Catalytic conversions of bicyclo64.3.09nonane with activated alumina

Structural Identification of Petroleum Acids by Conversion to Hydrocarbons and Multidimensional Gas Chromatography-Mass Spectrometry

“…The assignments are supported by the identification of multiple isomers of each acid type and are consistent with the (albeit sparse) previous evidence of such acids in other matrixes, identified as the esters . Where possible, the assignments were supported by close matches with the GC × GC retention positions and mass spectra of reference compounds and, for various isomers, the GC × GC elution order of the hydrocarbons additionally matched those reported for other complex mixtures, e.g., from catalytic conversion. ,− The retention indices of the peaks in Figure assigned as the structures in Chart are reported in Table S-2 in the Supporting Information.…”

Thermodynamics of vaporization of some alkyladamantanes

“…The literature data on physicochemical properties of 1,3-DMA (4)(5)(6)(7) are scarce and unreliable (table 1). The T b value in reference 4 was obtained by measuring the low-pressure boiling temperature and was recalculated to p = 101.325 kPa using chromatographic data.…”

“…0.9016 (6) n D 1.4768 (4) 1.4783 (5) 1.4783 (7) vaporization, and the density of the liquid phase at room temperature have been presented. The third communication (3) deals with the determination of the enthalpies of formation of 1,3,5-TMA, 1,3-dimethyladamantane (1,3-DMA), and 1-ethyladamantane by combustion calorimetry.…”

“…(1) In reference 2, the saturation vapour pressure of 1,3,5-TMA obtained by comparative ebulliometry in the temperature range 386 < (T/K) < 482, calorimetric enthalpy of TABLE 1. Physicochemical properties of 1,3-dimethyladamantane, where T b and T fus denote the normal boiling and melting temperatures, and ρ and n D are density and refraction index at T = 293 K. The value of T b in reference 5 was computed from the boiling temperature measured at p = 98.92 kPa; the corresponding p values in references 6 and 7 were not shown T b /K 201.5 (4) 201.2 to 201.4 (5) 204 (6) 201.3 (7) T fus /K −30 (6) ρ/(g · cm −3 )…”

Experimental and molecular statistical study of alkyladamantane adsorption on graphitized thermal carbon black

“…2-4 A leading role belongs to preparative GLC followed by identification of isomers by high performance capil lary GLC on stationary phases (SP). 2, [9][10][11][12][13][14] However, in spite of achieved success in studying the chromatographic behavior of this group of compounds under the GLC con ditions, a series of questions related to efficient separation and identification of some isomers with similar structure even in relatively narrow fractions remains unanswered so far. 2-5,10,12- 14 The influence of specific features of the molecular structure of the adamantane framework on the chromato graphic behavior of adamantane derivatives under the con ditions of gas chromatography was studied by many au thors.…”