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In accordance with United Nations General Assembly resolution, the year 2019 was proclaimed the International Year of the Periodic Table of Chemical Elements. Rare-earth elements were discovered during the time of the Periodic System development. In the past few decades, their compounds have attracted great interest due to their unique reactivity. This review covers recent achievements in the field of intermolecular hydrophosphination of alkenes, dienes and alkynes, which is catalyzed by rare earth and alkaline-earth metal complexes. Catalytic hydrophosphination reaction is the addition of an P—H bond to С—С multiple bonds, and offers an efficient and elegant synthetic approach to production of the organophosphorus compounds widely used in industrial synthesis, pharmaceuticals, agrochemistry, and other areas. The high values of the ionic radii of rare earth and alkaline-earth metals in combination with the Lewis acidity provide their compounds with a pronounced tendency to complex formation and, accordingly, high coordination numbers. Due to high reactivity of M—E (E = C, H, N, P) bonds, ease of Ln—P ı-bond metathesis and multiple C—C bond insertions, these compounds offer new prospects for the catalysis of the alkenes and alkynes hydrophosphination. Therefore, complexes of non-toxic and relatively abundant in nature rare earth and alkaline earth metals can be a cheaper and more effective alternative to compounds of late transition metals in the catalysis of the C—P bond formation.

This contribution has a historiographical nature and is devoted to the interpretations of the esoteric content of Dante's works made by British and Russian scholars from the middle of the nineteenth to the second half of the twentieth century. In particular, the meaning of the British tradition of interpreting Dante's esotericism – from George MacDonald to C.S. Lewis, with a special focus on Charles Williams – is here explored. The neo-Romantic theology of Williams is analyzed along with its rigid connection between the metaphysics of love and the doctrine of Empire. This connection, in fact, makes it possible to compare Williams' achievements with the later works of Guido de Giorgio and Romano Guardini. In this regard, Williams' interpretation of Beatrice image appears to be close to Sophiology. The main achievements of Western European studies of Dante's esoteric heritage are then compared with the contributions of the Russian specialists. The role of Rev. Georgy Florovsky, who was interested in Dante's metaphysics of the Empire and was the first to introduce Williams' works among Russian authors, is highlighted. Particular attention is paid to Rev. Pavel Florensky's "Imaginary Numbers in Geometry" – a work that was ahead of its times both in approaching the "Divine Comedy" from a cosmological point of view and in making a unique attempt of interpreting its physical and mathematical structure. Finally, this article considers the works of the late Soviet (1960s – 80s) and post-Soviet academic scholars, who reexamined a number of esoteric issues in Dante's output. The author concludes that – unlike what happened in Italy and in France – both in Great Britain and in Russia it is not possible to speak of a historiographical continuity within the studies on Dante's esotericism. However, this fact does not prevent from emphasizing the outstanding achievements of some individual Russian, English, and Scottish scholars.

The article is devoted to a comprehensive study of the development of the doctrine of abuse of law in European countries. Particular attention is paid to the civil legislation of Germany, France and Switzerland. The author traces the formation of abuse of law in the European countries studied. Particular attention is paid to the French law school, since it is she who holds the leading position in the development and clarification of the doctrine of abuse of law. The article examines the position of Lewis Joserand, thanks to whose work in France the problems of the consequences of abuse of the law were attracted attention. The author refers to the approach of the Roman law system to the category under study. The article compares the approaches of French, German and Swiss legislation to the problem of abuse of law, shows similarities and differences. The author analyzes the history of the development of abuse of law in three European countries, which will be of interest to specialists in the field of civil law, the history of foreign law ; Статья посвящена комплексному исследованию развития доктрины злоупотребления правом в европейских странах. Особое внимание уделено гражданскому законодательству Германии, Франции и Швейцарии. Автор прослеживает становление злоупотребления правом в исследуемых европейских странах. Особое внимание уделено французской правовой школе, так как именно она занимает ведущую позицию в развитии и прояснении доктрины злоупотребления правом. В статье рассматривается позиция Люисса Жозеранда, благодаря работам которого во Франции к проблемам последствий злоупотребления правом было привлечено внимание. Автор обращается к подходу системы римского права к изучаемой категории. В статье сравниваются подходы французского, немецкого и швейцарского законодательства к проблеме злоупотребления правом, показаны сходства и различия. Автором проведен анализ истории становления злоупотребления правом в трех европейских странах, который будет интересен специалистам в области гражданского права, истории зарубежного права