PM7 Accuracy

acetic anhydride   1324 Acetic anhydride

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    #  Species Formula
  1314 B2O3H2H2B2O3
  1315 B2O3H2 (Geo)H2B2O3
  1316 B3O3H3H3B3O3
  1317 B3O3H3 (Geo)H3B3O3
  1318 1,3,5-TrioxaneC3H6O3
  1319 Methyl hydroxyacetateC3H6O3
  1320 GlycerolC3H8O3
  1321 Trimethoxyborane (Geo)H9BC3O3
  1322 TrimethoxyboraneH9BC3O3
  1323 Maleic anhydrideC4H2O3
  1324 Acetic anhydride C4H6O3
  1325 TrimethoxymethaneC4H10O3
  1326 2,5,8-TrioxanonaneC6H14O3
  1327 TriethoxyboraneH15BC6O3
  1328 m-Salicylic acidC7H6O3
  1329 o-Salicylic acidC7H6O3
  1330 p-Salicylic acidC7H6O3
  1331 2,3-Butanediol, 2,3-dimethyl-, monoformateC7H14O3
  1332 Trimethoxymethyl benzeneC10H14O3
  1333 1-tert-Butoxy-3-propoxy-2-propanolC10H22O3
  1334 1-Butoxy-3-tert-butyl-2-propanolC11H24O3


DHf: -137.1 kcal/mol,     REF: J. O. Cox, G. Pilcher, "Thermochemistry of Organic and Organometallic Compounds," Academic Press, New York, N.Y., 1970.
  
 PM7
Acetic anhydride
 H=-137.1 HR=C&P1970
  C    -0.00318129  1   0.07523850  1  -0.12034857  1
  C     1.48138032  1   0.00242932  1  -0.03262995  1
  O     1.98033269  1   1.28856149  1  -0.05044284  1
  C     3.25202150  1   1.60728303  1   0.37815505  1
  C     3.59826596  1   2.95433059  1  -0.15224712  1
  H     2.79073697  1   3.68246683  1   0.02832506  1
  H     3.75835690  1   2.92344804  1  -1.24216339  1
  H     4.51859221  1   3.33738827  1   0.31690761  1
  O     3.88134783  1   0.89602541  1   1.10096612  1
  O     2.18938594  1  -0.95785117  1  -0.00976465  1
  H    -0.42995172  1  -0.89028402  1  -0.43548981  1
  H    -0.33386331  1   0.84720826  1  -0.83350664  1
  H    -0.44206256  1   0.33271398  1   0.85746480  1