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All results from a given calculation for C8H6 (Pentalene)

using model chemistry: CCD/cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2H 1Ag
Energy calculated at CCD/cc-pVTZ
 hartrees
Energy at 0K-307.708876
Energy at 298.15K 
HF Energy-306.445163
Nuclear repulsion energy314.888458
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 CCD/cc-pVTZ
Rotational Constants (cm-1) from geometry optimized at CCD/cc-pVTZ
See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/cc-pVTZ

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.341 1.088 0.000
C2 2.157 -0.176 0.000
C3 1.341 -1.248 0.000
C4 -1.341 -1.088 0.000
C5 -2.157 0.176 0.000
C6 -1.341 1.248 0.000
C7 0.045 0.733 0.000
C8 -0.045 -0.733 0.000
H9 1.764 2.081 0.000
H10 3.235 -0.193 0.000
H11 1.635 -2.285 0.000
H12 -1.764 -2.081 0.000
H13 -3.235 0.193 0.000
H14 -1.635 2.285 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 C7 C8 H9 H10 H11 H12 H13 H14
C11.50432.33623.45323.61432.68611.34392.28801.07942.28713.38544.43654.66273.2074
C21.50431.34753.61434.32753.77602.29932.27062.29061.07892.17234.35915.40464.5200
C32.33621.34752.68613.77603.66352.36751.47793.35592.16871.07743.21454.79764.6190
C43.45323.61432.68611.50432.33622.28801.34394.43654.66273.20741.07942.28713.3854
C53.61434.32753.77601.50431.34752.27062.29934.35915.40464.52002.29061.07892.1723
C62.68613.77603.66352.33621.34751.47792.36753.21454.79764.61903.35592.16871.0774
C71.34392.29932.36752.28802.27061.47791.46882.18493.32253.41113.34513.32402.2866
C82.28802.27061.47791.34392.29932.36751.46883.34513.32402.28662.18493.32253.4111
H91.07942.29063.35594.43654.35913.21452.18493.34512.70834.36745.45625.34413.4054
H102.28711.07892.16874.66275.40464.79763.32253.32402.70832.63355.34416.48225.4644
H113.38542.17231.07743.20744.52004.61903.41112.28664.36742.63353.40545.46445.6188
H124.43654.35913.21451.07942.29063.35593.34512.18495.45625.34413.40542.70834.3674
H134.66275.40464.79762.28711.07892.16873.32403.32255.34416.48225.46442.70832.6335
H143.20744.52004.61903.38542.17231.07742.28663.41113.40545.46445.61884.36742.6335

picture of Pentalene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 109.887 C1 C2 H10 123.761
C1 C7 C6 144.284 C1 C7 C8 108.792
C2 C1 C7 107.531 C2 C1 H9 124.055
C2 C3 C8 106.866 C2 C3 H11 126.872
C3 C2 H10 126.352 C3 C8 C4 144.284
C3 C8 C7 106.924 C4 C5 C6 109.887
C4 C5 H13 123.761 C4 C8 C7 108.792
C5 C4 C8 107.531 C5 C4 H12 124.055
C5 C6 C7 106.866 C5 C6 H14 126.872
C6 C5 H13 126.352 C6 C7 C8 106.924
C7 C1 H9 128.413 C7 C6 H14 126.262
C8 C3 H11 126.262 C8 C4 H12 128.413
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability