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All results from a given calculation for CH3CCH (propyne)

using model chemistry: wB97X-D/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 wB97X-D/3-21G*
 hartrees
Energy at 0K-115.974602
Energy at 298.15K 
HF Energy-115.974602
Nuclear repulsion energy58.667864
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/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 3513 3330 59.85 27.55 0.18 0.31
2 A1 3078 2917 8.13 147.40 0.00 0.01
3 A1 2280 2161 1.51 69.29 0.33 0.50
4 A1 1481 1404 4.46 24.57 0.56 0.72
5 A1 935 886 1.41 2.72 0.21 0.35
6 E 3149 2984 5.54 80.67 0.75 0.86
6 E 3149 2984 5.56 80.68 0.75 0.86
7 E 1555 1473 11.41 24.35 0.75 0.86
7 E 1555 1473 11.40 24.36 0.75 0.86
8 E 1115 1057 6.94 0.12 0.75 0.86
8 E 1115 1057 6.93 0.12 0.75 0.86
9 E 758 719 54.75 1.90 0.75 0.86
9 E 758 718 54.75 1.90 0.75 0.86
10 E 364 345 13.38 10.99 0.75 0.86
10 E 364 345 13.38 10.98 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12583.8 cm-1
Scaled (by 0.9478) Zero Point Vibrational Energy (zpe) 11926.9 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/3-21G*
ABC
5.30274 0.28511 0.28511

See section I.F.4 to change rotational constant units
Geometric Data calculated at wB97X-D/3-21G*

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.243
C2 0.000 0.000 0.220
C3 0.000 0.000 1.423
H4 0.000 0.000 2.485
H5 0.000 1.025 -1.628
H6 0.888 -0.513 -1.628
H7 -0.888 -0.513 -1.628

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7
C11.46312.66663.72881.09521.09521.0952
C21.46311.20352.26562.11332.11332.1133
C32.66661.20351.06223.21903.21903.2190
H43.72882.26561.06224.23944.23944.2394
H51.09522.11333.21904.23941.77611.7761
H61.09522.11333.21904.23941.77611.7761
H71.09522.11333.21904.23941.77611.7761

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 110.567
C2 C1 H6 110.567 C2 C1 H7 110.567
C2 C3 H4 180.000 H5 C1 H6 108.353
H5 C1 H7 108.353 H6 C1 H7 108.353
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at wB97X-D/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.710      
2 C 0.075      
3 C -0.409      
4 H 0.282      
5 H 0.254      
6 H 0.254      
7 H 0.254      


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 -0.757 0.757
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.367 0.000 0.000
y 0.000 -19.367 0.000
z 0.000 0.000 -13.315
Traceless
 xyz
x -3.026 0.000 0.000
y 0.000 -3.026 0.000
z 0.000 0.000 6.052
Polar
3z2-r212.104
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 2.272 0.000 0.000
y 0.000 2.272 0.000
z 0.000 0.000 6.180


<r2> (average value of r2) Å2
<r2> 49.839
(<r2>)1/2 7.060