Standard molar enthalpies of formation of three branched alkyl carboxylic acids

Standard molar enthalpies of formation of 2-chloroquinoline, 4-chloroquinoline, 6-chloroquinoline and 4,7-dichloroquinoline by rotating-bomb calorimetry

“…These facts are in agreement with the already reported evidence [51] that the enthalpic increments in the quinoline structure, if in the pyridinic ring or in the benzenic ring are similar, respectively, to the ones in pyridine and in benzene. However, the enthalpic increment for the entrance of a chlorine atom in the position 2 of quinoline found in the present work, À(46.4 ± 3.4) kJ AE mol À1 , differs from the identical increment on the ortho-position of pyridine by (10.5 ± 3.9) kJ AE mol À1 , which is the limit usually accepted for a [11] reasonable agreement between experimental and calculated values [20]. At present, we have no explanation for such a large difference.…”

“…Both the apparatus and the operating technique have been described [22][23][24][25][26][27] so only a brief description will be given here. The bomb, with an internal volume of 0.258 dm 3 , is of stainless steel lined with platinum, and the internal fittings are machined from platinum.…”

“…As part of our interest on the thermochemistry of nitrogen heterocycles, in previous work, we have studied the thermochemistry of several substituted hydroxyquinolines [8][9][10][11], alkyl substituted quinolines [12,13], aminoquinolines [14,15], cyanoquinolines [16], nitroquinolines [15,17], phenylquinolines [18] and hydroxyisoquinolines [19] in order to test the possibility of a similar estimation scheme as the one developed by Cox [20] for benzene derivatives. In the present work we extend our study to the thermochemistry of chloroquinolines.…”

Thermochemical study of some chloro and bromo alkyl substituted phthalimides: Structural–energetic correlations

“…Both the apparatus and the operating technique have been described [39][40][41][42][43][44] so only a brief description will be given here. The twin valve bomb, with an internal volume of 0.258 dm 3 and wall thickness of 1 cm, is made of stainless steel, internally lined with platinum, with all the internal fittings entirely machined from platinum.…”

Experimental and computational thermochemical study of the dichloronitrobenzene isomers

“…The choice of these molecules is due to the fact that the effects of the introduction of chlorine atoms in benzene rings [15,[17][18][19][20][21][22][23] as well as the effect of the same substituents into heterocycles [24][25][26][27][28][29][30] has been, for some years, one of the research objectives of our Research Group on thermochemical properties. The experimental investigation includes the determination of the standard molar energies of combustion, in oxygen, at T = 298.15 K, of four dichloronitrobenzene isomers, using a rotating bomb combustion calorimeter, from which the values of the standard molar enthalpies of formation, in the condensed phase, were derived.…”