Sn<sup>IV</sup>and Zr<sup>IV</sup>Compounds of a <i>C</i><sub>3</sub>-Symmetric Ligand with Amine [ONN] and [ONNO] Coordination Sites

• 作者: Carolina von E?en Iris M. Oppel
• 来源期刊: 有机化学国际期刊(英文)
• 学科: 化学
• 关键词: Reduction Triaminoguanidinium [ONN]/[ONNO] Binding Pockets SnIV COMPLEX ZrIV COMPLEX
• 年，卷（期）: 2017,（4）
• 页码范围: 325-335
• 页数: 11页
• 分类号: O6

摘要

This contribution describes the synthesis and structural characterization of a triaminoguanidinium (TAG)-based ligand [H6(OMe)3Limin]BF4 (1) containing imine bonds (Limin) and its reduction with a dimethylamino borane complex to the corresponding amine compound (Lamin)[H9(OMe)3Lamin]OTs (2). In solution, both ligands are C3-symmetric but crystal structures show the great influence of the reduction on the molecular structure. We show that the planar imine ligand is converted to a highly flexible compound which has nine potential coordination sites, three phenoxy and six amine donors, for binding metal ions. First solid state structures of 1:1 (metal:ligand) coordination compounds with SnIV and ZrIV are presented. SnIV exhibits an octahedral coordination sphere and is bound in a facial [ONN] coordination pocket. ZrIV is pentagonal bipyramidal coordinated and the ligand stabilizes this with its’ [ONNO] binding sites.