{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,14]],"date-time":"2026-01-14T19:05:49Z","timestamp":1768417549525,"version":"3.49.0"},"reference-count":22,"publisher":"International Union of Crystallography (IUCr)","issue":"2","license":[{"start":{"date-parts":[[2015,1,17]],"date-time":"2015-01-17T00:00:00Z","timestamp":1421452800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/journals.iucr.org\/services\/copyrightpolicy.html"},{"start":{"date-parts":[[2015,1,17]],"date-time":"2015-01-17T00:00:00Z","timestamp":1421452800000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/journals.iucr.org\/services\/copyrightpolicy.html#TDM"}],"content-domain":{"domain":["iucr.org","wiley.com","iucrj.org"],"crossmark-restriction":true},"short-container-title":["Acta Crystallogr C Struct Chem","Acta Crystallogr C","Acta Crystallogr C Cryst Struct Commun","Acta Cryst C","Acta Cryst C Struct Chem","Acta Cryst Sect C","Acta Cryst Sect C Struct Chem","Acta Crystallogr Sect C","Acta Crystallogr Sect C Struct Chem","Acta Crystallogr Sect C Cryst Struct Commun"],"published-print":{"date-parts":[[2015,2,1]]},"abstract":"<jats:p>A potentially pentadentate hydrazone ligand,<jats:italic>N<\/jats:italic>\u2032-[1-(pyrazin-2-yl)ethylidene]nicotinohydrazide (H<jats:italic>L<\/jats:italic>), was prepared from the condensation reaction of nicotinohydrazide and acetylpyrazine. Reactions of H<jats:italic>L<\/jats:italic>with MnCl<jats:sub>2<\/jats:sub>, Mn(CH<jats:sub>3<\/jats:sub>COO)<jats:sub>2<\/jats:sub>and Cd(CH<jats:sub>3<\/jats:sub>COO)<jats:sub>2<\/jats:sub>afforded three metal complexes, namely dichlorido{<jats:italic>N<\/jats:italic>\u2032-[1-(pyrazin-2-yl-\u03ba<jats:italic>N<\/jats:italic><jats:sup>1<\/jats:sup>)ethylidene]nicotinohydrazide-\u03ba<jats:sup>2<\/jats:sup><jats:italic>N<\/jats:italic>\u2032,<jats:italic>O<\/jats:italic>}manganese(II), [MnCl<jats:sub>2<\/jats:sub>(C<jats:sub>12<\/jats:sub>H<jats:sub>11<\/jats:sub>N<jats:sub>5<\/jats:sub>O)], (I), bis{<jats:italic>N<\/jats:italic>\u2032-[1-(pyrazin-2-yl-\u03ba<jats:italic>N<\/jats:italic><jats:sup>1<\/jats:sup>)ethylidene]nicotinohydrazidato-\u03ba<jats:sup>2<\/jats:sup><jats:italic>N<\/jats:italic>\u2032,<jats:italic>O<\/jats:italic>]manganese(II), [Mn(C<jats:sub>12<\/jats:sub>H<jats:sub>10<\/jats:sub>N<jats:sub>5<\/jats:sub>O)<jats:sub>2<\/jats:sub>], (II), and poly[[(acetato-\u03ba<jats:sup>2<\/jats:sup><jats:italic>O<\/jats:italic>,<jats:italic>O<\/jats:italic>\u2032){\u03bc<jats:sub>3<\/jats:sub>-<jats:italic>N<\/jats:italic>\u2032-[1-(pyrazin-2-yl-\u03ba<jats:sup>2<\/jats:sup><jats:italic>N<\/jats:italic><jats:sup>1<\/jats:sup>:<jats:italic>N<\/jats:italic><jats:sup>4<\/jats:sup>)ethylidene]nicotinohydrazidato-\u03ba<jats:sup>3<\/jats:sup><jats:italic>N<\/jats:italic>\u2032,<jats:italic>O<\/jats:italic>:<jats:italic>N<\/jats:italic><jats:sup>1<\/jats:sup>}cadmium(II)] chloroform disolvate], {[Cd(C<jats:sub>12<\/jats:sub>H<jats:sub>10<\/jats:sub>N<jats:sub>5<\/jats:sub>O)(CH<jats:sub>3<\/jats:sub>COO)]\u00b72CHCl<jats:sub>3<\/jats:sub>}<jats:sub><jats:italic>n<\/jats:italic><\/jats:sub>, (III), respectively. Complex (I) has a mononuclear structure, the Mn<jats:sup>II<\/jats:sup>centre adopting a distorted square-pyramidal coordination. Complex (II) also has a mononuclear structure, with the Mn<jats:sup>II<\/jats:sup>centre occupying a special position (<jats:italic>C<\/jats:italic><jats:sub>2<\/jats:sub>symmetry) and adopting a distorted octahedral coordination environment, which is defined by two O atoms and four N atoms from two<jats:italic>N<\/jats:italic>\u2032-[1-(pyrazin-2-yl)ethylidene]nicotinohydrazidate (<jats:italic>L<\/jats:italic><jats:sup>\u2212<\/jats:sup>) ligands related<jats:italic>via<\/jats:italic>a crystallographic twofold axis. Complex (III) features a unique three-dimensional network with rectangular channels, and the<jats:italic>L<\/jats:italic><jats:sup>\u2212<\/jats:sup>ligand also serves as a counter-anion. The coordination geometry of the Cd<jats:sup>II<\/jats:sup>centre is pentagonal bipyramidal. This study demonstrates that H<jats:italic>L<\/jats:italic>, which can act as either a neutral or a mono-anionic ligand, is useful in the construction of interesting metal\u2013organic compounds.<\/jats:p>","DOI":"10.1107\/s2053229615000698","type":"journal-article","created":{"date-parts":[[2015,1,16]],"date-time":"2015-01-16T13:40:18Z","timestamp":1421415618000},"page":"116-121","update-policy":"https:\/\/doi.org\/10.1107\/cm_01","source":"Crossref","is-referenced-by-count":5,"title":["Mononuclear and three-dimensional metal complexes based on a multidentate hydrazone ligand"],"prefix":"10.1107","volume":"71","author":[{"given":"Yan-Fei","family":"Liu","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ya-Ping","family":"Liu","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ke-Ke","family":"Zhang","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Qing-Ling","family":"Ren","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jie","family":"Qin","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"329","published-online":{"date-parts":[[2015,1,17]]},"reference":[{"key":"ku3143_bb1","doi-asserted-by":"crossref","first-page":"1575","DOI":"10.1039\/C1CE06030A","volume":"14","author":"Bai","year":"2012","journal-title":"CrystEngComm"},{"key":"ku3143_bb2","unstructured":"Bruker (2002). 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