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All results from a given calculation for HCCOH (ethynol)

using model chemistry: HF/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at HF/6-31G(2df,p)
 hartrees
Energy at 0K-151.686116
Energy at 298.15K-151.687229
Nuclear repulsion energy59.047858
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 HF/6-31G(2df,p)
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' 4133 3742 160.17      
2 A' 3659 3313 98.27      
3 A' 2477 2243 128.41      
4 A' 1376 1246 121.11      
5 A' 1166 1056 84.34      
6 A' 793 718 48.96      
7 A' 488 442 13.95      
8 A" 693 627 71.89      
9 A" 554 502 0.55      

Unscaled Zero Point Vibrational Energy (zpe) 7669.5 cm-1
Scaled (by 0.9055) Zero Point Vibrational Energy (zpe) 6944.7 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 HF/6-31G(2df,p)
ABC
23.44993 0.33389 0.32920

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.126 0.000
C2 0.216 1.285 0.000
O3 -0.277 -1.142 0.000
H4 0.405 2.320 0.000
H5 0.516 -1.653 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5
C11.17831.29782.23091.8526
C21.17832.47571.05272.9529
O31.29782.47573.52830.9437
H42.23091.05273.52833.9747
H51.85262.95290.94373.9747

picture of ethynol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H4 179.786 C1 O3 H5 110.485
C2 C1 O3 178.230
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.273      
2 C -0.368      
3 O -0.516      
4 H 0.246      
5 H 0.366      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.503 -0.762 0.000 1.685
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.253 -1.985 0.000
y -1.985 -11.341 0.000
z 0.000 0.000 -18.274
Traceless
 xyz
x -2.446 -1.985 0.000
y -1.985 6.423 0.000
z 0.000 0.000 -3.976
Polar
3z2-r2-7.953
x2-y2-5.913
xy-1.985
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.091 0.346 0.000
y 0.346 4.961 0.000
z 0.000 0.000 1.881


<r2> (average value of r2) Å2
<r2> 39.619
(<r2>)1/2 6.294