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N-o-tolyl-2-hydroxy-1-naphthaldimine and its Ni-II complex. Conformational changes of free ligand by chelatation

机译:N-邻甲苯基-2-羟基-1-萘二胺及其Ni-II配合物。螯合作用使游离配体的构象变化

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The main scope of the paper deals with keto/amine-enol/imine tautomerism in the solid state of an N-aryl substituted naphthaldimine and conformational changes of this ligand after coordinating to the nickel atom. The N-o-tolyl-2-hydroxy-1-naphthaldimine (I) crystallizes in the orthorhombic space group P 2(1)2(1)2(1) with cell dimensions a = 7.8641(4), b = 12.712(1), c = 13.853(1) Angstrom and corresponding bis-bidentate nickel complex (II) in the monoclinic space group P 2(1)/c and unit cell dimensions a = 7.436(3), b = 22.050(5), c = 8.643(4) Angstrom, beta = 95.05(6)degrees. In the nonplanar molecule of (I) the presence of the enol tautomer is found. In (II) the metal atom has the characteristic square-planar coordination with Ni-II on crystallographically imposed inversion centers. Two naphthaldimine moieties are not coplanar showing stepped conformation with step height 1.034 Angstrom. [References: 24]
机译:本文的主要范围涉及在N-芳基取代的萘二胺的固态下的酮/胺-烯醇/亚胺互变异构现象,以及与镍原子配位后该配体的构象变化。 No-tolyl-2-hydroxy-1-naphthaldimine(I)在斜方晶空间群P 2(1)2(1)2(1)中结晶,晶胞尺寸为a = 7.8641(4),b = 12.712(1) ,c = 13.853(1)埃和单斜空间群P 2(1)/ c中的相应双齿镍配合物(II),晶胞尺寸a = 7.436(3),b = 22.050(5),c = 8.643(4)埃,贝塔= 95.05(6)度。在(I)的非平面分子中,发现了烯醇互变异构体的存在。在(II)中,金属原子在结晶施加的反转中心上具有与Ni-II的特征性的平面-平面配位。两个萘二胺部分不是共面的,显示出台阶高度为1.034埃的台阶状构象。 [参考:24]

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