{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,2,21]],"date-time":"2025-02-21T21:21:16Z","timestamp":1740172876666,"version":"3.37.3"},"reference-count":16,"publisher":"International Union of Crystallography (IUCr)","issue":"9","license":[{"start":{"date-parts":[[2016,8,25]],"date-time":"2016-08-25T00:00:00Z","timestamp":1472083200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/journals.iucr.org\/services\/copyrightpolicy.html"},{"start":{"date-parts":[[2016,8,25]],"date-time":"2016-08-25T00:00:00Z","timestamp":1472083200000},"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":[[2016,9,1]]},"abstract":"<jats:p>The preparation of coordination polymers (CPs) based on either transition metal centres or rare-earth cations has grown considerably in recent decades. The different coordination chemistry of these metals allied to the use of a large variety of organic linkers has led to an amazing structural diversity. Most of these compounds are based on carboxylic acids or nitrogen-containing ligands. More recently, a wide range of molecules containing phosphonic acid groups have been reported. For the particular case of Ca<jats:sup>2+<\/jats:sup>-based CPs, some interesting functional materials have been reported. A novel one-dimensional Ca<jats:sup>2+<\/jats:sup>-based coordination polymer with a new organic linker, namely poly[[diaqua[\u03bc<jats:sub>4<\/jats:sub>-(4,5-dicyano-1,2-phenylene)bis(phosphonato)][\u03bc<jats:sub>3<\/jats:sub>-(4,5-dicyano-1,2-phenylene)bis(phosphonato)]dicalcium(II)] tetrahydrate], {[Ca<jats:sub>2<\/jats:sub>(C<jats:sub>8<\/jats:sub>H<jats:sub>4<\/jats:sub>N<jats:sub>2<\/jats:sub>O<jats:sub>6<\/jats:sub>P<jats:sub>2<\/jats:sub>)<jats:sub>2<\/jats:sub>(H<jats:sub>2<\/jats:sub>O)<jats:sub>2<\/jats:sub>]\u00b74H<jats:sub>2<\/jats:sub>O}<jats:sub><jats:italic>n<\/jats:italic><\/jats:sub>, has been prepared at ambient temperature. The crystal structure features one-dimensional ladder-like<jats:sub>\u221e<\/jats:sub><jats:sup>1<\/jats:sup>[Ca<jats:sub>2<\/jats:sub>(H<jats:sub>2<\/jats:sub>cpp)<jats:sub>2<\/jats:sub>(H<jats:sub>2<\/jats:sub>O)<jats:sub>2<\/jats:sub>] polymers [H<jats:sub>2<\/jats:sub>cpp is (4,5-dicyano-1,2-phenylene)bis(phosphonate)], which are created by two distinct coordination modes of the anionic H<jats:sub>2<\/jats:sub>cpp<jats:sup>2\u2212<\/jats:sup>cyanophosphonate organic linkers: while one molecule is only bound to Ca<jats:sup>2+<\/jats:sup>cations<jats:italic>via<\/jats:italic>the phosphonate groups, the other establishes an extra single connection<jats:italic>via<\/jats:italic>a cyano group. Ladders close pack with water molecules through an extensive network of strong and highly directional O\u2014H...O and O\u2014H...N hydrogen bonds; the observed donor\u2013acceptor distances range from 2.499\u2005(5) to 3.004\u2005(6)\u2005\u00c5 and the interaction angles were found in the range 135\u2013178\u00b0. One water molecule was found to be disordered over three distinct crystallographic positions. A detailed solution-state NMR study of the organic linker is also provided.<\/jats:p>","DOI":"10.1107\/s2053229616012328","type":"journal-article","created":{"date-parts":[[2016,8,26]],"date-time":"2016-08-26T10:28:16Z","timestamp":1472207296000},"page":"685-691","update-policy":"https:\/\/doi.org\/10.1107\/cm_01","source":"Crossref","is-referenced-by-count":1,"title":["A ladder coordination polymer based on Ca<sup>2+<\/sup>and (4,5-dicyano-1,2-phenylene)bis(phosphonic acid): crystal structure and solution-state NMR study"],"prefix":"10.1107","volume":"72","author":[{"given":"Nutalapati","family":"Venkatramaiah","sequence":"first","affiliation":[]},{"given":"Ricardo F.","family":"Mendes","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2861-8286","authenticated-orcid":true,"given":"Artur M. S.","family":"Silva","sequence":"additional","affiliation":[]},{"given":"Jo\u00e3o P. C.","family":"Tom\u00e9","sequence":"additional","affiliation":[]},{"given":"Filipe A.","family":"Almeida Paz","sequence":"additional","affiliation":[]}],"member":"329","published-online":{"date-parts":[[2016,8,25]]},"reference":[{"key":"yf3107_bb1","doi-asserted-by":"crossref","first-page":"380","DOI":"10.1107\/S0108768102003890","volume":"58","author":"Allen","year":"2002","journal-title":"Acta Cryst. B"},{"key":"yf3107_bb2","doi-asserted-by":"crossref","first-page":"3074","DOI":"10.1021\/cm0302431","volume":"15","author":"Bishop","year":"2003","journal-title":"Chem. Mater."},{"key":"yf3107_bb3","unstructured":"Brandenburg, K. (1999). DIAMOND. Crystal Impact GbR, Bonn, Germany."},{"key":"yf3107_bb4","unstructured":"Bruker (2001). SADABS. Bruker AXS Inc., Madison, Wisconsin, USA."},{"key":"yf3107_bb5","unstructured":"Bruker (2012). SAINT and APEX2. 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