MgAl,Se4, MgIn,Se4 (beide R3m‐Cäv, Z=3) und Mg2Al2Se5 (Päm, ‐D2d, Z=3) werden durch Erhitzen (1000°, 12 h) stöchiometrischer Gemenge der Elemente bei 0,1 Torr in Quarzampullen und 12stündigem Abkühlen dargestellt und analytisch gesichert.
020ChemInform Abstract The title compound has been obtained in 70% yield (based on Ga) from the hydrothermal reaction of tetramethoxosilane, NMe4OH, and Ga2O3 (autoclave, 180 rc C, 5 d). The structure of NMe4GaSi5O12 is cubic body-centered, a = 0.8975 nm. The compound is further characterised using IR spectroscopy and DTA.
Die Diels‐Alder‐Addition des Tetraens (I) an Doppelbindungsdienophile wie (II) bzw. (VI) liefert ausschließlich [4+2]‐Cycloaddukte wie (III) bzw. (VII) [analoge Darstellung der Cycloaddukte (IV), (V), (VIII)].
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