Retrosynthetic approach to the design of molybdenum-magnesium oxoalkoxidesстатья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 2 декабря 2016 г.
Аннотация:The reaction of MoCl5 methanolysis in the presence of magnesium ions was shown to produce an extensive row of heterobimetallic Mg-Mo(v, vi) oxomethoxides of different nuclearity ranging from 4 for [Mg-2(CH3OH)(4)Mo2O2(OCH3)(10)] (1) to 26 for [Mg(DMF)(3)(CH3OH)(3)](2)[Mo22Mg4O48(OCH3)(28)(DMF)(6)] (2) with the latter possessing a ring morphology. Examination of [Mo6O12(OCH3)(16)Mg-4(CH3OH)(6)] (3), [Mo6O12(OCH3)(12)Mg-2(DMF)(4)] (4a), and [Mo6O16(OCH3)(4)Mg-2(DMF)(8)] (3a) X-ray structures revealed the presence of the well known tetranuclear core (Mo4O8(OCH3)(2))(2+) thus similar reactivity patterns leading to their formation were assumed. For convenient synthesis of such heterobimetallic oxoalkoxides, the retrosynthetic approach based on speculative deconstruction of a target molecule onto simpler fragments was suggested and successfully employed. Namely, the reaction of the stoichiometric amounts of appropriately chosen Mo(v), Mo(vi) and Mg2+ synthons led to their assembling resulting in the formation of heterometallic clusters 3, 5a and [Mo6O12(OCH3)(12)Mg-2(CH3OH)(4)]center dot 2CH(3)OH (4b) characterized by means of elemental analysis, UV-Vis, IR spectroscopy, and X-ray crystallography.