Novel phosphazene derivatives: Synthesis, anisochronism and structural investigations of mono- and ditopic spiro-crypta phosphazenes

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dc.contributor.authorAsmafiliz, Nuran
dc.contributor.authorİlter, Elif Ece
dc.contributor.authorIsıklan, Muhammet
dc.contributor.authorKilic, Zeynel
dc.contributor.authorTercan, Baris
dc.contributor.authorCaylak, Nagihan
dc.contributor.authorBüyükgüngör, Orhan
dc.date.accessioned2020-06-25T17:43:50Z
dc.date.available2020-06-25T17:43:50Z
dc.date.issued2007
dc.descriptionHokelek, Tuncer/0000-0002-8602-4382; Asmafiliz, Nuran/0000-0002-9335-4101
dc.description.abstractThe reactions of hexachlorocyclotriphosphazatriene, N3P3Cl6, with N2O2-donor type coronands (diaza-crown ethers) 1-3 afford novel monotopic 4-7 and ditopic 8-10 spiro-crypta phosphazenes, respectively. It has been observed that the reactions of N3P3Cl6 with I equivalent amount of coronands 1-3 yield only monotopic spiro-derivatives, while three equivalent amount of coronands 2 and 3 give dominantly ditopic dispiro-crypta-phosphazene skeletons. On the other hand, the P-31 NMR spectrum of 8 indicates that the ditopic spiro-ansa phosphazene 10 is present besides the ditopic dispiro derivative 8. Unexpectedly, the reaction of 6 with excess amount of pyrrolidine leads to the formation of geminal product 7. The P-31 NMR spectra of 4, 5, 6 and 10 indicate that all of these compounds have anisochronism. The structures of 5, 8 and 9 have been determined by X-ray crystallography. The relative radii of macrocyclic hole sizes of 5, 8 and 9 are calculated from the crystallographic results. The relationships between the exocyclic NPN and endocyclic NPN bond angles of the analogous compounds with delta P-shifts of NPN phosphorus atoms have been discussed. Thus, sums of the bond angles around the nitrogen atoms are in the range of [342.7(2)degrees-354.4(2)degrees], showing that the nitrogen atoms have pyramidal configurations. The pyramidal configuration gives rise to stereogenic properties. The salient spectroscopic features [FTIR, H-1, C-13, P-31 NMR, HETCOR (for 5 and 7) and MS] of all the compounds are presented. (c) 2006 Elsevier B.V. All rights reserved.en_US
dc.identifier.citationclosedAccessen_US
dc.identifier.doi10.1016/j.molstruc.2006.08.017
dc.identifier.endpage183en_US
dc.identifier.issn0022-2860
dc.identifier.issn1872-8014
dc.identifier.issue1-3en_US
dc.identifier.scopus2-s2.0-33847631591
dc.identifier.scopusqualityQ1
dc.identifier.startpage172en_US
dc.identifier.urihttps://doi.org10.1016/j.molstruc.2006.08.017
dc.identifier.urihttps://hdl.handle.net/20.500.12587/3918
dc.identifier.volume832en_US
dc.identifier.wosWOS:000245732800022
dc.identifier.wosqualityQ3
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherElsevieren_US
dc.relation.ispartofJournal Of Molecular Structure
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectmono- and ditopic-crypta-phosphazenesen_US
dc.subjectspiro- and ansa-phosphazenesen_US
dc.subjectcrystal structure of crypta-phosphazeneen_US
dc.subjectanisochronyen_US
dc.titleNovel phosphazene derivatives: Synthesis, anisochronism and structural investigations of mono- and ditopic spiro-crypta phosphazenesen_US
dc.typeArticle

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