Enthalpies of combustion of four N-phenylmethylene benzenamine N-oxide derivatives, of N-phenylmethylene benzenamine, and of trans-diphenyldiazene N-oxide: the dissociation enthalpy of the (N-O) bonds

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Article on enthalpies of combustion of four N-phenylmethylene benzenamine N-oxide derivatives, of N-phenylmethylene benzenamine, and of trans-diphenyldiazene N-oxide and the dissociation enthalpy of the (N-O) bonds.

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Kirchner, James J.; Acree, William E. (William Eugene); Pilcher, Geoffrey & Shaofeng, Li August 1, 1986.

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Article on enthalpies of combustion of four N-phenylmethylene benzenamine N-oxide derivatives, of N-phenylmethylene benzenamine, and of trans-diphenyldiazene N-oxide and the dissociation enthalpy of the (N-O) bonds.

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7 p.

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Abstract: The standard (p˚ = 101.325 kPa) molar enthalpies of combustion at 298.15 K were measured by static-bomb calorimetry and the standard molar enthalpies of sublimation were measured by microcalorimetry for four N-phenylmethylene benzenamine N-oxide derivatives, for N-phenylmethylene benzenamine, for trans-diphenyldiazene N-oxide: C6H5CH=N(O)C6H5 6835.7 ± 1.0 115.0 ± 0.8 4-CH3OC6H4CH=N(O)C6H5 7346.1 ± 1.2 130.6 ± 1.2 4-(CH3)2CHC6H4CH=N(O)C6H5 8780.0 ± 1.5 127.2 ± 1.7 2-HOC6H4CH=N(O)C6H5 6625.1 ± 1.1 116.5 ± 1.4 C6H5CH=NC6H5 6872.7 ± 1.1 93.7 ± 0.9 C6H5N=N(O)C6H5 6394.7 ± 1.5 98.6 ± 0.9. From the standard molar enthalpies of formation of the gaseous compounds, the dissociation enthalpies of the (N-O) bonds were derived, in N-phenylmethylene benzenamine N-oxide, D(N-O)/(kJ • mol(-1)) = (264.9 ± 3.0) and in trans-diphenyldiazene N-oxide, D(N-O)/(kJ • mol(-1)) = (321.5 ± 2.9). The intramolecular hydrogen-bond enthalpy in N-2-hydroxyphenylmethylene benzenamine N-oxide was assessed as (30 ± 7) kJ • mol(-1).

© 1986 Academic Press Inc. (London) Limited.

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  • Journal of Chemical Thermodynamics, 1986, Waltham: Academic Press, pp. 793-799

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  • Publication Title: Journal of Chemical Thermodynamics
  • Volume: 18
  • Issue: 8
  • Page Start: 793
  • Page End: 799
  • Pages: 7
  • Peer Reviewed: Yes

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  • August 1, 1986

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  • January 10, 1986

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  • July 9, 2015, 6:19 a.m.

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Kirchner, James J.; Acree, William E. (William Eugene); Pilcher, Geoffrey & Shaofeng, Li. Enthalpies of combustion of four N-phenylmethylene benzenamine N-oxide derivatives, of N-phenylmethylene benzenamine, and of trans-diphenyldiazene N-oxide: the dissociation enthalpy of the (N-O) bonds, article, August 1, 1986; [Waltham, Massachusetts]. (digital.library.unt.edu/ark:/67531/metadc674062/: accessed September 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT College of Arts and Sciences.