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All results from a given calculation for HCCOH (ethynol)

using model chemistry: HF/SDD

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/SDD
 hartrees
Energy at 0K-151.627507
Energy at 298.15K-151.628606
Nuclear repulsion energy58.143941
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/SDD
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' 4044 3642 152.92      
2 A' 3703 3335 95.27      
3 A' 2436 2193 114.87      
4 A' 1317 1186 155.85      
5 A' 1106 996 110.23      
6 A' 839 756 73.09      
7 A' 468 421 24.53      
8 A" 764 688 110.61      
9 A" 521 469 0.04      

Unscaled Zero Point Vibrational Energy (zpe) 7599.4 cm-1
Scaled (by 0.9004) Zero Point Vibrational Energy (zpe) 6842.5 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 HF/SDD
ABC
25.12126 0.32249 0.31840

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/SDD

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.134 0.000
C2 0.133 1.320 0.000
O3 -0.204 -1.172 0.000
H4 0.251 2.364 0.000
H5 0.582 -1.712 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5
C11.19301.32232.24421.9363
C21.19302.51471.05123.0653
O31.32232.51473.56570.9539
H42.24421.05123.56574.0903
H51.93633.06530.95394.0903

picture of ethynol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H4 179.998 C1 O3 H5 115.622
C2 C1 O3 177.537
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/SDD Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.305      
2 C -0.445      
3 O -0.573      
4 H 0.271      
5 H 0.442      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.067 -0.387 0.000 2.103
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -18.069 -3.117 0.000
y -3.117 -11.965 0.000
z 0.000 0.000 -19.025
Traceless
 xyz
x -2.574 -3.117 0.000
y -3.117 6.582 0.000
z 0.000 0.000 -4.008
Polar
3z2-r2-8.016
x2-y2-6.104
xy-3.117
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.579 0.170 0.000
y 0.170 5.240 0.000
z 0.000 0.000 1.338


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