Two novel coordination complexes, namely, dichlorido[3,5-dimethyl-1-(pyridin-2-yl-κN)-1H-pyrazole-κN²]zinc(II), [ZnCl₂(C₁₀H₁₁N₃)], 1, and aquachloridobis[3,5-dimethyl-1-(pyridin-2-yl-κN)-1H-pyrazole-κN²]nickel(II) chloride monohydrate, [NiCl(C₁₀H₁₁N₃)(H₂O)]Cl·H₂O, 2, have been synthesized. The crystal structure analyses revealed that complexes 1 and 2 are mononuclear and have ZnN₂Cl₂ distorted tetrahedral and NiN₄OCl distorted octahedral structures, respectively. Complex 1 displays a dimer in the crystal structure, while complex 2 forms a chain along the [010] direction. The fluorescence properties of both complexes were also investigated. A search of the Cambridge Structural Database for other complexes of the ligand 3,5-dimethyl-1-(pyridin-2-yl)-1H-pyrazole (L) shows that there exist different coordination polyhedra with different arrangements as monomers, dimers and polycyclic structures. Here it has also been demonstrated that there is a relationship between the crystal packing and the fluorescence properties of Zn^II and Cd^II complexes of L.

中文翻译：

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3,5-二甲基-1-(吡啶-2-基)-1H-吡唑的锌(II)和镍(II)配合物：荧光与晶体堆积的关系

两种新型配位配合物，即二氯[3,5-二甲基-1-(pyridin-2-yl-κ N )-1 H-吡唑-κ N ² ]锌(II)、[ZnCl ₂ (C ₁₀ H ₁₁ N ₃ )]、1和氯化水双[3,5-二甲基-1-(吡啶-2-基-κ N )-1 H-吡唑-κ N ² ]氯化镍(II)一水合物，[NiCl(C ₁₀合成了H ₁₁ N ₃ )(H ₂ O)]Cl·H ₂ O, 2。晶体结构分析表明配合物1和2是单核的并且分别具有ZnN ₂ Cl ₂畸变四面体和NiN ₄ OCl畸变八面体结构。配合物1在晶体结构中显示二聚体，而配合物2沿 [010] 方向形成链。还研究了这两种配合物的荧光特性。在剑桥结构数据库中搜索配体 3,5-二甲基-1-(吡啶-2-基)-1 H-吡唑 ( L ) 的其他配合物)表明存在不同排列的配位多面体，如单体、二聚体和多环结构。这里还证明了晶体堆积与L的 Zn ^II和 Cd ^II配合物的荧光特性之间存在关系。