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All results from a given calculation for CH3CCH (propyne)

using model chemistry: wB97X-D/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 wB97X-D/6-31G
 hartrees
Energy at 0K-116.583443
Energy at 298.15K 
HF Energy-116.583443
Nuclear repulsion energy58.555475
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/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 3522 3522 52.56 31.20 0.18 0.31
2 A1 3065 3065 18.73 174.77 0.01 0.01
3 A1 2268 2268 2.87 78.63 0.32 0.48
4 A1 1479 1479 1.96 24.04 0.56 0.71
5 A1 961 961 1.52 3.80 0.22 0.36
6 E 3148 3148 11.96 87.24 0.75 0.86
6 E 3148 3148 11.97 87.25 0.75 0.86
7 E 1534 1534 11.52 23.92 0.75 0.86
7 E 1534 1534 11.50 23.93 0.75 0.86
8 E 1107 1107 4.21 0.01 0.75 0.86
8 E 1107 1107 4.21 0.01 0.75 0.86
9 E 717 717 66.08 2.37 0.75 0.86
9 E 717 717 66.08 2.37 0.75 0.86
10 E 365 365 9.74 11.87 0.75 0.86
10 E 365 365 9.74 11.86 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12518.0 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 12518.0 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/6-31G
ABC
5.33995 0.28382 0.28382

See section I.F.4 to change rotational constant units
Geometric Data calculated at wB97X-D/6-31G

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.244
C2 0.000 0.000 0.218
C3 0.000 0.000 1.428
H4 0.000 0.000 2.492
H5 0.000 1.022 -1.636
H6 0.885 -0.511 -1.636
H7 -0.885 -0.511 -1.636

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7
C11.46172.67173.73581.09471.09471.0947
C21.46171.21012.27412.11732.11732.1173
C32.67171.21011.06413.23043.23043.2304
H43.73582.27411.06414.25324.25324.2532
H51.09472.11733.23044.25321.76991.7699
H61.09472.11733.23044.25321.76991.7699
H71.09472.11733.23044.25321.76991.7699

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 111.027
C2 C1 H6 111.027 C2 C1 H7 111.027
C2 C3 H4 180.000 H5 C1 H6 107.872
H5 C1 H7 107.872 H6 C1 H7 107.872
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at wB97X-D/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.514      
2 C 0.117      
3 C -0.468      
4 H 0.271      
5 H 0.198      
6 H 0.198      
7 H 0.198      


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 -0.749 0.749
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.131 0.000 0.000
y 0.000 -19.131 0.000
z 0.000 0.000 -13.508
Traceless
 xyz
x -2.811 0.000 0.000
y 0.000 -2.811 0.000
z 0.000 0.000 5.623
Polar
3z2-r211.246
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 2.499 0.000 0.000
y 0.000 2.499 0.000
z 0.000 0.000 6.462


<r2> (average value of r2) Å2
<r2> 49.957
(<r2>)1/2 7.068