{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,1,14]],"date-time":"2025-01-14T05:18:12Z","timestamp":1736831892436,"version":"3.33.0"},"reference-count":15,"publisher":"International Union of Crystallography (IUCr)","issue":"8","license":[{"start":{"date-parts":[[2016,7,29]],"date-time":"2016-07-29T00:00:00Z","timestamp":1469750400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/2.0\/uk\/legalcode"},{"start":{"date-parts":[[2016,7,29]],"date-time":"2016-07-29T00:00:00Z","timestamp":1469750400000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/2.0\/uk\/legalcode"}],"content-domain":{"domain":["iucr.org","wiley.com","iucrj.org"],"crossmark-restriction":true},"short-container-title":["Acta Crystallogr E Cryst Commun","Acta Cryst E","Acta Cryst Sect E","Acta Crystallogr E","Acta Crystallogr Sect E","Acta Cryst E Cryst Commun","Acta Cryst Sect E Cryst Commun"],"published-print":{"date-parts":[[2016,8,1]]},"abstract":"<jats:p>The isotypic title one-dimensional coordination polymers, [CdCl<jats:sub>2<\/jats:sub>(C<jats:sub>18<\/jats:sub>H<jats:sub>14<\/jats:sub>N<jats:sub>4<\/jats:sub>O<jats:sub>4<\/jats:sub>)]<jats:sub><jats:italic>n<\/jats:italic><\/jats:sub>, (I), and [HgCl<jats:sub>2<\/jats:sub>(C<jats:sub>18<\/jats:sub>H<jats:sub>14<\/jats:sub>N<jats:sub>4<\/jats:sub>O<jats:sub>4<\/jats:sub>)]<jats:sub><jats:italic>n<\/jats:italic><\/jats:sub>, (II), are, respectively, the cadmium(II) and mercury(II) complexes of the dimethyl ester of 5,6-bis(pyridin-2-yl)pyrazine-2,3-dicarboxylic acid. In both compounds, the metal ions are located on a twofold rotation axis and a second such axis bisects the C<jats:sub>ar<\/jats:sub>\u2014C<jats:sub>ar<\/jats:sub>bonds of the pyrazine ring. The metal ions are bridged by binding to the N atoms of the two pyridine rings and have an<jats:italic>M<\/jats:italic>N<jats:sub>2<\/jats:sub>Cl<jats:sub>2<\/jats:sub>bisphenoidal coordination geometry. The metal\u2013N<jats:sub>pyrazine<\/jats:sub>distances are much longer than the metal\u2013N<jats:sub>pyridine<\/jats:sub>distances; the difference is 0.389\u2005(2)\u2005\u00c5 for the Cd\u2014N bonds but only 0.286\u2005(5)\u2005\u00c5 for the Hg\u2014N bond lengths. In the crystals of both compounds, the polymer chains are linked<jats:italic>via<\/jats:italic>pairs of C\u2014H...Cl hydrogen bonds, forming corrugated slabs parallel to the<jats:italic>ac<\/jats:italic>plane.<\/jats:p>","DOI":"10.1107\/s2056989016012093","type":"journal-article","created":{"date-parts":[[2016,7,29]],"date-time":"2016-07-29T09:24:15Z","timestamp":1469784255000},"page":"1214-1218","update-policy":"https:\/\/doi.org\/10.1107\/cm_01","source":"Crossref","is-referenced-by-count":2,"title":["Isotypic one-dimensional coordination polymers:<i>catena<\/i>-poly[[dichloridocadmium]-\u03bc-5,6-bis(pyridin-2-yl)pyrazine-2,3-dicarboxylato-\u03ba<sup>2<\/sup><i>N<\/i><sup>5<\/sup>:<i>N<\/i><sup>6<\/sup>] and<i>catena<\/i>-poly[[dichloridomercury(II)]-\u03bc-5,6-bis(pyridin-2-yl)pyrazine-2,3-dicarboxylato-\u03ba<sup>2<\/sup><i>N<\/i><sup>5<\/sup>:<i>N<\/i><sup>6<\/sup>]"],"prefix":"10.1107","volume":"72","author":[{"given":"Montserrat","family":"Alfonso","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Helen","family":"Stoeckli-Evans","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"329","published-online":{"date-parts":[[2016,7,29]]},"reference":[{"key":"zl2672_bb1","unstructured":"Alfonso, M. 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