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All results from a given calculation for CH3CCH (propyne)

using model chemistry: HF/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 HF/Def2TZVPP
 hartrees
Energy at 0K-115.913136
Energy at 298.15K 
HF Energy-115.913136
Nuclear repulsion energy59.219298
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/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 3618 3279 63.68 20.25 0.25 0.40
2 A1 3180 2882 20.24 199.95 0.00 0.01
3 A1 2387 2163 5.58 126.08 0.18 0.31
4 A1 1536 1393 0.91 4.52 0.52 0.69
5 A1 973 882 2.15 6.49 0.10 0.19
6 E 3243 2939 12.85 70.76 0.75 0.86
6 E 3243 2939 12.85 70.76 0.75 0.86
7 E 1598 1448 7.85 7.08 0.75 0.86
7 E 1598 1448 7.85 7.08 0.75 0.86
8 E 1153 1045 0.02 0.27 0.75 0.86
8 E 1153 1045 0.02 0.27 0.75 0.86
9 E 809 733 54.73 5.87 0.75 0.86
9 E 809 733 54.73 5.87 0.75 0.86
10 E 392 356 13.40 7.60 0.75 0.86
10 E 392 356 13.40 7.60 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 13041.1 cm-1
Scaled (by 0.9064) Zero Point Vibrational Energy (zpe) 11820.4 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/Def2TZVPP
ABC
5.42574 0.28953 0.28953

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.238
C2 0.000 0.000 0.227
C3 0.000 0.000 1.409
H4 0.000 0.000 2.463
H5 0.000 1.014 -1.616
H6 0.878 -0.507 -1.616
H7 -0.878 -0.507 -1.616

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7
C11.46432.64623.70021.08191.08191.0819
C21.46431.18192.23602.10292.10292.1029
C32.64621.18191.05403.18973.18973.1897
H43.70022.23601.05404.20244.20244.2024
H51.08192.10293.18974.20241.75581.7558
H61.08192.10293.18974.20241.75581.7558
H71.08192.10293.18974.20241.75581.7558

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 110.455
C2 C1 H6 110.455 C2 C1 H7 110.455
C2 C3 H4 180.000 H5 C1 H6 108.470
H5 C1 H7 108.470 H6 C1 H7 108.470
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/Def2TZVPP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.250      
2 C -0.279      
3 C 0.057      
4 H 0.189      
5 H 0.094      
6 H 0.094      
7 H 0.094      


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 -0.776 0.776
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.858 0.000 0.000
y 0.000 -19.858 0.000
z 0.000 0.000 -13.905
Traceless
 xyz
x -2.976 0.000 0.000
y 0.000 -2.976 0.000
z 0.000 0.000 5.953
Polar
3z2-r211.906
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 3.618 0.000 0.000
y 0.000 3.618 0.000
z 0.000 0.000 6.910


<r2> (average value of r2) Å2
<r2> 49.546
(<r2>)1/2 7.039