Accuracy

1,2,3,4-tetrachlorobenzene   2605 1,2,3,4-Tetrachlorobenzene

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    #  Species Formula
  2595 Thiophosphoryl chloride (Geo)PSCl3
  2596 B2Cl4B2Cl4
  2597 B2Cl4 (Geo)B2Cl4
  2598 B4Cl4 (Geo)B4Cl4
  2599 Carbon tetrachlorideCCl4
  2600 Carbon tetrachloride (Geo)CCl4
  2601 Tetrachloroethylene (Geo)C2Cl4
  2602 TetrachloroethyleneC2Cl4
  2603 1,1,2,2-TetrachloroethaneC2H2Cl4
  2604 1,2,2,2-TetrachloroethaneC2H2Cl4
  2605 1,2,3,4-Tetrachlorobenzene C6H2Cl4
  2606 1,2,3,5-TetrachlorobenzeneC6H2Cl4
  2607 1,2,4,5-TetrachlorobenzeneC6H2Cl4
  2608 Trichloroacetyl chlorideC2O2Cl4
  2609 2,3,5,6-Tetrachloro-1,4-benzoquinoneC6O2Cl4
  2610 2,3,5,6-Tetrachloro-1,4-benzoquinone (Geo)C6O2Cl4
  2611 Mg(II)Cl4(2-) (DUPCOG) (Geo)MgCl4
  2612 Mg(II)Cl4(2-) (DUPCOG)MgCl4
  2613 Magnesium dichloride, dimerMg2Cl4
  2614 Al(III)Cl4(-) (CALZUK) (Geo)AlCl4
  2615 Al(III)Cl4(-) (CALZUK)AlCl4


ΔHf: -6.1 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
1,2,3,4-Tetrachlorobenzene
 H=-6.07 HR=NIST
  C     0.00000000 +0    0.0000000 +0    0.0000000 +0     0     0     0
  C     1.39208460 +1    0.0000000 +0    0.0000000 +0     1     0     0
  C     1.39324277 +1  119.3236790 +1    0.0000000 +0     2     1     0
  C     1.39204132 +1  119.3198278 +1    0.0421706 +1     3     2     1
  C     1.39098014 +1  121.3168641 +1   -0.0276507 +1     4     3     2
  C     1.39101330 +1  121.3118460 +1   -0.0377844 +1     1     2     3
 Cl     1.69829398 +1  118.3177864 +1  179.9665283 +1     1     2     3
 Cl     1.69316774 +1  120.4061378 +1  179.9950014 +1     6     1     2
 Cl     1.69841578 +1  118.2970600 +1  179.9689853 +1     4     3     2
 Cl     1.69313449 +1  120.4106647 +1  179.9705731 +1     5     4     3
  H     1.09340040 +1  120.6536506 +1  179.9828574 +1     2     1     6
  H     1.09334410 +1  119.9804188 +1 -179.9587129 +1     3     2     1