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/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/cc-pVDZ
 hartrees
Energy at 0K-152.549441
Energy at 298.15K-152.550216
Nuclear repulsion energy57.904541
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/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' 3728 3616 98.94      
2 A' 3502 3397 95.34      
3 A' 2293 2224 121.76      
4 A' 1266 1228 87.01      
5 A' 1089 1056 86.23      
6 A' 653 633 38.92      
7 A' 388 377 11.34      
8 A" 549 533 48.65      
9 A" 429 417 7.24      

Unscaled Zero Point Vibrational Energy (zpe) 6949.0 cm-1
Scaled (by 0.97) Zero Point Vibrational Energy (zpe) 6740.5 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/cc-pVDZ
ABC
21.72567 0.32177 0.31708

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.121 0.000
C2 0.154 1.321 0.000
O3 -0.230 -1.174 0.000
H4 0.292 2.382 0.000
H5 0.621 -1.643 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5
C11.21051.31442.28031.8696
C21.21052.52431.06983.0005
O31.31442.52433.59380.9721
H42.28031.06983.59384.0384
H51.86963.00050.97214.0384

picture of ethynol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H4 179.970 C1 O3 H5 108.779
C2 C1 O3 177.255
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.009      
2 C -0.036      
3 O -0.139      
4 H -0.011      
5 H 0.177      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.475 -0.995 0.000 1.779
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.152 -2.216 0.000
y -2.216 -11.793 0.000
z 0.000 0.000 -18.330
Traceless
 xyz
x -2.090 -2.216 0.000
y -2.216 5.947 0.000
z 0.000 0.000 -3.858
Polar
3z2-r2-7.715
x2-y2-5.358
xy-2.216
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.923 0.220 0.000
y 0.220 5.527 0.000
z 0.000 0.000 1.665


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