Journal of Chemical Thermodynamics p. 273 - 280 (1995)
Update date:2022-08-17
Topics:
Al-Maydama, H. M. A.
Finch, Arthur
Gardner, P. J.
Head, A. J.
The standard molar enthalpies of formation at the temperature 298.15 K of (CH3)2NPCl2 (l), <(CH3)2N>2PCl(l), and <(CH3)2N>3P(l) have been determined by reaction calorimetry as -(286.3 +/- 2.4) kJ*mol-1, -(220.1 +/- 2.3) kJ*mol-1, and -(112.8 +/- 2.3) kJ*mol-1, respectively.Enthalpies of vaporization have been obtained from vapour-pressure measurements and the corresponding values of ΔfH0m(g) derived as -(245.5 +/- 2.5) kJ*mol-1, -(174.2 +/- 2.6) kJ*mol-1, and -(71.3 +/- 2.4) kJ*mol-1, respectively.The values of the bond enthalpies D(P-Cl) and D(P-N) in substituted phosphines are discussed.
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