TY - JOUR
T1 - Solid-liquid Equilibria for the Quinoline-indole, Isoquinoline-indole, 2-Methylquinoline-indole and 2-Methylquinoline-isoquinoline Systems
AU - Ebina, Takeo
AU - Yokoyama, Chiaki
AU - Takahash, Shinji
PY - 1995
Y1 - 1995
N2 - Solid-liquid equilibria of the four binary systems of quinoline-indole, isoquinoline-indole, 2-methyl-quinoline-indole, and 2-methylquinoline-isoquinoline were determined, using a visual observation method and differential scanning calorimetry in temperature range from 250 to 330 K. Eutectic phase diagrams were confirmed for these four systems. In the three systems containing indole, it was found that addition compounds formed. For isoquinoline-indole and 2-meth-ylquinoline-indole systems, stoichiometry rations of the first component to indole of the addition compounds were 1:1. From infrared spectroscopy analysis, a N-H-N type hydrogen bonding between isoquinoline and indole was confirmed. For quinoline-indole system, two types of addition compound were observed, of which stoichiometry rations of quinoline to indole were 1:1 and 2:1. From dissociation equilibrium relations and material balances, the equations for mole fractions of pure and addition compounds were derived, using dissociation constants as variables. Based on these equations, solid-liquid equilibria for the systems which form addition compounds were correlated.
AB - Solid-liquid equilibria of the four binary systems of quinoline-indole, isoquinoline-indole, 2-methyl-quinoline-indole, and 2-methylquinoline-isoquinoline were determined, using a visual observation method and differential scanning calorimetry in temperature range from 250 to 330 K. Eutectic phase diagrams were confirmed for these four systems. In the three systems containing indole, it was found that addition compounds formed. For isoquinoline-indole and 2-meth-ylquinoline-indole systems, stoichiometry rations of the first component to indole of the addition compounds were 1:1. From infrared spectroscopy analysis, a N-H-N type hydrogen bonding between isoquinoline and indole was confirmed. For quinoline-indole system, two types of addition compound were observed, of which stoichiometry rations of quinoline to indole were 1:1 and 2:1. From dissociation equilibrium relations and material balances, the equations for mole fractions of pure and addition compounds were derived, using dissociation constants as variables. Based on these equations, solid-liquid equilibria for the systems which form addition compounds were correlated.
KW - DSC
KW - Heteronuclear aromatics
KW - IR
KW - Indole
KW - Quinoline
KW - Solid liquid equilibrium
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U2 - 10.1627/jpi1958.38.413
DO - 10.1627/jpi1958.38.413
M3 - Article
AN - SCOPUS:84998494090
VL - 38
SP - 413
EP - 420
JO - Journal of the Japan Petroleum Institute
JF - Journal of the Japan Petroleum Institute
SN - 1346-8804
IS - 6
ER -