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All results from a given calculation for CH3CCH (propyne)

using model chemistry: TPSSh/6-311G*

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/6-311G*
 hartrees
Energy at 0K-116.685667
Energy at 298.15K 
HF Energy-116.685667
Nuclear repulsion energy58.713267
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/6-311G*
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 3470 3343 43.27 30.03 0.28 0.43
2 A1 3032 2921 23.51 195.39 0.01 0.02
3 A1 2216 2135 5.83 108.77 0.29 0.45
4 A1 1433 1380 0.15 18.81 0.54 0.70
5 A1 943 908 0.75 2.93 0.16 0.28
6 E 3095 2981 16.23 90.60 0.75 0.86
6 E 3095 2981 16.23 90.59 0.75 0.86
7 E 1508 1452 7.83 13.79 0.75 0.86
7 E 1508 1452 7.84 13.79 0.75 0.86
8 E 1066 1027 0.44 0.00 0.75 0.86
8 E 1066 1027 0.44 0.00 0.75 0.86
9 E 618 595 50.50 2.05 0.75 0.86
9 E 618 595 50.50 2.05 0.75 0.86
10 E 325 313 6.55 10.46 0.75 0.86
10 E 325 313 6.55 10.46 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12158.3 cm-1
Scaled (by 0.9632) Zero Point Vibrational Energy (zpe) 11710.8 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 TPSSh/6-311G*
ABC
5.34239 0.28558 0.28558

See section I.F.4 to change rotational constant units
Geometric Data calculated at TPSSh/6-311G*

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 0.218
C3 0.000 0.000 1.423
H4 0.000 0.000 2.487
H5 0.000 1.022 -1.631
H6 0.885 -0.511 -1.631
H7 -0.885 -0.511 -1.631

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7
C11.45832.66293.72721.09381.09381.0938
C21.45831.20462.26892.11262.11262.1126
C32.66291.20461.06433.22013.22013.2201
H43.72722.26891.06434.24284.24284.2428
H51.09382.11263.22014.24281.76941.7694
H61.09382.11263.22014.24281.76941.7694
H71.09382.11263.22014.24281.76941.7694

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 110.934
C2 C1 H6 110.934 C2 C1 H7 110.934
C2 C3 H4 180.000 H5 C1 H6 107.970
H5 C1 H7 107.970 H6 C1 H7 107.970
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at TPSSh/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.743      
2 C 0.098      
3 C -0.293      
4 H 0.220      
5 H 0.239      
6 H 0.239      
7 H 0.239      


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 -0.752 0.752
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 2.988 0.000 0.000
y 0.000 2.988 0.000
z 0.000 0.000 6.966


<r2> (average value of r2) Å2
<r2> 49.912
(<r2>)1/2 7.065