H4 -0.240 2.409 0.000
H5 1.005 -1.464 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5
C11.20441.36862.28021.8934
C21.20442.56921.07603.0253
O31.36862.56923.64461.0245
H42.28021.07603.64464.0676
H51.89343.02531.02454.0676

picture of ethynol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H4 178.882 C1 O3 H5 103.656
C2 C1 O3 173.754
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.012      
2 C -0.164      
3 O -0.197      
4 H 0.116      
5 H 0.234      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.467 -0.359 0.000 1.510
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -14.392 -2.538 0.000
y -2.538 -12.670 0.000
z 0.000 0.000 -16.242
Traceless
 xyz
x 0.065 -2.538 0.000
y -2.538 2.647 0.000
z 0.000 0.000 -2.712
Polar
3z2-r2-5.423
x2-y2-1.722
xy-2.538
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 0.906 -0.645 0.000
y -0.645 3.681 0.000
z 0.000 0.000 0.324


<r2> (average value of r2) Å2
<r2> 41.050
(<r2>)1/2 6.407