Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
Dalton Trans. 2012 Aug 21;41(31):9272-5. doi: 10.1039/c2dt31260c. Epub 2012 Jun 29.
A triptycene-based bis(benzoxazole) diacid ligand H(2)L2(Ph4) bearing sterically encumbering groups was synthesized. Treatment of H(2)L2(Ph4) with Fe(OTf)(3) afforded a C(2)-symmetric trinuclear iron(III) complex, NaFe(3)(L2(Ph4))(2)(μ(3)-O)(μ-O(2)CCPh(3))(2)(H(2)O)(3)(2) (8). The triiron core of this complex adopts the well known "basic iron acetate" structure where the heteroleptic carboxylates, comprising two Ph(3)CCO(2)(-) and two (L2(Ph4))(2-) ligands, donate the six carboxylate bridges. The (L2(Ph4))(2-) ligand undergoes only minor conformational changes upon formation of the complex.
一种基于三联苯的双（苯并恶唑）二羧酸配体 H(2)L2(Ph4)，带有空间位阻基团，已被合成。用 H(2)L2(Ph4)处理 Fe(OTf)(3)，得到一个 C(2)对称的三核铁(III)配合物，NaFe(3)(L2(Ph4))(2)(μ(3)-O)(μ-O(2)CCPh(3))(2)(H(2)O)(3)(2) (8)。该配合物的三铁核采用了众所周知的“碱性醋酸铁”结构，其中杂配位体羧酸酯，包括两个 Ph(3)CCO(2)(-)和两个 (L2(Ph4))(2-)配体，提供了六个羧酸酯桥。在形成配合物时，(L2(Ph4))(2-)配体只发生了微小的构象变化。
