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All results from a given calculation for CH3CCH (propyne)

using model chemistry: wB97X-D/cc-pVQZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A'
Energy calculated at wB97X-D/cc-pVQZ
 hartrees
Energy at 0K-116.661834
Energy at 298.15K 
HF Energy-116.661834
Nuclear repulsion energy58.985732
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 wB97X-D/cc-pVQZ
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 3477 3477 61.84 26.41 0.23 0.38
2 A1 3057 3057 14.13 220.53 0.01 0.02
3 A1 2253 2253 9.29 136.12 0.19 0.32
4 A1 1418 1418 0.04 8.66 0.45 0.62
5 A1 949 949 0.30 4.98 0.05 0.10
6 E 3130 3130 5.31 70.01 0.75 0.86
6 E 3130 3130 5.31 70.31 0.75 0.86
7 E 1484 1484 9.45 6.50 0.75 0.86
7 E 1484 1484 9.49 6.48 0.75 0.86
8 E 1060 1060 0.50 0.27 0.75 0.86
8 E 1060 1060 0.49 0.27 0.75 0.86
9 E 694 694 48.70 3.55 0.75 0.86
9 E 694 694 48.70 3.58 0.75 0.86
10 E 353 353 10.79 5.28 0.75 0.86
10 E 353 353 10.79 5.25 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12297.9 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 12297.9 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 wB97X-D/cc-pVQZ
ABC
5.36811 0.28824 0.28824

See section I.F.4 to change rotational constant units
Geometric Data calculated at wB97X-D/cc-pVQZ

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.236
C2 0.000 0.000 0.219
C3 0.000 0.000 1.415
H4 0.000 0.000 2.476
H5 0.000 1.019 -1.621
H6 0.883 -0.510 -1.621
H7 -0.883 -0.510 -1.621

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7
C11.45542.65093.71271.08931.08931.0893
C21.45541.19552.25732.10342.10342.1034
C32.65091.19551.06183.20213.20213.2021
H43.71272.25731.06184.22224.22224.2222
H51.08932.10343.20214.22221.76521.7652
H61.08932.10343.20214.22221.76521.7652
H71.08932.10343.20214.22221.76521.7652

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 110.681
C2 C1 H6 110.681 C2 C1 H7 110.681
C2 C3 H4 180.000 H5 C1 H6 108.235
H5 C1 H7 108.235 H6 C1 H7 108.235
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at wB97X-D/cc-pVQZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.020      
2 C -0.100      
3 C -0.157      
4 H 0.101      
5 H 0.046      
6 H 0.046      
7 H 0.046      


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 -0.828 0.828
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.527 0.000 0.000
y 0.000 -19.527 0.000
z 0.000 0.000 -13.857
Traceless
 xyz
x -2.835 0.000 0.000
y 0.000 -2.835 0.000
z 0.000 0.000 5.670
Polar
3z2-r211.340
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 3.932 0.000 0.000
y 0.000 3.932 -0.000
z 0.000 -0.000 7.356


<r2> (average value of r2) Å2
<r2> 49.611
(<r2>)1/2 7.044