Acta Phys. -Chim. Sin. ›› 1989, Vol. 5 ›› Issue (06): 745-749.doi: 10.3866/PKU.WHXB19890621

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STUDIES ON THERMOCHEMISTRY OF PORPHYRINS Ⅵ, The Standard Energies of Combustion and Standard Enthalpies of Formation of Tetramethoxyphenylporphyrin and Tetradimethylaminophenylporphyrin

Xu Hong; Wu Dingquan; Qu Songsheng   

  1. Department of Chemistry; Wuhan University; Wuhan
  • Received:1988-06-28 Revised:1988-12-12 Published:1989-12-15
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Abstract: Using a precision static oxygen-bomb calorimeter, the standard energies of combustion at 298.15 K of tetra-(o-methoxyphenyl)porphyrin and tetra-(p-dimethylaminophenyl) porphyrin were determined to be-32. 7967±0.0122 kJ g~(-1), -34.5011±0.0115 kJ g~(-1) respectively, the corresponding standard enthalpies of formation at 298.15K were calculated to be -205.8±9.0 kJ mol~(-1), -434.8±9.1 kJ mol~(-1).