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has been cited by the following article:

• TITLE: SnIV and ZrIV Compounds of a C3-Symmetric Ligand with Amine [ONN] and [ONNO] Coordination Sites

  AUTHORS: Carolina von Eßen, Iris M. Oppel

  KEYWORDS: Reduction, Triaminoguanidinium, [ONN]/[ONNO] Binding Pockets, SnIV Complex, ZrIV Complex

  JOURNAL NAME: International Journal of Organic Chemistry, Vol.7 No.4, November 24, 2017

  ABSTRACT: 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.