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All results from a given calculation for CH3CCH (propyne)

using model chemistry: PBE1PBE/6-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A'
Energy calculated at PBE1PBE/6-31G
 hartrees
Energy at 0K-116.476246
Energy at 298.15K 
HF Energy-116.476246
Nuclear repulsion energy58.589750
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 PBE1PBE/6-31G
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 3531 3375 56.86 32.21 0.18 0.31
2 A1 3063 2928 17.55 186.13 0.01 0.02
3 A1 2261 2161 3.51 85.55 0.31 0.48
4 A1 1470 1405 1.97 27.82 0.54 0.70
5 A1 976 932 1.07 3.44 0.21 0.34
6 E 3144 3006 10.09 88.80 0.75 0.86
6 E 3144 3006 10.09 88.80 0.75 0.86
7 E 1526 1459 11.46 23.55 0.75 0.86
7 E 1526 1459 11.46 23.55 0.75 0.86
8 E 1098 1050 4.59 0.01 0.75 0.86
8 E 1098 1050 4.59 0.01 0.75 0.86
9 E 695 664 66.02 2.11 0.75 0.86
9 E 695 664 66.02 2.11 0.75 0.86
10 E 363 347 8.97 11.39 0.75 0.86
10 E 363 347 8.97 11.39 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12476.7 cm-1
Scaled (by 0.9559) Zero Point Vibrational Energy (zpe) 11926.4 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 PBE1PBE/6-31G
ABC
5.34842 0.28447 0.28447

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/6-31G

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.240
C2 0.000 0.000 0.215
C3 0.000 0.000 1.428
H4 0.000 0.000 2.492
H5 0.000 1.021 -1.637
H6 0.884 -0.511 -1.637
H7 -0.884 -0.511 -1.637

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7
C11.45522.66753.73201.09571.09571.0957
C21.45521.21242.27682.11542.11542.1154
C32.66751.21241.06453.23073.23073.2307
H43.73202.27681.06454.25394.25394.2539
H51.09572.11543.23074.25391.76851.7685
H61.09572.11543.23074.25391.76851.7685
H71.09572.11543.23074.25391.76851.7685

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 111.275
C2 C1 H6 111.275 C2 C1 H7 111.275
C2 C3 H4 180.000 H5 C1 H6 107.609
H5 C1 H7 107.609 H6 C1 H7 107.609
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.544      
2 C 0.113      
3 C -0.451      
4 H 0.266      
5 H 0.205      
6 H 0.205      
7 H 0.205      


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 -0.764 0.764
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.180 0.000 0.000
y 0.000 -19.180 0.000
z 0.000 0.000 -13.542
Traceless
 xyz
x -2.819 0.000 0.000
y 0.000 -2.819 0.000
z 0.000 0.000 5.639
Polar
3z2-r211.278
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 2.497 0.000 0.000
y 0.000 2.497 0.000
z 0.000 0.000 6.533


<r2> (average value of r2) Å2
<r2> 49.919
(<r2>)1/2 7.065