SnIV and ZrIV Compounds of a C3-Symmetric Ligand with Amine [ONN] and [ONNO] Coordination Sites ()
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.
Share and Cite:
Eßen, C. and Oppel, I. (2017) Sn
IV and Zr
IV Compounds of a
C3-Symmetric Ligand with Amine [ONN] and [ONNO] Coordination Sites.
International Journal of Organic Chemistry,
7, 325-335. doi:
10.4236/ijoc.2017.74027.