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All results from a given calculation for CH3CCH (propyne)

using model chemistry: B2PLYP=FULL/6-31G(2df,p)

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/6-31G(2df,p)
 hartrees
Energy at 0K-116.554132
Energy at 298.15K 
HF Energy-116.395705
Nuclear repulsion energy58.782890
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/6-31G(2df,p)
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 3534 3534 58.78 33.89 0.23 0.37
2 A1 3073 3073 15.51 159.83 0.01 0.01
3 A1 2217 2217 1.70 75.64 0.28 0.43
4 A1 1431 1431 0.53 16.07 0.50 0.66
5 A1 951 951 0.59 3.94 0.16 0.28
6 E 3145 3145 7.35 75.58 0.75 0.86
6 E 3145 3145 7.35 75.58 0.75 0.86
7 E 1503 1503 5.99 15.17 0.75 0.86
7 E 1503 1503 5.99 15.17 0.75 0.86
8 E 1068 1068 0.63 0.01 0.75 0.86
8 E 1068 1068 0.63 0.01 0.75 0.86
9 E 612 612 45.58 0.18 0.75 0.86
9 E 612 612 45.58 0.18 0.75 0.86
10 E 333 333 3.42 6.74 0.75 0.86
10 E 333 333 3.42 6.74 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12263.5 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 12263.5 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 B2PLYP=FULL/6-31G(2df,p)
ABC
5.36701 0.28617 0.28617

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/6-31G(2df,p)

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 1.422
H4 0.000 0.000 2.482
H5 0.000 1.019 -1.629
H6 0.883 -0.510 -1.629
H7 -0.883 -0.510 -1.629

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7
C11.45542.66073.72031.09171.09171.0917
C21.45541.20522.26492.10922.10922.1092
C32.66071.20521.05973.21753.21753.2175
H43.72032.26491.05974.23594.23594.2359
H51.09172.10923.21754.23591.76541.7654
H61.09172.10923.21754.23591.76541.7654
H71.09172.10923.21754.23591.76541.7654

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 110.993
C2 C1 H6 110.993 C2 C1 H7 110.993
C2 C3 H4 180.000 H5 C1 H6 107.908
H5 C1 H7 107.908 H6 C1 H7 107.908
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability