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All results from a given calculation for CH3CCH (propyne)

using model chemistry: wB97X-D/STO-3G

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/STO-3G
 hartrees
Energy at 0K-115.193388
Energy at 298.15K 
HF Energy-115.193388
Nuclear repulsion energy58.266441
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/STO-3G
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 3720 3720 132.80 23.90 0.30 0.46
2 A1 3335 3335 0.19 62.31 0.01 0.01
3 A1 2467 2467 5.94 35.61 0.30 0.46
4 A1 1575 1575 0.65 15.40 0.63 0.77
5 A1 997 997 2.14 3.82 0.30 0.46
6 E 3497 3497 0.62 37.40 0.75 0.86
6 E 3497 3497 0.62 37.40 0.75 0.86
7 E 1667 1667 5.94 17.98 0.75 0.86
7 E 1667 1667 5.95 17.98 0.75 0.86
8 E 1157 1157 4.08 0.05 0.75 0.86
8 E 1157 1157 4.08 0.05 0.75 0.86
9 E 781 781 18.49 0.03 0.75 0.86
9 E 781 781 18.49 0.03 0.75 0.86
10 E 365 365 3.05 5.14 0.75 0.86
10 E 365 365 3.05 5.14 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 13512.8 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 13512.8 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 wB97X-D/STO-3G
ABC
5.23755 0.28053 0.28053

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.257
C2 0.000 0.000 0.231
C3 0.000 0.000 1.430
H4 0.000 0.000 2.507
H5 0.000 1.032 -1.644
H6 0.894 -0.516 -1.644
H7 -0.894 -0.516 -1.644

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7
C11.48792.68643.76421.10201.10201.1020
C21.48791.19852.27622.14012.14012.1401
C32.68641.19851.07783.24203.24203.2420
H43.76422.27621.07784.27754.27754.2775
H51.10202.14013.24204.27751.78711.7871
H61.10202.14013.24204.27751.78711.7871
H71.10202.14013.24204.27751.78711.7871

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 110.563
C2 C1 H6 110.563 C2 C1 H7 110.563
C2 C3 H4 180.000 H5 C1 H6 108.358
H5 C1 H7 108.358 H6 C1 H7 108.358
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at wB97X-D/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.231      
2 C -0.040      
3 C -0.146      
4 H 0.114      
5 H 0.101      
6 H 0.101      
7 H 0.101      


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 -0.557 0.557
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.574 0.000 0.000
y 0.000 -17.574 0.000
z 0.000 0.000 -13.506
Traceless
 xyz
x -2.034 0.000 0.000
y 0.000 -2.034 0.000
z 0.000 0.000 4.068
Polar
3z2-r28.137
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 1.112 0.000 0.000
y 0.000 1.113 -0.000
z 0.000 -0.000 4.015


<r2> (average value of r2) Å2
<r2> 49.777
(<r2>)1/2 7.055