Accuracy

1,2,3,4-tetramethylfulvene    291 1,2,3,4-Tetramethylfulvene

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    #  Species Formula
   281 2a,4a,6a,6b-TetrahydrocyclopentapentaleneC10H10
   282 BulvaleneC10H10
   283 DiisopropenyldiacetyleneC10H10
   284 Tricyclo[6.2.0.0]deca-1(8),2,6-trieneC10H10
   285 1,2,6,7-CyclodecatetraeneC10H12
   286 Dispiro[2.2.2.2]deca-4,9-dieneC10H12
   287 TetralinC10H12
   288 (1-Methylpropyl) benzeneC10H14
   289 (2-Methylpropyl) benzeneC10H14
   290 1,2,3,4-Tetramethyl benzeneC10H14
   291 1,2,3,4-Tetramethylfulvene C10H14
   292 1,2,3,5-Tetramethyl benzeneC10H14
   293 1,2,4,5-Tetramethyl benzeneC10H14
   294 tert-Butyl benzeneC10H14
   295 TetrahydrotriquinaceneC10H14
   296 1,2,3,4,5-Pentamethyl-1,3-cyclopentadieneC10H16
   297 AdamantaneC10H16
   298 CampheneC10H16
   299 PerhydrotriquinaceneC10H16
   300 1-Methyl-4-(1-methylethyl)-cyclohexeneC10H18
   301 4-Methyl-1-(1-methylethyl)-cyclohexeneC10H18


ΔHf: 19.9 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
1,2,3,4-Tetramethylfulvene
 H=19.9 HR=NIST
  C     0.00000000 +0    0.0000000 +0    0.0000000 +0     0     0     0
  C     1.35885094 +1    0.0000000 +0    0.0000000 +0     1     0     0
  C     1.48452827 +1  108.8809589 +1    0.0000000 +0     2     1     0
  C     1.35914555 +1  108.8802158 +1    0.0195957 +1     3     2     1
  C     1.48696019 +1  108.4789459 +1    0.0375524 +1     1     2     3
  C     1.47412455 +1  129.1956958 +1  179.9963087 +1     1     2     3
  C     1.47495974 +1  128.7642962 +1  179.9973029 +1     2     1     5
  C     1.47499831 +1  122.3344681 +1 -179.9780453 +1     3     2     1
  C     1.47421662 +1  129.1701516 +1 -179.9895069 +1     4     3     2
  C     1.33217664 +1  127.3563848 +1  179.9850839 +1     5     1     2
  H     1.10130380 +1  111.2574921 +1  120.3637921 +1     6     1     2
  H     1.09911158 +1  112.5054199 +1    0.1323829 +1     6     1     2
  H     1.10130633 +1  111.2438752 +1 -120.0853074 +1     6     1     2
  H     1.10126097 +1  111.1901932 +1  120.2172281 +1     7     2     1
  H     1.09902059 +1  112.5575664 +1   -0.1028864 +1     7     2     1
  H     1.10126599 +1  111.2016244 +1 -120.4360306 +1     7     2     1
  H     1.09905181 +1  112.5658279 +1 -179.8861947 +1     8     3     2
  H     1.10127642 +1  111.1852724 +1   59.7894077 +1     8     3     2
  H     1.10127277 +1  111.2025616 +1  -59.5458821 +1     8     3     2
  H     1.10131829 +1  111.2565911 +1 -120.3551140 +1     9     4     3
  H     1.10132052 +1  111.2428223 +1  120.0971337 +1     9     4     3
  H     1.09913615 +1  112.4937932 +1   -0.1226297 +1     9     4     3
  H     1.07936898 +1  123.2905123 +1 -179.9902036 +1    10     5     1
  H     1.07936403 +1  123.2805380 +1    0.0078944 +1    10     5     1