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Thermochemistry of imines: experimental standard molar enthalpies of formation

✍ Scribed by Sergey P. Verevkin; Jens Morgenthaler; Christoph Rüchardt

Publisher
Elsevier Science
Year
1997
Tongue
English
Weight
181 KB
Volume
29
Category
Article
ISSN
0021-9614

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✦ Synopsis

The standard ( p°= 0.1 MPa) molar enthalpies of formation DfH°m(l or cr) at the temperature T = 298.15 K were measured using combustion calorimetry for benzophenone-imine (A), N-methyl-benzaldehyde-imine (B), N-benzyl-benzaldehyde-imine (C), N-benzyl-pivalophenone-imine (D), N-cyclohexyl-(2,4,6-trimethyl)-benzaldehyde-imine (E), N-phenyl-benzaldehyde-imine (F), N-phenyl-4-nitro-benzaldehyde-imine (G), and N-phenyl-benzophenone-imine (H). The standard molar enthalpies of vaporization D g l H°m or sublimation D g cr H°m of compounds A to H were obtained from the temperature variation of the vapour pressure measured in a flow system. Molar enthalpies of fusion D l cr H°m of solid compounds were measured by d.s.c.

172.69 2 0.85 75.72 2 0.97 248.4 2 1.3 B(l) 105.85 2 0.83 51.22 2 0.20 157.07 2 0.85 C(l) 183.78 2 0.70 85.0 2 1.2 268.8 2 1.4 D(cr) 46.74 2 0.98 27.86 2 0.21 109.7 2 3.3 156.4 2 3.4 E(cr) -128.0 2 2.0 25.61 2 0.21 104.85 2 0.83 -23.2 2 2.2 F(cr) 181.6 2 1.4 20.42 2 0.21 98.1 2 1.2 279.7 2 1.8 G(cr) 137.50 2 0.74 24.56 2 0.21 126.0 2 1.3 263.5 2 1.5 H(cr) 252.5 2 1.4 29.14 2 0.21 119.7 2 1.8 372.2 2 2.3

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