Crystal structure of K[PtCl3 (caffeine)] and its interactions with important nitrogen-donor ligands

Puchta R, Klisurić O, Bugarčić ŽD (2016)

Publication Type: Journal article

Publication year: 2016

Journal

Journal of Coordination Chemistry Taylor & Francis

Book Volume: 69

Pages Range: 735-747

Journal Issue: 5

DOI: 10.1080/00958972.2016.1146257

Abstract

The crystal structure of K[PtCl3(caffeine)] was determined. The coordination geometry around platinum is square-planar formed by N9 of the caffeine ligand and three Cl- ions. The bond lengths and angles of K[PtCl3(caffeine)] were compared with those reported for [PtCl3(caffeine)]- and K[PtCl3(theobromine)]. At the level of the statistical significance of the data we have compared, no differences in the bond distances and angles for any of these compounds were noticed. Weak interactions between K+ and Cl- are responsible for the formation of 1-D polymeric chains in the crystal structure of the complex. The interactions of K[PtCl3(caffeine)] with inosine (Ino) and guanosine-5′-monophosphate (5′-GMP) were studied by 1H NMR spectroscopy at 295 K in D2O in a molar ratio of 1: 1. The results indicate formation of the reaction product [PtCl3(Nu)] (Nu=Ino or 5′-GMP) with the release of caffeine from the coordination sphere of the starting complex. The higher stability of the bond between the Pt(II) ion and Ino or 5′-GMP compared to the stability of the platinum-caffeine bond is confirmed by density functional theory calculations (B3LYP/LANL2DZp) using as models 9-methylhypoxanthine and 9-methylguanine.

Authors with CRIS profile

Ralph Puchta Department Chemie und Pharmazie

Involved external institutions

University of Novi Sad RS Serbia (RS) University of Kragujevac RS Serbia (RS)

How to cite

APA:

Puchta, R., Klisurić, O., & Bugarčić, Ž.D. (2016). Crystal structure of K[PtCl3 (caffeine)] and its interactions with important nitrogen-donor ligands. Journal of Coordination Chemistry, 69(5), 735-747. https://doi.org/10.1080/00958972.2016.1146257

MLA:

Puchta, Ralph, Olivera Klisurić, and Živadin D. Bugarčić. "Crystal structure of K[PtCl3 (caffeine)] and its interactions with important nitrogen-donor ligands." Journal of Coordination Chemistry 69.5 (2016): 735-747.

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