Accuracy

2,3,3-trimethyl pentane    252 2,3,3-Trimethyl pentane

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    #  Species Formula
   242 3-OctyneC8H14
   243 4-OctyneC8H14
   244 Bicyclo(2.2.2)-octaneC8H14
   245 Bicyclo-2,2,2-octaneC8H14
   246 1-OcteneC8H16
   247 EthylcyclohexaneC8H16
   248 2,2,3,3-Tetramethyl butaneC8H18
   249 2,2,3-Trimethyl pentaneC8H18
   250 2,2,4-Trimethyl pentaneC8H18
   251 2,2-Dimethyl hexaneC8H18
   252 2,3,3-Trimethyl pentane C8H18
   253 2,3,4-Trimethyl pentaneC8H18
   254 2,3-Dimethyl hexaneC8H18
   255 2,4-Dimethyl hexaneC8H18
   256 2,5-Dimethyl hexaneC8H18
   257 2-Methyl heptaneC8H18
   258 3,3-Dimethyl hexaneC8H18
   259 3,4-Dimethyl hexaneC8H18
   260 3-Ethyl hexaneC8H18
   261 3-Ethyl-2-methyl pentaneC8H18
   262 3-Ethyl-3-methyl pentaneC8H18


ΔHf: -51.7 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
2,3,3-Trimethyl pentane
 HR=NIST H=-51.73
  C     0.00000000 +0    0.0000000 +0    0.0000000 +0     0     0     0
  C     1.52875351 +1    0.0000000 +0    0.0000000 +0     1     0     0
  C     1.55187610 +1  114.3222025 +1    0.0000000 +0     2     1     0
  C     1.56292579 +1  107.8141218 +1 -176.7057258 +1     3     2     1
  C     1.53541376 +1  112.3266978 +1   67.9462266 +1     4     3     2
  C     1.53530142 +1  112.6603507 +1  122.8376393 +1     4     3     5
  C     1.53407266 +1  110.4351662 +1  121.7629065 +1     3     2     4
  C     1.53923911 +1  108.9392233 +1  119.7952270 +1     3     2     7
  H     1.09521020 +1  111.9063546 +1  -55.8996398 +1     1     2     3
  H     1.09569762 +1  111.4496237 +1  120.4726590 +1     1     2     9
  H     1.09585901 +1  110.8051159 +1  119.5897137 +1     1     2    10
  H     1.10652234 +1  109.3522788 +1  122.3346510 +1     2     1     3
  H     1.10730580 +1  108.7670863 +1  115.1291066 +1     2     1    12
  H     1.11815087 +1  107.1094151 +1  118.4564536 +1     4     3     6
  H     1.09444799 +1  112.1177296 +1  -51.8023536 +1     5     4     3
  H     1.09548339 +1  111.3201971 +1  120.4945287 +1     5     4    15
  H     1.09538036 +1  110.8585222 +1  119.5206819 +1     5     4    16
  H     1.09474941 +1  111.6218187 +1  -55.1703680 +1     6     4     3
  H     1.09454763 +1  111.7300082 +1  120.8712397 +1     6     4    18
  H     1.09580074 +1  110.8699440 +1  119.4108922 +1     6     4    19
  H     1.09466120 +1  111.4055630 +1 -170.5316831 +1     7     3     2
  H     1.09458377 +1  111.4281797 +1  120.3696989 +1     7     3    21
  H     1.09508039 +1  111.2217287 +1  119.9052784 +1     7     3    22
  H     1.09413870 +1  111.4102491 +1   65.2761332 +1     8     3     2
  H     1.09465455 +1  111.4376018 +1  120.6963697 +1     8     3    24
  H     1.09503212 +1  111.3678202 +1  119.2223724 +1     8     3    25