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All results from a given calculation for CH3CCH (propyne)

using model chemistry: B2PLYP/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A'
Energy calculated at B2PLYP/6-311G*
 hartrees
Energy at 0K-116.543614
Energy at 298.15K 
HF Energy-116.409517
Nuclear repulsion energy58.668670
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 B2PLYP/6-311G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 3487 3487 46.45 31.57 0.28 0.44
2 A1 3064 3064 18.89 180.30 0.01 0.01
3 A1 2196 2196 2.71 85.53 0.29 0.45
4 A1 1446 1446 0.00 15.16 0.57 0.72
5 A1 945 945 0.98 3.27 0.18 0.30
6 E 3132 3132 12.36 84.59 0.75 0.86
6 E 3132 3132 12.36 84.59 0.75 0.86
7 E 1516 1516 8.78 13.34 0.75 0.86
7 E 1516 1516 8.78 13.34 0.75 0.86
8 E 1071 1071 0.59 0.00 0.75 0.86
8 E 1071 1071 0.59 0.00 0.75 0.86
9 E 588 588 52.30 1.23 0.75 0.86
9 E 588 588 52.30 1.23 0.75 0.86
10 E 306 306 4.29 10.50 0.75 0.86
10 E 306 306 4.29 10.50 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12181.7 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 12181.7 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 B2PLYP/6-311G*
ABC
5.36361 0.28482 0.28482

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/6-311G*

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.242
C2 0.000 0.000 0.218
C3 0.000 0.000 1.425
H4 0.000 0.000 2.488
H5 0.000 1.020 -1.632
H6 0.883 -0.510 -1.632
H7 -0.883 -0.510 -1.632

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7
C11.46022.66753.73021.09161.09161.0916
C21.46021.20732.27012.11252.11252.1125
C32.66751.20731.06283.22293.22293.2229
H43.73022.27011.06284.24454.24454.2445
H51.09162.11253.22294.24451.76591.7659
H61.09162.11253.22294.24451.76591.7659
H71.09162.11253.22294.24451.76591.7659

picture of propyne state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 180.000 C2 C1 H5 110.929
C2 C1 H6 110.929 C2 C1 H7 110.929
C2 C3 H4 180.000 H5 C1 H6 107.975
H5 C1 H7 107.975 H6 C1 H7 107.975
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.756      
2 C 0.064      
3 C -0.293      
4 H 0.247      
5 H 0.246      
6 H 0.246      
7 H 0.246      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 -0.708 0.708
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.675 0.000 0.000
y 0.000 -19.675 0.000
z 0.000 0.000 -13.892
Traceless
 xyz
x -2.892 0.000 0.000
y 0.000 -2.892 0.000
z 0.000 0.000 5.783
Polar
3z2-r211.566
x2-y20.000
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.959 0.000 0.000
y 0.000 2.959 0.000
z 0.000 0.000 6.724


<r2> (average value of r2) Å2
<r2> 50.119
(<r2>)1/2 7.079