title: Thermochemical and Vapor Pressure Behavior of Anthracene and Brominated Anthracene Mixtures.
abstract: The present work concerns the thermochemical and vapor pressure behavior of the anthracene (1) + 2-bromoanthracene (2) and anthracene (1) + 9-bromoanthracene (3) systems. Solid-liquid equilibrium temperature and differential scanning calorimetry studies indicate the existence of a minimum melting solid state near an equilibrium temperature of 477.65 K atx1= 0.74 for the (1) + (2) system. Additionally, solid-vapor equilibrium studies for the (1) + (2) system show that the vapor pressure of the mixtures depends on composition, but does not follow ideal Raoult's law behaviour. The (1) + (3) system behaves differently from the (1) + (2) system. The (1) + (3) system has a solid solution like phase diagram. The system consists of two phases, an anthracene like phase and a 9-bromoanthracene like phase, while (1) + (2) mixtures only form a single phase. Moreover, experimental studies of the two systems suggest that the (1) + (2) system is in a thermodynamically lower energy state than the (1) + (3) system.
authors: Brown University Department of Chemistry, Providence, RI USA 02912.
authors: Jinxia
authors: J
authors: Fu
authors: Eric M
authors: EM
authors: Suuberg
keywords: 2-bromoanthracene; 9-bromoanthracene; anthracene; polycyclic aromatic compound; thermochemical behavior; vapor pressure