Table of contents

The published data on phase equilibria in the M–X–X' and M–Al–X ternary systems (M is a Group III-VIII transition metal, X, X' are B, C, N, Si) are surveyed. These systems provide a basis for the directed search for oxygen-free ceramic materials for various purposes. The phase diagrams for the ternary systems are presented; more than two hundred ternary phases formed in these systems are systematised and described for the first time. The typical crystal structures of the ternary compounds and of the phases are considered, the general and distinguishing features of these structures are analysed. It is shown that ternary compounds containing the XM₆ octahedral groups possess homogeneity regions. The bibliography includes 240 references.

The results of studies on the use of sulfenamides in organic synthesis are systematised and generalised. The fields of industrial application of sulfenamides are considered. The bibliography includes 220 references.

The review is devoted to natural unsaturated acyclic acids containing oxygen functions. Compounds of the aceto-genin and propiogenin types containing hydroxy, oxo, and epoxy groups as well as ether, hydrofuran, and hydropyran fragments are considered. Data are given on the biological activities of the acids themselves or of natural compounds whose structural elements are unsaturated acids. The methodology and strategy of the synthesis of both linear unsaturated hydroxy and alkoxy acids and those containing a heterocyclic fragment are discussed. The bibliograhy includes 172 references.