Heats of Formation and Combustion

Table 3. Heats of Combustion and Formation for Metal Carbonyls...

Alcohols, Heats of Combustion and Formation. See F.D.Rossini, BurStdsJRes 13, 189(1934) and under individual alcohols Alcohols, Nitrated, Heats of Combustion... 

The dipole moments and structures of the org azides and aliphatic diazo compds were studied by Sidgwick et al (Ref 4). Sheinker Syrkin (Ref 13) made vibrational spectra measurements of org azides and deduced the configuration of azide compds. UV spectra confirmed the observations made on Raman and IR spectra. Heats of combustion and formation of org azides were detd by Murrin Carpenter (Ref 16). Patterson et al (Ref 7) discussed the CA method of naming and indexing org azides. For addnl info and discussion of org azides see the general references (Refs 1,2,3,5,8,10 A 12)... 

Thermochemical data are available (Ref 2) on the heats of combustion and formation for all five isomers, on the heats of nitration from various Dinitrotoluenes for the 23,4-, 2,4,5-, and 2,3,6-isomers, and on the heats of crystn for the 2,3,4- and 2,4,5-isomers. Data are also available (Ref 1) on the shock sensitivities of all of the isomers except 2,3,6-, and on the rates of decompn at 140° of the 23,4-, 2,4,5-, and 23,5-isomers. The detonation pressure and the temp coefficient of decompn between 140 and 180° have been measured for the 2,4,5-isomer 2,3,4- and 2,4,5-TNT form addition compds ( 7r-complexes ) at 1 1 molar ratio with several polycyclic aromatic hydrocarbons (naphthalene, acenaphthene, fluorene, phenanthrene and anthracene) (Ref 2). 2,4,5-TNT forms complexes with 4-aminozaobenzene, 4-aminoacetophenone, bis (2 hydroxy ethyl) amine, and tris (2-hydroxy-ethyl) amine (Ref 1). The first two have a 1 1 molar ratio, the third 1 2, and the fourth 2 1. Upon heating, the two 4-amino compds react with replacement of the 5-nitro group, as discussed below... 

Tanaka, T. Heats of combustion and formation of lower members of methoxy end-blocked dimethylpolysiloxanes. J. inorg. nuclear Chem. 13, 225-230 (1960). 

Thompson, R. Heats of Combustion and Formation of Some Linear Polydimethylsiloxanes the SiC and SiO Bond-energy Terms. J. chem. Soc. 1953, 1908-1914. 

HEATS OF COMBUSTION AND FORMATION OF UNSYMMETRICAL ISOMERS OF TRINITROTOLUENE... 

By approximation other quantities are additive as well, such as the molar volume, molar heat capacity, molar heat of combustion and formation, molar refraction, etc. 

The heat of formation of H2S2 does not appear to have been directly determined. We obtain 67 kcal from the available information 329. Xhe heat of combustion and formation of dimethyl and diethyldisulphide have been determined by Franklin and Lumpkin 161. From dimethyldisulphide we obtain J5 (S-S)=67 kcal, from diethyldisulphide we obtain 70 kcal. Pauling 382 deduced E S S) to be 64 kcal from the heat of formation of Sg. This is an interesting contrast to the corresponding bonds to oxygen we have that E C -0)>E 0 -O) whereas E (G -S)< (S -S). E(S==S) is the dissociation energy of 82, which is probably 102 kcal (Section 9.16.16). 

Heats of combustion and formation, respectively. Values of these properties at 25°C and 1 atmosphere are listed in Table B.l. 

TABLE 7. Heat of combustion and formation of various solid 4-aminonaphthalenesulphonamides, 4-NH2C10H7SO2NHR, from Reference 29 (all data are in kcal mol" )... 

In 1982, Van, Zhang, Jiang and Hu41 (VZJH) reported the heats of combustion and formation of benzenesulphonamide and two of its methyl (i.e. toluene) derivatives, x-RC6H4S02NH2 R = H, 24a x-R = 2 and 4-Me, 67a and 67b, respectively. These findings are presented in Table 11. The results are internally consistent. The relative isomer stabilities of 67a and 67b is qualitatively and quantitatively consistent with that of other substituted benzenes [e.g. <5AHf(s, 37b, 37d) = 0.8 kcal mol-1]. In addition, that either of the isomeric toluenesulphonamides, 67a and 67b, is some 9 kcal mol-1 lower than that of... 

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