Electric Literature of 33100-27-5, Children learn through play, and they learn more than adults might expect. Science experiments are a great way to spark their curiosity, get their minds active, and encourage them to do something that doesn’t involve a screen. 33100-27-5, C10H20O5. A document type is Article, introducing its new discovery.
(K-18-crown-6)4[Ta4O6Cl12] · 12 CH2Cl2 was obtained from a reaction of tantalum pentachloride, K2S5 and 18-crwon-6 in dichlormethane. According to its crystal structure analysis it is tetragonal (space group I42d) and contains [Ta4O6Cl12]4- ions that have an adamantane-like Ta4O6 skeleton. Each K+ ion is coordinated by the oxygen atoms of the crown ether molecule from one side and with three Cl atoms of one [Ta4O6Cl12]4- ion from the opposite side. (PPh4)2[Ta2OCl10] · 2 CH3CN was a product from PPh4Cl and TaCl5 in acetonitrile in the presence of Na2S4. Its crystals are monoclinic (space group P21/c) and contain centro-symmetric [Ta2OCl10]2- ions having a linear Ta-O-Ta grouping with short bonds (Ta-O 189pm). TaCl5 and H2S formed a solid substance (TaSCl3) from which a small amount of (PPh4)2[Ta2OCl9]2 · 2 CH2Cl2 was obtained by the reaction with PPh4Cl in CH2Cl2. The anions in the monoclinic crystals (space group P21/n) consist of two Ta2OCl9- units which are joined by chloro bridges; each Ta2OCl9- unit has a nearly linear Ta-O-Ta group with differing bond lengths (179 and 202 pm). The oxygen in the compounds probably was introduced by traces of water in the crown ether, acetonitrile or H2S, respectively.
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