PM7 Accuracy

1,3,5,7-tetroxane   1382 1,3,5,7-Tetroxane

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    #  Species Formula
  1372 Li(I)(H2O)4(+) (BADTUV10)H8LiO4
  1373 B(OH)4, anion (Geo)H4BO4
  1374 TetrahydroxydiboraneH4B2O4
  1375 Oxalic acidC2H2O4
  1376 Formic acid, dimer (Geo)C2H4O4
  1377 Formic acid, dimerC2H4O4
  1378 DioxybismethanolC2H6O4
  1379 (C2H4)BO4H2, anion (Geo)H6BC2O4
  1380 1,4-Dioxan-2,5-dioneC4H4O4
  1381 Dimethyl oxalateC4H6O4
  1382 1,3,5,7-Tetroxane C4H8O4
  1383 Dimethyl malonateC5H8O4
  1384 Ethylmalonic acidC5H8O4
  1385 Methylene diacetateC5H8O4
  1386 TetramethoxymethaneC5H12O4
  1387 1,1-DiacetoxyethaneC6H10O4
  1388 Dimethyl methylmalonateC6H10O4
  1389 2,2-DiacetoxypropaneC7H12O4
  1390 Diethyl malonateC7H12O4
  1391 Dimethyl dimethylmalonateC7H12O4
  1392 3,5,7,9-TetraoxyundecaneC7H16O4


DHf: -148.2 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
1,3,5,7-Tetroxane
 H=-148.24 HR=NIST
  C     0.00000000  0    0.0000000  0    0.0000000  0     0     0     0
  O     1.39876150  1    0.0000000  0    0.0000000  0     1     0     0
  C     1.39859903  1  118.6938344  1    0.0000000  0     2     1     0
  O     1.39880431  1  112.5265290  1  -88.5112435  1     3     2     1
  C     1.39862805  1  118.5822898  1   88.0727226  1     4     3     2
  O     1.39830403  1  112.5490489  1  -88.2894415  1     5     4     3
  C     1.39853680  1  118.7274145  1   88.7143412  1     6     5     4
  O     1.39800266  1  112.6020706  1   88.5292190  1     1     2     3
  H     1.10120037  1  112.1010163  1  -39.1014718  1     1     2     3
  H     1.11245165  1  102.3398851  1 -162.3543034  1     1     2     3
  H     1.11205562  1  102.4009332  1  162.1921000  1     3     2     1
  H     1.10123733  1  112.1712595  1   38.9190735  1     3     2     1
  H     1.11240876  1  102.3530816  1  162.5124296  1     5     4     3
  H     1.10131353  1  112.1231541  1   39.3150956  1     5     4     3
  H     1.11229053  1  102.3916642  1  162.6397655  1     7     6     5
  H     1.10109097  1  112.1379447  1   39.3234673  1     7     6     5