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All results from a given calculation for CH3CCH (propyne)

using model chemistry: PBE1PBE/cc-pVDZ

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/cc-pVDZ
 hartrees
Energy at 0K-116.508932
Energy at 298.15K 
HF Energy-116.508932
Nuclear repulsion energy58.553244
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/cc-pVDZ
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 3505 3370 68.22 30.79 0.25 0.40
2 A1 3058 2941 15.49 206.88 0.01 0.02
3 A1 2260 2173 6.74 108.35 0.31 0.47
4 A1 1386 1333 0.08 16.01 0.50 0.67
5 A1 973 935 0.17 3.70 0.16 0.28
6 E 3144 3023 4.23 91.94 0.75 0.86
6 E 3144 3023 4.23 91.95 0.75 0.86
7 E 1446 1390 9.05 14.47 0.75 0.86
7 E 1446 1390 9.05 14.47 0.75 0.86
8 E 1036 996 1.66 0.18 0.75 0.86
8 E 1036 996 1.66 0.18 0.75 0.86
9 E 666 640 41.22 0.87 0.75 0.86
9 E 666 640 41.22 0.87 0.75 0.86
10 E 348 334 7.66 8.81 0.75 0.86
10 E 348 334 7.66 8.81 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12229.4 cm-1
Scaled (by 0.9615) Zero Point Vibrational Energy (zpe) 11758.6 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/cc-pVDZ
ABC
5.27993 0.28479 0.28479

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/cc-pVDZ

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 0.214
C3 0.000 0.000 1.426
H4 0.000 0.000 2.498
H5 0.000 1.028 -1.634
H6 0.890 -0.514 -1.634
H7 -0.890 -0.514 -1.634

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7
C11.45382.66523.73751.10061.10061.1006
C21.45381.21142.28362.11452.11452.1145
C32.66521.21141.07223.22743.22743.2274
H43.73752.28361.07224.25764.25764.2576
H51.10062.11453.22744.25761.77991.7799
H61.10062.11453.22744.25761.77991.7799
H71.10062.11453.22744.25761.77991.7799

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 110.988
C2 C1 H6 110.988 C2 C1 H7 110.988
C2 C3 H4 180.000 H5 C1 H6 107.912
H5 C1 H7 107.912 H6 C1 H7 107.912
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.018      
2 C 0.157      
3 C -0.391      
4 H 0.003      
5 H 0.083      
6 H 0.083      
7 H 0.083      


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 -0.796 0.796
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.314 0.000 0.000
y 0.000 -19.314 0.000
z 0.000 0.000 -13.636
Traceless
 xyz
x -2.839 0.000 0.000
y 0.000 -2.839 0.000
z 0.000 0.000 5.678
Polar
3z2-r211.356
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 2.904 0.000 0.000
y 0.000 2.904 0.000
z 0.000 0.000 7.040


<r2> (average value of r2) Å2
<r2> 49.986
(<r2>)1/2 7.070