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All results from a given calculation for CH3CCH (propyne)

using model chemistry: PBE1PBE/3-21G*

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/3-21G*
 hartrees
Energy at 0K-115.865893
Energy at 298.15K 
HF Energy-115.865893
Nuclear repulsion energy58.660372
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/3-21G*
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 3512 3371 57.80 28.72 0.18 0.31
2 A1 3063 2940 8.71 155.98 0.01 0.02
3 A1 2265 2174 2.11 74.91 0.33 0.50
4 A1 1468 1409 3.57 27.82 0.55 0.71
5 A1 944 906 1.10 2.39 0.20 0.34
6 E 3133 3007 5.61 81.31 0.75 0.86
6 E 3133 3007 5.61 81.31 0.75 0.86
7 E 1545 1483 10.69 23.93 0.75 0.86
7 E 1545 1483 10.69 23.93 0.75 0.86
8 E 1103 1058 6.69 0.14 0.75 0.86
8 E 1103 1058 6.69 0.14 0.75 0.86
9 E 738 708 53.82 1.88 0.75 0.86
9 E 738 708 53.82 1.88 0.75 0.86
10 E 362 347 12.99 10.67 0.75 0.86
10 E 362 347 12.99 10.67 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12506.6 cm-1
Scaled (by 0.9598) Zero Point Vibrational Energy (zpe) 12003.8 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 PBE1PBE/3-21G*
ABC
5.29637 0.28535 0.28535

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/3-21G*

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.241
C2 0.000 0.000 0.217
C3 0.000 0.000 1.424
H4 0.000 0.000 2.486
H5 0.000 1.026 -1.629
H6 0.889 -0.513 -1.629
H7 -0.889 -0.513 -1.629

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7
C11.45842.66483.72741.09681.09681.0968
C21.45841.20642.26902.11212.11212.1121
C32.66481.20641.06263.22043.22043.2204
H43.72742.26901.06264.24124.24124.2412
H51.09682.11213.22044.24121.77711.7771
H61.09682.11213.22044.24121.77711.7771
H71.09682.11213.22044.24121.77711.7771

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 110.703
C2 C1 H6 110.703 C2 C1 H7 110.703
C2 C3 H4 180.000 H5 C1 H6 108.212
H5 C1 H7 108.212 H6 C1 H7 108.212
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.731      
2 C 0.071      
3 C -0.394      
4 H 0.276      
5 H 0.259      
6 H 0.259      
7 H 0.259      


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 -0.763 0.763
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.446 0.000 0.000
y 0.000 -19.446 0.000
z 0.000 0.000 -13.353
Traceless
 xyz
x -3.046 0.000 0.000
y 0.000 -3.046 0.000
z 0.000 0.000 6.093
Polar
3z2-r212.186
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 2.283 0.000 0.000
y 0.000 2.283 0.000
z 0.000 0.000 6.273


<r2> (average value of r2) Å2
<r2> 49.864
(<r2>)1/2 7.061