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首页> 外文期刊>Polyhedron: The International Journal for Inorganic and Organometallic Chemistry >Structures of Co, Pd and Ni complexes with iminopyridine ligands having an hydroxymethyl or acrylate pendant group
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Structures of Co, Pd and Ni complexes with iminopyridine ligands having an hydroxymethyl or acrylate pendant group

机译:Co,Pd和Ni配合物与具有羟甲基或丙烯酸酯侧基的亚氨基吡啶配体的结构

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摘要

Co(II), Pd(II) and Ni(II) complexes with iminopyridine ligands have different coordination structures in the solid state, depending on the metal, pendant group of the pyridyl ring and recrystallization conditions. The iminopyridine ligand having an acrylate group, Ar-N=CH-2,6-C5H3N-CH2-OCO-CH=CH2 (L-1: At = 2,6-diisopropylphenyl), forms a Co(II) complex whose metal center has a trigonal pyramidal coordination with two chloride ligands and an N,N'-bidentate ligand L-1. Both L-1 and the iminopyridine ligand with a CH2OH pendant on the pyridyl ring, Ar-N=CH-2,6-C5H3N-CH2-OH (L-2: Ar = 2,6-diisopropylphenyl), coordinate to the PdCl2 moiety, giving complexes with a square-planar coordination. The reaction of L-1 with [NiBr2(H2O)(3)] and recrystallization of the products forms crystals which contain mono- and dinuclear complexes with aqua ligands and the N,N'-bidentate ligand. L-2 is coordinated to the Ni(II) center as an N,N',O-tridentate ligand. Recrystallization of the products of the reaction of L-2 with [NiBr2(H2O)(3)] with and without excess H2O in the solution yields crystals of the cationic octahedral complex with two aqua ligands [NiBr(H2O)(2)(L-2)]Br and the neutral square pyramidal complex [NiBr2(L-2)], respectively.
机译:具有亚氨基吡啶配体的Co(II),Pd(II)和Ni(II)配合物在固态下具有不同的配位结构,具体取决于金属,吡啶基环的侧基和重结晶条件。具有丙烯酸基团Ar-N = CH-2,6-C5H3N-CH2-OCO-CH = CH2(L-1:At = 2,6-二异丙基苯基)的亚氨基吡啶配体形成Co(II)络合物,其金属中心具有由两个氯化物配体和一个N,N'双齿配体L-1组成的三角锥体配位。 L-1和在吡啶环上带有CH2OH侧基的亚氨基吡啶配体(Ar-N = CH-2,6-C5H3N-CH2-OH(L-2:Ar = 2,6-二异丙基苯基))均与PdCl2配位部分,使配合物具有方形-平面配位。 L-1与[NiBr2(H2O)(3)]的反应和产物的重结晶形成晶体,该晶体包含具有水配体和N,N'-双齿配体的单核和双核配合物。 L-2作为N,N',O-三齿配体与Ni(II)中心配位。 L-2与[NiBr2(H2O)(3)]的反应产物在溶液中有或没有过量H2O的情况下重结晶,生成带有两个水配体[NiBr(H2O)(2)(L)的阳离子八面体络合物的晶体-2)] Br和中性方形金字塔络合物[NiBr2(L-2)]。

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