PM7 Accuracy

2a,4a,6a,6b-tetrahydrocyclopentapentalene    283 2a,4a,6a,6b-Tetrahydrocyclopentapentalene

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    #  Species Formula
   273 cis-cis-trans-1,3,5-Trimethyl cyclohexaneC9H18
   274 3,3-DiethylpentaneC9H20
   275 n-NonaneC9H20
   276 Tri-isopropylboraneH21BC9
   277 TripropylboraneH21BC9
   278 AzuleneC10H8
   279 Naphthalene (Geo)C10H8
   280 NaphthaleneC10H8
   281 1,4-Dicyclopropylbuta-1,3-diyneC10H10
   282 1-Butynl benzeneC10H10
   283 2a,4a,6a,6b-Tetrahydrocyclopentapentalene C10H10
   284 BulvaleneC10H10
   285 DiisopropenyldiacetyleneC10H10
   286 Tricyclo[6.2.0.0]deca-1(8),2,6-trieneC10H10
   287 1,2,6,7-CyclodecatetraeneC10H12
   288 Dispiro[2.2.2.2]deca-4,9-dieneC10H12
   289 TetralinC10H12
   290 (1-Methylpropyl) benzeneC10H14
   291 (2-Methylpropyl) benzeneC10H14
   292 1,2,3,4-Tetramethyl benzeneC10H14
   293 1,2,3,4-TetramethylfulveneC10H14


DHf: 53.1 kcal/mol,     REF: NIST Chemistry WebBook, NIST Standard Reference Database, No. 69; W. G. Mallard, P. J. Linstrom, Eds., National Institute of Standards and Technology, Gaithersberg, http://webbook.nist.gov/chemistry.
  
 PM7
2a,4a,6a,6b-Tetrahydrocyclopentapentalene
 H=53.1 HR=NIST
  C     0.00000000  0    0.0000000  0    0.0000000  0     0     0     0
  C     1.33888724  1    0.0000000  0    0.0000000  0     1     0     0
  C     1.50695792  1  112.6419311  1    0.0000000  0     1     2     0
  C     1.50682021  1  111.8689511  1 -110.4786956  1     3     1     2
  C     1.33900655  1  112.6450106  1  110.5649999  1     4     3     1
  C     1.50698766  1  112.6307187  1   -0.0618875  1     5     4     3
  C     1.50699294  1  111.8056129  1 -110.4416461  1     6     5     4
  C     1.33898956  1  112.6381421  1  110.5293229  1     7     6     5
  C     1.50692855  1  112.6411711  1   -0.0237005  1     2     1     3
  C     1.56650174  1  104.3997836  1    1.8425720  1     3     1     2
  H     1.07447426  1  127.5620580  1 -179.3512594  1     1     2     9
  H     1.07451296  1  127.5541163  1  179.3294230  1     2     1     3
  H     1.10762537  1  111.7153600  1  123.3929236  1     3     1     2
  H     1.07451708  1  119.7950632  1  -68.8562461  1     4     3     1
  H     1.07448576  1  127.5606148  1 -179.3814133  1     5     4     3
  H     1.10752849  1  111.7629690  1  123.4516183  1     6     5     4
  H     1.07456454  1  119.7914990  1  -68.8360836  1     7     6     5
  H     1.07449906  1  127.5639756  1 -179.3054310  1     8     7     6
  H     1.10758957  1  111.7593045  1 -123.3831906  1     9     2     1
  H     1.09375444  1  112.9103215  1  121.1713276  1    10     3     1