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All results from a given calculation for CH3CCH (propyne)

using model chemistry: PBEPBE/Def2TZVPP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A'
Energy calculated at PBEPBE/Def2TZVPP
 hartrees
Energy at 0K-116.535846
Energy at 298.15K 
HF Energy-116.535846
Nuclear repulsion energy58.577726
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 PBEPBE/Def2TZVPP
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 3406 3364 59.99 31.26 0.21 0.34
2 A1 2966 2930 16.44 246.35 0.02 0.04
3 A1 2164 2138 11.54 146.63 0.22 0.36
4 A1 1360 1343 0.07 16.34 0.43 0.60
5 A1 939 928 0.07 3.45 0.05 0.10
6 E 3029 2993 5.49 82.79 0.75 0.86
6 E 3029 2993 5.49 82.79 0.75 0.86
7 E 1423 1406 8.56 9.05 0.75 0.86
7 E 1423 1406 8.56 9.05 0.75 0.86
8 E 1013 1001 0.56 0.08 0.75 0.86
8 E 1013 1001 0.56 0.08 0.75 0.86
9 E 620 613 50.16 2.74 0.75 0.86
9 E 620 613 50.16 2.75 0.75 0.86
10 E 334 329 8.86 6.49 0.75 0.86
10 E 334 329 8.86 6.47 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 11836.0 cm-1
Scaled (by 0.9879) Zero Point Vibrational Energy (zpe) 11692.8 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 PBEPBE/Def2TZVPP
ABC
5.29575 0.28491 0.28491

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/Def2TZVPP

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.239
C2 0.000 0.000 0.215
C3 0.000 0.000 1.426
H4 0.000 0.000 2.495
H5 0.000 1.026 -1.635
H6 0.889 -0.513 -1.635
H7 -0.889 -0.513 -1.635

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7
C11.45342.66463.73421.09981.09981.0998
C21.45341.21122.28082.11482.11482.1148
C32.66461.21121.06963.22793.22793.2279
H43.73422.28081.06964.25564.25564.2556
H51.09982.11483.22794.25561.77721.7772
H61.09982.11483.22794.25561.77721.7772
H71.09982.11483.22794.25561.77721.7772

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 111.096
C2 C1 H6 111.096 C2 C1 H7 111.096
C2 C3 H4 180.000 H5 C1 H6 107.799
H5 C1 H7 107.799 H6 C1 H7 107.799
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/Def2TZVPP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.266      
2 C -0.309      
3 C 0.031      
4 H 0.200      
5 H 0.114      
6 H 0.114      
7 H 0.114      


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 -0.871 0.871
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.736 0.000 0.000
y 0.000 -19.736 0.000
z 0.000 0.000 -14.135
Traceless
 xyz
x -2.800 0.000 0.000
y 0.000 -2.800 0.000
z 0.000 0.000 5.601
Polar
3z2-r211.202
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 3.843 0.000 0.000
y 0.000 3.843 0.000
z 0.000 0.000 7.765


<r2> (average value of r2) Å2
<r2> 50.245
(<r2>)1/2 7.088