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dc.creatorDraskovic, Nenad S.
dc.creatorRadanović, Dušanka
dc.creatorRychlewska, Urszula
dc.creatorWarzajtis, Beata
dc.creatorStanojević, Ivana M.
dc.creatorĐuran, Miloš
dc.date.accessioned2019-01-30T17:32:39Z
dc.date.available2019-01-30T17:32:39Z
dc.date.issued2012
dc.identifier.issn0277-5387
dc.identifier.urihttp://cer.ihtm.bg.ac.rs/handle/123456789/1107
dc.description.abstractStructural variations modulated by ethyl side group have been analyzed for nickel(II) and copper(II) complexes with (+/-)-1,3-pentanediamine-N,N,N',N'-tetraacetate ligand (1,3-pndta) and its pentadentate derivative (+/-)-1,3-pentanediamine-N,N,N'-triacetate (1,3-pnd3a). X-ray results obtained for the octahedral 1,3-pndta-Ni(II) complex indicate the distinct correlation of the central chirality of the metal with the chirality at the diamine alpha-carbon, which leads to the formation of a racemic mixture of Delta Lambda Delta(R) and Lambda Delta Lambda(S) enantiomeric anionic complexes, where the R and S labels designate the absolute configuration at the ligand (ethyl-substituted) stereogenic center. These stereoisomers are those required to maintain an equatorial ethyl group on the central six-membered chelate ring, whose conformation is lambda twist-boat for the Delta Lambda Delta isomer and 8 twist-boat for the Lambda Delta Lambda isomer. Ethyl group discernibly affects the variation of the Ni-N and Ni-O bond lengths compared to the analogous complex lacking the substitution of one of the diastereotopic diamine CH2 hydrogens and functions as steric bulkiness which hampers an efficient and of high symmetry packing, observed in the crystals of the parent complex. The infrared and electronic absorption spectra of hexadentate Mg[Ni(1,3-pndta)]center dot 10H(2)O (1) and Mg[Cu(1,3-pndta)]center dot 7H(2)O (3), and pentadentate Mg[Ni-2(1,3-pnd3a)(2)]center dot 8H(2)O (2) and MgiCu2(1,3-pnd3a)(2)]center dot 7H(2)O (4) complexes are presented and discussed in comparison with those of the analogous Mg[Ni(1,3-pdta)center dot 8H(2)O (5), Ma[Cu(1,3-pdta)]center dot 8H(2)O (6) and Mg[Cu-2(1,3-pd3a)(2)]center dot 7H(2)O (7) complexes of known crystal structures.en
dc.publisherPergamon-Elsevier Science Ltd, Oxford
dc.relationinfo:eu-repo/grantAgreement/MESTD/Basic Research (BR or ON)/172036/RS//
dc.rightsrestrictedAccess
dc.sourcePolyhedron
dc.subjectNi(II) complexesen
dc.subjectSynthesisen
dc.subjectX-ray characterizationen
dc.subjectInfrared and electronic absorption spectraen
dc.subjectCu(II) complexesen
dc.subject1,3-pndta ligandsen
dc.subject1,3-pnd3a ligandsen
dc.titleSynthesis and spectral characterization of nickel(II) and copper(II) complexes with the hexadentate (+/-)-1,3-pentanediamine-N,N,N ',N '-tetraacetate ligand and its pentadentate derivative: Stereospecific formation and crystal structure of [Mg(H2O)(6)][Nien
dc.typearticle
dc.rights.licenseARR
dcterms.abstractДјуран, Милос И.; Драсковиц, Ненад С.; Wарзајтис, Беата; Рyцхлеwска, Урсзула; Радановић, Душанка; Станојевиц, Ивана М.;
dc.citation.volume43
dc.citation.issue1
dc.citation.spage185
dc.citation.epage193
dc.citation.other43(1): 185-193
dc.citation.rankM22
dc.identifier.doi10.1016/j.poly.2012.06.013
dc.identifier.rcubConv_2842
dc.identifier.scopus2-s2.0-84864286102
dc.identifier.wos000308388100023
dc.type.versionpublishedVersion


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