Vapor–Liquid Equilibrium Study of the Monochlorobenzene–4,6-Dichloropyrimidine Binary System

Abstract

The number of newly synthesized and produced organic chemicals has increased extremely quickly. However, the measurements of their physical properties, including their vapor–liquid equilibrium (VLE) data, are time-consuming. It so happens that there is no physical property data about a brand-new chemical. Therefore, the importance of calculating their physicochemical properties has been playing a more and more important role. 4,6-Dichloropyrimidine (DCP) is also a relatively new molecule of high industrial importance with little existing data. Therefore, their measurements and the comparison with the calculated data are of paramount concern. DCP is a widespread heterocyclic moiety that is present in synthetic pharmacophores with biological activities as well as in numerous natural products. Isobaric VLE for the binary system of 4,6-dichloropyrimidine and its main solvent monochlorobenzene (MCB) was measured using a vapor condensate and liquid circulation VLE apparatus for the first time in the literature. Density functional-based VLE was calculated using the COSMO-SAC protocol to verify the laboratory results. The COSMO-SAC calculation was found to be capable of representing the VLE data with high accuracy. Adequate agreement between the experimental and calculated VLE data was acquired with a minimal deviation of 3.0 × 10 –3 , which allows for broader use of the results.

Network Security Protocol Testing Technology Based on Wireless Communication System

“…Although a complete cryptographic algorithm(CA) includes three processes: encryption, transmission, and decryption, the CA itself is mainly concerned with the design of encryption and decryption algorithms. In this paper, we analyze the testing requirements of wireless communication NSPs, and propose a black-box testing scheme for wireless communication NSPs based on consistency testing, which can test the security protocols of wireless communication networks and the pseudo-random numbers used in the protocols, so as to obtain the evaluation of the services and security functions implemented by the security protocols and realize the NSPs of WCSs The study of testing techniques for NSPs in WCSs [3][4].…”

Study on Vapor–Liquid Equilibrium and Microscopic Properties of Glycine + H2O, l-Histidine + H2O, and l-Tryptophan + H2O

“…VLE measurements were performed for both unloaded and CO 2 -loaded amino acid salt (AAS) aqueous solutions potassium salt of sarcosine (KSAR) . Several scholars acknowledge the importance of microscopic interactions in the study of thermodynamics and some of them used COSMO to study such interactions from a thermodynamics perspective. − In addition, the COSMO-SAC calculation was found to be capable of representing the VLE data with high accuracy, which lays a good foundation for the following VLE data . However, previous research on VLE has primarily focused on salt solutions; studies on VLE in amino acid aqueous solutions and its microscopic mechanism have been scant …”

“…13−15 In addition, the COSMO-SAC calculation was found to be capable of representing the VLE data with high accuracy, which lays a good foundation for the following VLE data. 16 However, previous research on VLE has primarily focused on salt solutions; studies on VLE in amino acid aqueous solutions and its microscopic mechanism have been scant. 17 The VLE of three aqueous solutions of amino acids (glycine, L-histidine, and L-tryptophan) was studied in this paper.…”