PM7 Accuracy

1,2,4,5-tetrachlorobenzene   2610 1,2,4,5-Tetrachlorobenzene

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    #  Species Formula
  2600 B2Cl4 (Geo)B2Cl4
  2601 B4Cl4 (Geo)B4Cl4
  2602 Carbon tetrachlorideCCl4
  2603 Carbon tetrachloride (Geo)CCl4
  2604 Tetrachloroethylene (Geo)C2Cl4
  2605 TetrachloroethyleneC2Cl4
  2606 1,1,2,2-TetrachloroethaneC2H2Cl4
  2607 1,2,2,2-TetrachloroethaneC2H2Cl4
  2608 1,2,3,4-TetrachlorobenzeneC6H2Cl4
  2609 1,2,3,5-TetrachlorobenzeneC6H2Cl4
  2610 1,2,4,5-Tetrachlorobenzene C6H2Cl4
  2611 Trichloroacetyl chlorideC2O2Cl4
  2612 2,3,5,6-Tetrachloro-1,4-benzoquinoneC6O2Cl4
  2613 2,3,5,6-Tetrachloro-1,4-benzoquinone (Geo)C6O2Cl4
  2614 Mg(II)Cl4(2-) (DUPCOG) (Geo)MgCl4
  2615 Mg(II)Cl4(2-) (DUPCOG)MgCl4
  2616 Magnesium dichloride, dimerMg2Cl4
  2617 Al(III)Cl4(-) (CALZUK) (Geo)AlCl4
  2618 Al(III)Cl4(-) (CALZUK)AlCl4
  2619 LiAlCl4LiAlCl4
  2620 Al(III)CCl3 (MALCLD) (Geo)C2H6Al2Cl4


DHf: -7.8 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
1,2,4,5-Tetrachlorobenzene
 H=-7.796 HR=NIST
  C     0.00000000  0    0.0000000  0    0.0000000  0     0     0     0
  C     1.39148653  1    0.0000000  0    0.0000000  0     1     0     0
  C     1.39128091  1  118.3383047  1    0.0000000  0     2     1     0
  C     1.39147455  1  120.8024119  1    0.0051393  1     3     2     1
  C     1.39149245  1  120.8910831  1    0.0036969  1     4     3     2
  C     1.39145034  1  120.8291619  1   -0.0026616  1     1     2     3
 Cl     1.69633784  1  118.4518246  1  179.9950755  1     1     2     3
 Cl     1.69662001  1  120.7218495  1  179.9956128  1     6     1     2
 Cl     1.69626241  1  118.4585305  1 -179.9986402  1     3     2     1
 Cl     1.69680894  1  120.6969713  1  179.9999306  1     4     3     2
  H     1.09532601  1  120.7527060  1 -179.9985652  1     2     1     6
  H     1.09516883  1  120.8751104  1  179.9984196  1     5     4     3