Most of the natural products isolated at present are heterocyclic compounds, so heterocyclic compounds occupy an important position in the research of organic chemistry. A compound: 218290-24-5, is researched, SMILESS is O=C(N[C@H]1[C@H](NC(C2=NC=CC=C2)=O)CCCC1)C3=NC=CC=C3, Molecular C18H20N4O2Journal, Inorganica Chimica Acta called Spectroscopic characterization of coaxially and π-π stacked binuclear copper(II) complexes of ω,ω’-bis(pyridine-2-carboxamido)alkanes in acidic solution, Author is Kajikawa, Yuji; Azuma, Nagao; Tajima, Kunihiko, the main research direction is crystal structure copper bispyridinecarboxamidoalkane; copper bispyridinecarboxamidoalkane binuclear preparation structure stacking interaction; pyridinecarboxamidoalkane copper binuclear preparation structure stacking interaction; conformation copper bispyridinecarboxamidoalkane stacking interaction.Product Details of 218290-24-5.
Using ESR and visible spectroscopies, coaxially stacked binuclear Cu(II) complexes of ω,ω’-bis(pyridine-2-carboxamido)alkanes in acidic aqueous solution (pH 3.8-5.0), H2peda (alkane = ethane), H2ppda (alkane = propane), and H2pbda (alkane = butane), were characterized. Trans-1,2-Bis(pyridine-2-carboxamido)cyclohexane or trans-H2pcyhda (alkane = trans-1,2-cyclohexane) did not provide coaxially stacked binuclear complex, because of the lower conformational freedom at the HNCH-CHNH bond. The coaxially stacked structure causes π-π stacking between the pyridyl rings. The conformation of the propanediyl chain is gauche-gauche, while the ethanediyl and butanediyl chains contain an eclipsed conformation. The driving force for the formation of these binuclear complexes in acidic solution is intramol. π-π stacking interaction between the pyridyl rings in concert with hydrophobic interaction. Although H2ppda gave crystals of a binuclear complex with many lattice H2O mols., H2peda and H2pbda ligands provided crystals of Cu(II) polymer complexes from the resp. acidic solution The trans-H2pcyhda ligand forms a Cu(II) binuclear complex with open-chain structure in acidic solution Crystal structures of the polymer complexes are also presented.
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Reference:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics