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Three 2,5-dialkoxy-1,4-diethynylbenzene derivatives

2008-02Journal article Open access
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dc.contributor.authorFigueira, João
dc.contributor.authorRodrigues, João
dc.contributor.authorRusso, Luca
dc.contributor.authorRissanen, Kari
dc.date.accessioned2019-06-17T09:35:45Z
dc.date.available2019-06-17T09:35:45Z
dc.date.issued2008-02
dc.description.abstract2,5-Diethoxy-1,4-bis[(trimethylsilyl)ethynyl]benzene, C(20)H(30)O(2)Si(2), (I), constitutes one of the first structurally characterized examples of a family of compounds, viz. the 2,5-dialkoxy-1,4-bis[(trimethylsilyl)ethynyl]benzene derivatives, used in the preparation of oligo(phenyleneethynylene)s via Pd/Cu-catalysed cross-coupling. 2,5-Diethoxy-1,4-diethynylbenzene, C(14)H(14)O(2), (II), results from protodesilylation of (I). 1,4-Diethynyl-2,5-bis(heptyloxy)benzene, C(24)H(34)O(2), (III), is a long alkyloxy chain analogue of (II). The molecules of compounds (I)-(III) are located on sites with crystallographic inversion symmetry. The large substituents either in the alkynyl group or in the benzene ring have a marked effect on the packing and intermolecular interactions of adjacent molecules. All the compounds exhibit weak intermolecular interactions that are only slightly shorter than the sum of the van der Waals radii of the interacting atoms. Compound (I) displays C-H...pi interactions between the methylene H atoms and the acetylenic C atom. Compound (II) shows pi-pi interactions between the acetylenic C atoms, complemented by C-H...pi interactions between the methyl H atoms and the acetylenic C atoms. Unlike (I) or (II), compound (III) has weak nonclassical hydrogen-bond-type interactions between the acetylenic H atoms and the ether O atoms.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationFigueira, J., Rodrigues, J., Russo, L., & Rissanen, K. (2008). Three 2, 5-dialkoxy-1, 4-diethynylbenzene derivatives. Acta Crystallographica Section C: Crystal Structure Communications, 64, o33-o36.pt_PT
dc.identifier.doi10.1107/S0108270107065523pt_PT
dc.identifier.issn0108-2701
dc.identifier.urihttp://hdl.handle.net/10400.13/2395
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherInternational Union of Crystallographypt_PT
dc.relationNovel polarised molecular wires based on transition metal complexes of di4-pyridylheterocycles spacers bridging ligands
dc.relationNEW METALLOMOLECULAR WIRES BASED IN OLIGOTHIOPHENE BRIDGING SYSTEMS - A SYSTEMATIC STUDY.
dc.relationUSE OF SOLID-STATE NUCLEAR MAGNETIC RESONANCE NMR FOR STRUCTURAL CHARACTERIZATION OF MOLECULAR WIRES AND METALLODENDRIMERS.
dc.subjectThree 2,5-dialkoxy-1,4-diethynylbenzene derivativespt_PT
dc.subject.pt_PT
dc.subjectFaculdade de Ciências Exatas e da Engenhariapt_PT
dc.titleThree 2,5-dialkoxy-1,4-diethynylbenzene derivativespt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleNovel polarised molecular wires based on transition metal complexes of di4-pyridylheterocycles spacers bridging ligands
oaire.awardTitleNEW METALLOMOLECULAR WIRES BASED IN OLIGOTHIOPHENE BRIDGING SYSTEMS - A SYSTEMATIC STUDY.
oaire.awardTitleUSE OF SOLID-STATE NUCLEAR MAGNETIC RESONANCE NMR FOR STRUCTURAL CHARACTERIZATION OF MOLECULAR WIRES AND METALLODENDRIMERS.
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/POCI/POCTI%2FCTM%2F41495%2F2001/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/PIDDAC/SFRH%2FBD%2F29325%2F2006/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/FARH/SFRH%2FBSAB%2F632%2F2006/PT
oaire.citation.endPageo36pt_PT
oaire.citation.startPageo33pt_PT
oaire.citation.titleActa Crystallographica Section C: Crystal Structure Communicationspt_PT
oaire.citation.volumeC64pt_PT
oaire.fundingStreamPOCI
oaire.fundingStreamPIDDAC
oaire.fundingStreamFARH
person.familyNameFigueira
person.familyNameRodrigues
person.familyNameRissanen
person.givenNameJoão
person.givenNameJoão
person.givenNameKari
person.identifier.ciencia-idA81C-620E-DD6A
person.identifier.orcid0000-0001-8819-2278
person.identifier.orcid0000-0003-4552-1953
person.identifier.orcid0000-0002-7282-8419
person.identifier.ridB-6816-2008
person.identifier.scopus-author-id9233278800
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
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