Crystal structure of poly[[di-aqua-tetra-μ2-cyanido-platinum(II)iron(II)] methanol 4/3-solvate]: a three-dimensional Hofmann clathrate analogue

Volodymyr M Hiiuk; Vasyl Mykhailovych; Sergiu Shova; Irina A Golenya; Il'ya A Gural'skiy

doi:10.1107/S2056989022000573

Crystal structure of poly[[di-aqua-tetra-μ₂-cyanido-platinum(II)iron(II)] methanol 4/3-solvate]: a three-dimensional Hofmann clathrate analogue

Acta Crystallogr E Crystallogr Commun. 2022 Jan 25;78(Pt 2):216-219. doi: 10.1107/S2056989022000573. eCollection 2022 Jan 1.

Authors

Volodymyr M Hiiuk^{1

2

3}, Vasyl Mykhailovych⁴, Sergiu Shova⁵, Irina A Golenya¹, Il'ya A Gural'skiy^{1

2}

Affiliations

¹ Department of Chemistry, Taras Shevchenko National University of Kyiv, 64 Volodymyrska St, 01601 Kyiv, Ukraine.
² UkrOrgSyntez Ltd, 67 Chervonotkatska St, 02094 Kyiv, Ukraine.
³ Faculty of Natural Sciences, National University of Kyiv-Mohyla Academy, 2 Skovorody St, 04070 Kyiv, Ukraine.
⁴ Faculty of Electrical Engineering and Computer Science & Research Center, MANSiD, Stefan cel Mare University, 13 Universitatii St., 720229 Suceava, Romania.
⁵ Department of Inorganic Polymers, "Petru Poni", Institute of Macromolecular Chemistry, Romanian Academy of Science, Aleea Grigore Ghica Voda 41-A, Iasi 700487, Romania.

Abstract

In the title polymeric coordination compound, {[FePt(CN)₄(H₂O)₂]·1.33CH₃OH} _n , the Fe^II cation (site symmetry 4/mm.m) is coordinated by the N atoms of four cyanide anions (CN^-) and the O atoms of two water mol-ecules, forming a nearly regular [FeN₄O₂] octa-hedron. According the Fe-N and Fe-O bond lengths, the Fe^II atom is in the high-spin state. The cyanide anions act in a bridging manner to connect the Fe^II and Pt^II atoms. The [Pt(CN)₄]^2- moieties (Pt with site symmetry 4/mm.m) have a perfect square-planar shape. The latter anion is located perpendicular to the FeN₄ plane, thus ensuring the creation of a three-dimensional framework. The crystal structure features methanol solvent mol-ecules of which 4/3 were located per Fe^II cation. These solvent mol-ecules are located in hexa-gonal pores; they inter-act with coordinating water mol-ecules through weak hydrogen bonds. Other guest mol-ecules could not be modelled in a satisfactory way and their contribution to the scattering was removed by a mask procedure.

Keywords: clathrate; coordination compounds; crystal structure; cyanido ligand; iron(II); platinum.

Grants and funding

This work was funded by Ministry of Education and Science of Ukraine grant 19BF037-01M; H2020 Marie Skłodowska-Curie Actions grant 734322; Yukhymenko Family Endowment Fund.