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All results from a given calculation for CH3CCH (propyne)

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

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-pVDZ
 hartrees
Energy at 0K-116.537234
Energy at 298.15K 
HF Energy-116.396161
Nuclear repulsion energy58.295602
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-pVDZ
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 3498 3364 59.51 32.87 0.24 0.39
2 A1 3059 2942 18.38 239.31 0.02 0.03
3 A1 2185 2101 6.23 144.62 0.14 0.25
4 A1 1399 1346 0.22 8.96 0.44 0.61
5 A1 947 911 0.75 6.39 0.04 0.07
6 E 3136 3017 6.67 73.30 0.75 0.86
6 E 3136 3017 6.67 73.30 0.75 0.86
7 E 1465 1409 8.18 5.94 0.75 0.86
7 E 1465 1409 8.18 5.94 0.75 0.86
8 E 1043 1004 0.04 0.21 0.75 0.86
8 E 1043 1004 0.04 0.21 0.75 0.86
9 E 599 577 52.27 2.67 0.75 0.86
9 E 599 577 52.27 2.67 0.75 0.86
10 E 304 293 5.81 4.75 0.75 0.86
10 E 304 293 5.81 4.75 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12091.8 cm-1
Scaled (by 0.9618) Zero Point Vibrational Energy (zpe) 11629.9 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-pVDZ
ABC
5.28382 0.28146 0.28146

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.250
C2 0.000 0.000 0.216
C3 0.000 0.000 1.435
H4 0.000 0.000 2.504
H5 0.000 1.027 -1.637
H6 0.890 -0.514 -1.637
H7 -0.890 -0.514 -1.637

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7
C11.46532.68483.75411.09801.09801.0980
C21.46531.21952.28882.11872.11872.1187
C32.68481.21951.06923.23973.23973.2397
H43.75412.28881.06924.26724.26724.2672
H51.09802.11873.23974.26721.77921.7792
H61.09802.11873.23974.26721.77921.7792
H71.09802.11873.23974.26721.77921.7792

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 110.676
C2 C1 H6 110.676 C2 C1 H7 110.676
C2 C3 H4 180.000 H5 C1 H6 108.241
H5 C1 H7 108.241 H6 C1 H7 108.240
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability