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: B3LYPultrafine/aug-cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B3LYPultrafine/aug-cc-pVTZ
 hartrees
Energy at 0K-152.607778
Energy at 298.15K-152.608571
HF Energy-152.607778
Nuclear repulsion energy58.318424
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 B3LYPultrafine/aug-cc-pVTZ
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' 3762 3639 111.60      
2 A' 3486 3373 99.62      
3 A' 2277 2203 161.06      
4 A' 1249 1208 84.03      
5 A' 1083 1048 98.96      
6 A' 650 629 48.20      
7 A' 398 385 12.58      
8 A" 548 530 65.14      
9 A" 438 424 1.94      

Unscaled Zero Point Vibrational Energy (zpe) 6944.8 cm-1
Scaled (by 0.9675) Zero Point Vibrational Energy (zpe) 6719.1 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 B3LYPultrafine/aug-cc-pVTZ
ABC
22.76760 0.32615 0.32154

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYPultrafine/aug-cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.129 0.000
C2 -0.367 1.268 0.000
O3 0.224 -1.161 0.000
H4 -0.763 2.251 0.000
H5 1.171 -1.347 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5
C11.19691.30872.25501.8838
C21.19692.49961.05953.0338
O31.30872.49963.55140.9643
H42.25501.05953.55144.0846
H51.88383.03380.96434.0846

picture of ethynol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H4 175.937 C1 O3 H5 111.032
C2 C1 O3 172.009
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYPultrafine/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.651      
2 C -0.995      
3 O -0.373      
4 H 0.501      
5 H 0.217      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.458 -0.764 0.000 1.646
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.358 -2.729 0.000
y -2.729 -12.604 0.000
z 0.000 0.000 -18.984
Traceless
 xyz
x -1.563 -2.729 0.000
y -2.729 5.567 0.000
z 0.000 0.000 -4.003
Polar
3z2-r2-8.006
x2-y2-4.753
xy-2.729
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.397 -0.073 0.000
y -0.073 6.209 0.000
z 0.000 0.000 3.324


<r2> (average value of r2) Å2
<r2> 40.784
(<r2>)1/2 6.386