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Monomeric lithium triazapentadienyl complexes

机译:单体三氮杂戊二烯基锂络合物

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摘要

Treatment of 1,3,5-triazapentadienes [N{(C3F7)C(Mes)N}(2)]H and [N{(C3F7)C(Dipp)N}(2)]H (where Mes = 2,4,6-Me3C6H2; Dipp = 2,6-(Pr2C6H3)-C-i) with n-BuLi in hexane, followed by the crystallization from hexane-THF mixture afforded the corresponding lithium 1,3,5-triazapentadienyl complexes as their THF solvates. X-Ray crystallographic analyses revealed that [N{(C3F7)C(Mes)N}(2)]Li(THF)(2) and [ N{( C3F7) C( Dipp) N} 2] Li( THF) are monomeric in the solid state. [ N{( C3F7) C( Mes) N} 2] Li( THF) 2 has a four-coordinate lithium center with a distorted tetrahedral geometry, and features a boat-shaped C2N3Li metallacycle. [N{(C3F7)C(Dipp)N}(2)]Li(THF) has a three-coordinate lithium atom and a planar, U-shaped C2N3 ligand backbone. The synthesis, solid-state structure, and H-1 and F-19 NMR spectroscopic details of [N{(C3F7)C(Mes)N}(2)]H are also reported.
机译:1,3,5-三氮杂戊二烯[N {(C3F7)C(Mes)N}(2)] H和[N {(C3F7)C(Dipp)N}(2)] H的处理(其中Mes = 2, 4,6-Me3C6H2; Dipp = 2,6-(Pr2C6H3)-Ci),在己烷中用正丁基锂,​​然后从己烷-THF混合物中结晶,得到相应的1,3,5-三氮杂戊二烯基锂配合物,为四氢呋喃溶剂化物。 X射线晶体分析表明[N {(C3F7)C(Mes)N}(2)] Li(THF)(2)和[N {(C3F7)C(Dipp)N} 2] Li(THF)为固态单体。 [N {(C3F7)C(Mes)N} 2] Li(THF)2具有四坐标的锂中心,具有扭曲的四面体几何形状,并具有船形C2N3Li金属环。 [N {(C3F7)C(Dipp)N}(2)] Li(THF)具有三个配位的锂原子和一个平面的U形C2N3配体主链。还报道了[N {(C3F7)C(Mes)N}(2)] H的合成,固态结构以及H-1和F-19 NMR光谱学细节。

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