Discrete Magnesium Hydride Aggregates: A Cationic Mg13H18 Cluster Stabilized by NNNN‐Type Macrocycles |
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| Authors: | Daniel Martin Dr Klaus Beckerle Silvia Schnitzler Dr Thomas P Spaniol Prof?Dr Laurent Maron Prof?Dr Jun Okuda |
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| Institution: | 1. Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, 52056 Aachen (Germany);2. Université de Toulouse et CNRS, INSA, UPS, CNRS;3. UMR 5215 LPCNO, 135 avenue de Rangueil, 31077 Toulouse (France) |
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| Abstract: | Large magnesium hydride aggregates Mg13(Me3TACD)6(μ2‐H12)(μ3‐H6)]A]2 ((Me3TACD)H=1,4,7‐trimethyl‐1,4,7,10‐tetraazacyclododecane; A=AlEt4, AlnBu4, B{3,5‐(CF3)2C6H3}4) were synthesized stepwise from alkyl complexes Mg2(Me3TACD)R3] (R=Et, nBu) and phenylsilane in the presence of additional MgII ions. The central magnesium atom is octahedrally coordinated by six hydrides as in solid α‐MgH2 of the rutile type. Further coordination to six magnesium atoms leads to a substructure of seven edge‐sharing octahedra as found in the hexagonal layer of brucite (Mg(OH)2). Upon protonolysis in the presence of 1,2‐dimethoxyethane (DME), this cluster was degraded into a tetranuclear dication Mg2(Me3TACD)(μ‐H)2(DME)]2A]2. |
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| Keywords: | cluster compounds hydrides hydrogen macrocylic ligands magnesium |
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