The hydroxyl NMR frequencies for t-butanol, phenol, and methanol have been measured as functions of concentration in carbon tetrachloride solution. The curves obtained were found to fit well to theoretical curves calculated for monomer-trimer equilibrium for t-butanol and phenol with K3=5.60 l2/M2 and 4.78 l2/M2, respectively and a monomer-tetramer curve with K4=28.4 l3/M3 for methanol. The data of Becker et al.1 on the ethanol-carbon tetrachloride system have been fitted to theoretical curves for monomer-trimer K3=5.19 l2/M2 and monomer-tetramer K4=44.9 l3/M3.
Densities, excess volumes and heats of mixing, heat capacities, refractive indices and viscosities of various N‐methyl‐2‐pyrrolidinone (NMP)‐water mixtures are reported. The excess volumes and heat of mixing are negative and show their greatest deviations from ideality at 0.3 ‐ 04 mole fraction NMP. The viscosity of the system passes through a maximum in the same region of solvent composition. These data indicate strong interaction between NMP and water and suggest the existence of transient polymeric species of the type — (NMP · 2H2O)n̄.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.