Antimony compounds that feature multidentate aryloxide ligands, namely [η4âN(o-C6H4O)3]Sb(OSMe2), [η3-N(o-C6H4OH)(o-C6H4O)2]Sb}2(µ2-O)}2, and [η3-PhN(o-C6H4O)2]Sb}4(µ3-O)2 have been synthesized from N(o-C6H4OH)3 and PhN(o-C6H4OH)2 and structurally characterized by X-ray diffraction. While [η4-N(o-C6H4O)3]Sb(OSMe2) exists as a discrete mononuclear species, the oxo complexes [η3-N(o-C6H4OH)(o-C6H4O)2]Sb}2(µ2-O)}2 and [η3-PhN(o-C6H4O)2]Sb}4(µ3-O)2 are multinuclear. Specifically, the dinuclear fragment [η3-N(o-C6H4OH)(o-C6H4O)2]Sb}2(µ2-O)} exists in a dimeric form due to the bridging oxo ligand participating in an intermolecular hydrogen bonding interaction, while the dinuclear fragment [η3-PhN(o-C6H4O)2]Sb}2(µ-O) exists in a dimeric form due to the bridging oxo ligand serving as a donor to the antimony of a second fragment. The structures of [η3-N(o-C6H4OH)(o-C6H4O)2]Sb}2(µ2-O)}2 and [η3-PhN(o-C6H4O)2]Sb}4(µ3-O)2, therefore, indicate that an oxo ligand bridging two SbIII centers is sufficiently electron rich to serve as both an effective hydrogen bond acceptor and as a ligand for an additional SbIII center.
由 N(邻- H)3和PhN(邻-
C6H4O)2合成了具有多叉芳基氧
配体的
锑化合物,即[δ-4âN(邻- )3]Sb(OSMe2)、[δ-3-N(邻- H)(邻- )2]Sb}2(µ2-O)}2、和[δ-3-PhN(o- )2]Sb}4(µ3-O)2 合成,并通过 X 射线衍射进行了结构表征。虽然[δ-4-N(o- )3]Sb(OSMe2)以离散的单核形式存在,但[δ-3-N(o- H)(o- )2]Sb}2(µ2-O)}2和[δ-3-PhN(o- )2]Sb}4(µ3-O)2的氧配合物却是多核的。具体来说,双核片段[δ-3-N(o- H)(o- )2]Sb}2(µ2-O)}以二聚体形式存在,这是因为桥接的氧
配体参与了分子间氢键相互作用、而双核片段[δ-3-PhN(o- )2]Sb}2(µ-O)则以二聚体形式存在,这是因为桥接的氧
配体是第二个片段中
锑的供体。因此,[δ-3-N(o- H)(o- )2]Sb}2(µ2-O)}2 和[δ-3-PhN(o- )2]Sb}4(µ3-O)2 的结构表明,连接两个 SbIII 中心的氧
配体具有足够丰富的电子,既可作为有效的氢键受体,又可作为另一个 SbIII 中心的
配体。