Related Experiment Video
Updated: Jul 20, 2026

Efficient Synthesis of All-Carbon Quaternary Centers via the Conjugate Addition of Functionalized Monoorganozinc Bromides
Published on: May 26, 2019
Heterogeneous association in methanol-carbon tetrachloride mixtures
1CNR, Istituto per i Processi Chimico-Fisici, Sez. Messina, Via La Farina 237, I-98123 Messina, Italy. pieruccini@me.cnr.it
Abstract:
A lattice model developed for the calculation of the equilibrium distribution of molecular clusters in methanol-carbon tetrachloride mixtures is modified in order to account for an entropy component associated to the binding of CCl(4) with the nondonating end of methanol clusters. This entropy contribution is shown to affect significantly the H-bonding energy estimates based on the use of the model for the analysis of both the static dielectric response and the Raman O-H stretching spectra of these mixtures. The agreement with some results from numerical simulations turns out to be improved. In particular, the new value of approximately 6.2 kcal/mol found for the H-bonding energy (to be compared with approximately 3.2 kcal/mol yielded by the previous version of the model) is close to the results of simulation (approximately 5.5 kcal/mol). The H-bonding energy is also estimated by fitting the excess mixing enthalpy with an empirical polynomial expansion, complemented by an association contribution derived from the model. The agreement is good in this case, too.
More Related Videos
11:25Multi-step Preparation Technique to Recover Multiple Metabolite Compound Classes for In-depth and Informative Metabolomic Analysis
Published on: July 11, 2014
09:38Single-throughput Complementary High-resolution Analytical Techniques for Characterizing Complex Natural Organic Matter Mixtures
Published on: January 7, 2019
Related Concept Videos
Heterogeneous Catalysis
Phase Diagrams of Ternary Systems
Mass Spectrometry: Complex Analysis
GC–MS is a powerful hyphenated method commonly used in forensics and environmental...
Regioselectivity of Electrophilic Additions to Alkenes: Markovnikov's Rule
The hydrohalogenation of an unsymmetrical alkene can yield two haloalkane products, depending on which vinylic carbon takes up the halogen. However, one product usually predominates, where hydrogen adds to the vinylic carbon bearing the...
Regioselectivity and Stereochemistry of Acid-Catalyzed Hydration
¹H NMR Chemical Shift Equivalence: Homotopic and Heterotopic Protons