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All results from a given calculation for CH3CCH (propyne)

using model chemistry: B2PLYP=FULL/aug-cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A'
Energy calculated at B2PLYP=FULL/aug-cc-pVTZ
 hartrees
Energy at 0K-116.608211
Energy at 298.15K 
HF Energy-116.431039
Nuclear repulsion energy58.864028
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 B2PLYP=FULL/aug-cc-pVTZ
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 3488 3346 59.27 30.02 0.25 0.40
2 A1 3060 2935 16.16 235.67 0.02 0.03
3 A1 2194 2105 6.95 149.91 0.13 0.23
4 A1 1423 1366 0.10 9.73 0.43 0.60
5 A1 945 907 0.50 5.93 0.03 0.05
6 E 3123 2996 5.66 71.16 0.75 0.86
6 E 3123 2996 5.66 71.16 0.75 0.86
7 E 1497 1436 8.46 5.81 0.75 0.86
7 E 1497 1436 8.46 5.81 0.75 0.86
8 E 1067 1024 0.13 0.25 0.75 0.86
8 E 1067 1024 0.13 0.25 0.75 0.86
9 E 664 637 46.96 2.80 0.75 0.86
9 E 664 637 46.96 2.80 0.75 0.86
10 E 339 325 8.92 3.25 0.75 0.86
10 E 339 325 8.92 3.25 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12245.3 cm-1
Scaled (by 0.9594) Zero Point Vibrational Energy (zpe) 11748.1 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 B2PLYP=FULL/aug-cc-pVTZ
ABC
5.38582 0.28682 0.28682

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/aug-cc-pVTZ

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.238
C2 0.000 0.000 0.217
C3 0.000 0.000 1.421
H4 0.000 0.000 2.479
H5 0.000 1.017 -1.625
H6 0.881 -0.509 -1.625
H7 -0.881 -0.509 -1.625

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7
C11.45502.65873.71731.08841.08841.0884
C21.45501.20372.26242.10392.10392.1039
C32.65871.20371.05863.21073.21073.2107
H43.71732.26241.05864.22814.22814.2281
H51.08842.10393.21074.22811.76231.7623
H61.08842.10393.21074.22811.76231.7623
H71.08842.10393.21074.22811.76231.7623

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 110.800
C2 C1 H6 110.800 C2 C1 H7 110.800
C2 C3 H4 180.000 H5 C1 H6 108.110
H5 C1 H7 108.110 H6 C1 H7 108.110
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability