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All results from a given calculation for HCCOH (ethynol)

using model chemistry: B1B95/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B1B95/6-31+G**
 hartrees
Energy at 0K-152.491791
Energy at 298.15K-152.492566
Nuclear repulsion energy58.128071
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 B1B95/6-31+G**
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' 3832 3666 127.66      
2 A' 3514 3362 99.42      
3 A' 2299 2199 163.76      
4 A' 1223 1170 85.19      
5 A' 1108 1059 107.32      
6 A' 639 612 61.67      
7 A' 395 378 12.93      
8 A" 541 517 74.85      
9 A" 446 426 9.53      

Unscaled Zero Point Vibrational Energy (zpe) 6998.3 cm-1
Scaled (by 0.9566) Zero Point Vibrational Energy (zpe) 6694.6 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 B1B95/6-31+G**
ABC
22.61743 0.32387 0.31930

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/6-31+G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.120 0.000
C2 0.079 1.324 0.000
O3 -0.165 -1.178 0.000
H4 0.160 2.385 0.000
H5 0.690 -1.626 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5
C11.20641.30882.27011.8779
C21.20642.51411.06373.0131
O31.30882.51413.57770.9655
H42.27011.06373.57774.0458
H51.87793.01310.96554.0458

picture of ethynol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H4 179.336 C1 O3 H5 110.407
C2 C1 O3 176.483
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.221      
2 C 0.213      
3 O -0.583      
4 H 0.210      
5 H 0.381      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.647 -0.785 0.000 1.824
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.382 -2.771 0.000
y -2.771 -12.213 0.000
z 0.000 0.000 -18.958
Traceless
 xyz
x -1.797 -2.771 0.000
y -2.771 5.957 0.000
z 0.000 0.000 -4.160
Polar
3z2-r2-8.320
x2-y2-5.169
xy-2.771
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.373 0.086 0.000
y 0.086 6.025 0.000
z 0.000 0.000 2.305


<r2> (average value of r2) Å2
<r2> 40.907
(<r2>)1/2 6.396