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Hafniumkomplexe mit reduzierten Arenen der Formel [K(L)][Hf(Xy‐N3N)(Aren)] (Xy‐N3N={(3,5‐Me2C6H3)NCH2CH2}3N3−, L=THF, 18‐Krone‐6; Ar=C10H82−, C14H102−) ahmen die Chemie von Hafnium in seiner formalen Oxidationsstufe +II nach. Alle Verbindungen wurden nach Reduktion des Chloridokomplexes [HfCl(Xy‐N3N)(THF)] mit zwei Äquivalenten Kaliumnaphthalinid oder ‐anthracenid erhalten. Die reduzierende Natur...
Eine bemerkenswerte Balance zwischen Nucleophilie und Basizität hebt Bis(allyl)calcium von Organolithium‐ und Organomagnesiumreagentien ab. Pyridin reagiert unter regioselektiver 1,4‐Insertion in die Calcium‐Allyl‐Bindung von Bis(allyl)calcium. Die resultierenden Calcium‐4‐Allyl‐1,4‐dihydropyridyl‐Komplexe können leicht in die entsprechenden N‐geschützten 1,4‐Dihydropyridine überführt werden.
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