Two-Dimensional Heteronuclear Coordination Polymers Constructed by Cyanide and 3-(2-Aminoethyl)pyridine Ligands
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Two‑Dimensional Heteronuclear Coordination Polymers Constructed by Cyanide and 3‑(2‑Aminoethyl)pyridine Ligands Güneş Süheyla Kürkçüoğlu1 · Okan Zafer Yeşilel2 · Elvan Sayın3 · Onur Şahin4 Received: 10 May 2020 / Accepted: 24 August 2020 © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract Two new heteronuclear (Ni/Cd and Pd/Cd) 2D coordination polymers formulated as namely {[Cd(μ-3aepy)2Ni(μCN)2(CN)2]⋅2H2O}n (1) and [Cd(3aepy)Pd(μ4-CN)4]n (2) (3aepy = 3-(2-aminoethyl)pyridine) were obtained and determined using different techniques (FT-IR and Raman spectroscopies, single crystal X-ray diffraction, elemental, SEM–EDX and thermal analyses). Single crystal X-ray study of the complexes revealed that the Ni(II) and Pd(II) ions are coordinated with four cyanide-carbon atoms in square planar geometries. The Cd(II) ions are bridged by 3aepy ligands to generate [Cd2(3aepy)2]2+ cation and adjacent cations are further linked to cyanide ligands from [Ni(μ-CN)4]2− anion, generating corrugated rectangular grid-like 2D sheets in 1. Whereas, the Cd(II) and Pd(II) ions are bridged by cyanide ligands, generating corrugated rectangular grid-like 2D sheets in 2. The Cd1 is possessed the distorted octahedral coordination geometry with six nitrogen atoms from two 3aepy and four cyanide ligands. The Cd2 is coordinated by four nitrogen atoms from cyanide ligands to form a square-planar geometry. Furthermore, the most remarkable properties of the complexes are the existence of the intermolecular C–H⋯M interactions between M(II) and hydrogen atoms of the 3aepy ligands (M(II) = Ni and Pd). Keywords Tetracyanonickelate(II) complex · Tetracyanopalladate(II) complex · 3-(2-aminoethyl)pyridine complex · Cyanide complex · C–H⋯Ni interaction · C–H⋯Pd interaction
1 Introduction Cyanide complexes have a number of well-studied structural and functional building blocks that they can use to create larger functional architectures. Brief bridging pseudohalide ligands such as cyanides, azides and nitrile donors are versatile ligands that can connect transition metal ions in diverse Electronic supplementary material The online version of this article (https://doi.org/10.1007/s10904-020-01724-1) contains supplementary material, which is available to authorized users. * Güneş Süheyla Kürkçüoğlu [email protected] 1
Department of Physics, Faculty of Science and Letters, Eskişehir Osmangazi University, 26040 Eskisehir, Turkey
2
Department of Chemistry, Faculty of Sciences and Letters, Eskişehir Osmangazi University, 26040 Eskisehir, Turkey
3
Eskişehir Certification Directorate, Turkish Standards Institution, 26170 Eskisehir, Turkey
4
School of Health, Department of Occupat Health & Safety, Sinop University, 57000 Sinop, Turkey
ways in the solid state [1]. Tetracyanometallate anions (a tetracyanometallate anion is centered by a divalent d8 transition metal: Ni, Pd or Pt) are suitable building blocks as the tetracyanometallate anion with auxiliary ligands and thus to form molecular and various (1D, 2D and 3D)
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