The heteroleptic tetravalent cerium complex [Ce(OiPr)3{N(SiMe3)2}]2 was synthesised by treating ceric ammonium nitrate (CAN) sequentially with sodium isopropoxide and lithium bis(trimethylsilyl)amide in THF. The trivalent ate complex [Ce(OiPr)2{N(SiMe3)2]2}][Li(thf)2] was also isolated from these reaction mixtures. A transsilylamination reaction of [Ce(OiPr)3{N(SiMe3)2}]2 with tetramethyldisilazane produced a considerable amount of homoleptic Ce[N(SiHMe2)2]4. The polymeric complex [Li2Ce2(OiPr)10(1,4-dioxane)]n was isolated as an additional ligand redistribution product. When tetravalent complexes Ce[N(SiHMe2)2]4, Ce[N(SiMe3)2]3Cl and Cp3CeCl were allowed to react with samples of periodic mesoporous silica MCM-41, Ce(IV) hybrid materials were produced. All hybrid materials were characterised via N2 physisorption, elemental analysis and DRIFT spectroscopy.
Dalton Transactions
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