Ebulliometric measurement

Silva, A.M., and L. A. Weber, "Ebulliometric Measurement of the Vapor Pressure of 1-Chloro-l,l-Difluoroethane and 1,1-Difluoro Ethane, J. Chem. Eng. Data, 38, 644-646 (1993). 

The compounds Ln(C5H5)2Cl also have been made only with the lanthanides above samarium (772). These compounds are stable in the absence of air and moisture, sublime near 200 °C, are insoluble in non-polar solvents, and exhibit room temperature magnetic moments near the free ion values (772, 113). The chloride ion may be replaced by a variety of anions including methoxide, phenoxide, amide and carboxylate. Some of these derivatives are considerably more air-stable than the chloride — the phenoxide is reported to be stable for days in dry air. Despite their apparent stability, little is known about the physical properties of these materials. The methyl-substituted cyclopentadiene complexes are much more soluble in non-polar solvents than the unsubstituted species. Ebulliometric measurements on the bis(methylcyclopentadienyl)lanthanide(III) chlorides indicated the complexes are dimeric in non-coordinating solvents (772). A structmre analysis of the ytterbium member of this series has been completed (714). The crystal and molecular parameters of this and related complexes are compared in Table 5. 

Several V02+ complexes with (107) and (108) derived from dibenzoylmethane or pyrrole-2-carboxyaldehyde and several amines (taurine, anthranilic acids, /I-alanine) were formulated as [VO(SB)(H2O)2] 780 783 it was proposed that these SBs behave as tridentate ligands and assume a monomeric structure on the basis of fiia and ebulliometric measurements in dioxane. A pyridine adduct [VO(PE)(py)2] was also obtained where PE is the SB (108 R—O = CH2CH2SOj).782... 

Weber, L.A. (1992) Ebulliometric measurement of the vapor pressures of R123 and R141b. Fluid Phase Equil. 80, 141-148. 

Ebulliometric Measurements, New York, 1945, 1 and in Weissberger, Physical Methods of Organic Chemistry, New York, 1945,1, 47. 

Silva, A.M., and L.A. Weber, "Ebulliometric Measurement of the Vapor Pressure... 

The data reduction of ebulliometric measurements can be made either by using Equations [4.4.22] or by applying the relation for the boiling point elevation of a binary mixture ... 

Kato, M. Tanaka, H. Ebulliometric measurement of vapor-liquid equihbiia for four binary systems methanol + sihcon tetramethoxide, methanol + silicon tetraethoxide, ethanol -l- sihcon tetramethoxide, and ethanol -l- silicon tetraethoxide J. Chem. Eng. Data 1989,34, 206-209... 

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