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The isobaric melting and boiling diagrams for the systems: dimethyldichlorosilane/pyridine and 2,2-dichloropropane/pyridine are reproduced. The existence of the incongruently melting addition compounds (CH3)2SiCl2 · (Pyridine)2 and [(CH3)2CCl2]3 · Pyridine could be proved. Some measurements of the molar volume of mixtures of pyridine and dimethyldichlorosilane, and pyridine and 2,2-dichloropropane are reported. For both systems the molar excess volume has been calculated as a function of the mole fractions.
A phase equilibrium study of the systems dimethyldichlorosilane with 2.4-lutidine and 2.6-lutidine is presented with evidence for the existence of the incongruently melting compounds 2.6-lutidine · Me2SiCl2, (2.6-lutidine)2 · Me2SiCl2 and the congruently melting compound 2.4-lutidine · Me2SiCl2.