N,N′-methylenedipyridinium Pt(II) and Pt(IV) hybrid salts: synthesis, crystal and molecular structures of [(C5H5N)2CH2] · [PtCl4] and [(C5H5N)2CH2] · [PtCl6]
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Mahmoud Al-Ktaifani
und
Mwaffak Rukiah
Abstract
The highly insoluble organic-inorganic hybrid ionic compounds N,N′-methylenedipyridinium tetrachloroplatinate(II) [(C5H5N)2CH2] · [PtCl4] and N,N′-methylenedipyridinium hexachloroplatinate(IV) [(C5H5N)2CH2] · [PtCl6] were obtained by the treatment of N,N′-methylenedipyridinium dichloride monohydrate [(C5H5N)2CH2]Cl2 · H2O with K2[PtCl4] or (NH4)2[PtCl6], respectively, in an aqueous solution. Both complexes were isolated, purified, characterised by elemental analysis, and their molecular structures were confirmed by powder X-ray diffraction. The crystal structure of both compounds consists of separated discrete dications [(C5H5N)2CH2]2+ and anions [PtCln]2− (n = 4 or 6). As anticipated, the dications formed a butterfly shape consisting of two pyridine rings bound to the methylene group via their N atoms, while the Pt centre had a square planar geometry in [(C5H5N)2CH2] · [PtCl4] and an octahedral coordination in [(C5H5N)2CH2] · [PtCl6]. Interestingly, both crystal structures are stabilised by intermolecular C-H…Cl non-standard hydrogen bonds, π-π ring interactions between two pyridine rings of adjacent dications, and also by Cl-π interactions.
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© 2012 Institute of Chemistry, Slovak Academy of Sciences
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Artikel in diesem Heft
- Immobilization in biotechnology and biorecognition: from macro- to nanoscale systems
- Bond-graph description and simulation of membrane processes: Permeation in a compartmental membrane system
- Design simulations for a biogas purification process using aqueous amine solutions
- Experimental and numerical investigation of pressure drop coefficient and static pressure difference in a tangential inlet cyclone separator
- Trace elements in Variegated Bolete (Suillus variegatus) fungi
- N,N′-methylenedipyridinium Pt(II) and Pt(IV) hybrid salts: synthesis, crystal and molecular structures of [(C5H5N)2CH2] · [PtCl4] and [(C5H5N)2CH2] · [PtCl6]
- Formation of membranes based on polyacrylonitrile and butadiene-acrylonitrile elastomer in the presence of copper ions
- One-step synthesis of solid sulfonic acid catalyst and its application in the acetalization of glycerol: crystal structure of cis-5-hydroxy-2-phenyl-1,3-dioxane trimer
- Mechanistic insights into the reaction of CF3CCl3 with SO3: Theory and experiment
- Near-infrared imaging for quantitative analysis of active component in counterfeit dimethomorph using partial least squares regression
- Corrosion of titanium diboride in molten FLiNaK(eut)
- Domino synthesis of novel series of 4-substituted 5-thioxo-1,2,4-triazolidin-3-one derivatives
- Erratum to: “Nguyen Hoang Loc, Nguyen Thanh Giang: Effects of elicitors on the enhancement of asiaticoside biosynthesis in cell cultures of centella (Centella asiatica L. Urban)”, Chemical Papers 66 (7) 642–648 (2012)
