Differing coordination environments in transition metal derivatives of 1,8-bis(silylamido)naphthalene ligands.

Differing coordination environments in transition metal derivatives of 1,8-bis(silylamido)naphthalene ligands.
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1,8-双(甲硅烷基酰胺基)萘配体的过渡金属衍生物中的不同配位环境。

DOI:
10.1021/ic901745v
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发表时间:
2009
影响因子:
4.6
通讯作者:
Blake AJ
Blake AJ
中科院分区:
化学2区
文献类型:
--
作者:
Blake AJ

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报道了四种具有空间要求的1,8-二(硅酰胺基)萘配体的低配位过渡金属酰胺配合物。1摩尔当量的1,8-C10 H6(NLiSiMe 3)2与ZnCl 2反应生成结构经鉴定的二聚体[1,8-C10 H6(NSiMe 3)2 Zn]2(1),其中1,8-双(甲硅烷基氨基)萘部分既充当螯合配体又充当桥接配体。使用三异丙基甲硅烷基取代的配体1,8-C10 H6(NSiiPr 3)2研究了增加配体的空间需求对所得过渡金属络合物的影响。1摩尔当量的1,8-C10 H6(NLiSiiPr 3)2与ZnCl 2或FeCl 2(THF)1.5反应,分别得到1,8-C10 H6(NSiiPr 3)2 M(μ-Cl)Li(THF)3(M = Zn,2; M = Fe,3); ClLi(THF)3部分与金属中心的配位在d区元素的配位化学中是一种罕见的结构基序。类似地,1,8-C10 H6(NLiSiiPr 3)2与MnCl 2反应得到混合金属Li−Mn−酰胺配合物1,8-C10 H6(NSiiPr 3)2Li(THF)MnCl(THF)(4),其具有不寻常的LiMnN 2核。
Four low-coordinate transition metal amido complexes featuring sterically demanding 1,8-bis(silylamido)naphthalene ligands are reported. Reaction of one molar equivalent of 1,8-C10H6(NLiSiMe3)2with ZnCl2yields the structurally authenticated dimer [1,8-C10H6(NSiMe3)2Zn]2(1), where the 1,8-bis(silylamido)naphthalene moiety is acting as both a chelating and bridging ligand. The effect on the resulting transition metal complexes of increasing the steric demands of the ligand was investigated, using the triisopropylsilyl-substituted ligand 1,8-C10H6(NSiiPr3)2. Reaction of one molar equivalent of 1,8-C10H6(NLiSiiPr3)2with ZnCl2or FeCl2(THF)1.5yields 1,8-C10H6(NSiiPr3)2M(μ-Cl)Li(THF)3(M = Zn,2; M = Fe,3), respectively; the coordination of the ClLi(THF)3moiety to the metal center in these compounds is a rare structural motif in the coordination chemistry of the d-block elements. Analogous reaction of 1,8-C10H6(NLiSiiPr3)2with MnCl2affords the mixed-metal Li−Mn−amido complex 1,8-C10H6(NSiiPr3)2Li(THF)MnCl(THF) (4) which features an unusual LiMnN2core.