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All results from a given calculation for CH3CCH (propyne)

using model chemistry: TPSSh/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 TPSSh/STO-3G
 hartrees
Energy at 0K-115.253546
Energy at 298.15K 
HF Energy-115.253546
Nuclear repulsion energy58.092500
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 TPSSh/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 3685 3685 124.41 26.55 0.29 0.45
2 A1 3299 3299 0.38 69.78 0.01 0.02
3 A1 2417 2417 4.98 38.69 0.29 0.45
4 A1 1561 1561 2.18 18.96 0.61 0.75
5 A1 984 984 2.01 3.28 0.29 0.45
6 E 3453 3453 0.11 40.43 0.75 0.86
6 E 3453 3453 0.11 40.42 0.75 0.86
7 E 1661 1661 4.66 18.64 0.75 0.86
7 E 1661 1661 4.66 18.64 0.75 0.86
8 E 1145 1145 2.87 0.07 0.75 0.86
8 E 1145 1145 2.87 0.07 0.75 0.86
9 E 732 732 18.82 0.07 0.75 0.86
9 E 732 732 18.82 0.07 0.75 0.86
10 E 347 347 2.62 4.89 0.75 0.86
10 E 347 347 2.62 4.89 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 13310.5 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 13310.5 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 TPSSh/STO-3G
ABC
5.21059 0.27899 0.27899

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.259
C2 0.000 0.000 0.230
C3 0.000 0.000 1.434
H4 0.000 0.000 2.515
H5 0.000 1.034 -1.649
H6 0.896 -0.517 -1.649
H7 -0.896 -0.517 -1.649

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7
C11.48932.69373.77401.10551.10551.1055
C21.48931.20432.28472.14522.14522.1452
C32.69371.20431.08033.25263.25263.2526
H43.77402.28471.08034.29064.29064.2906
H51.10552.14523.25264.29061.79171.7917
H61.10552.14523.25264.29061.79171.7917
H71.10552.14523.25264.29061.79171.7917

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 110.658
C2 C1 H6 110.658 C2 C1 H7 110.658
C2 C3 H4 180.000 H5 C1 H6 108.259
H5 C1 H7 108.259 H6 C1 H7 108.259
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at TPSSh/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.209      
2 C -0.045      
3 C -0.139      
4 H 0.109      
5 H 0.095      
6 H 0.095      
7 H 0.095      


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 -0.568 0.568
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.134 0.000 0.000
y 0.000 1.134 0.000
z 0.000 0.000 4.120


<r2> (average value of r2) Å2
<r2> 50.031
(<r2>)1/2 7.073