{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,5]],"date-time":"2025-11-05T14:40:53Z","timestamp":1762353653400,"version":"build-2065373602"},"reference-count":28,"publisher":"International Union of Crystallography (IUCr)","issue":"11","license":[{"start":{"date-parts":[[2025,10,24]],"date-time":"2025-10-24T00:00:00Z","timestamp":1761264000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/legalcode"},{"start":{"date-parts":[[2025,10,24]],"date-time":"2025-10-24T00:00:00Z","timestamp":1761264000000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/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"],"accepted":{"date-parts":[[2025,10,10]]},"published-print":{"date-parts":[[2025,11,1]]},"abstract":"\n 2-Picolinium tetrachloridoaurate(III), (C\n 6<\/jats:sub>\n H\n 8<\/jats:sub>\n N)[AuCl\n 4<\/jats:sub>\n ] or (2-PicH)[AuCl\n 4<\/jats:sub>\n ],\n 1<\/jats:bold>\n , and 2-picolinium tetrabromidoaurate(III), (C\n 6<\/jats:sub>\n H\n 8<\/jats:sub>\n N)[AuBr\n 4<\/jats:sub>\n ] or (2-PicH)[AuBr\n 4<\/jats:sub>\n ],\n 2<\/jats:bold>\n , both crystallize in the space group\n P<\/jats:italic>\n 1<\/jats:overline>\n with\n Z<\/jats:italic>\n = 4, but are not isotypic. Bis(2-picolinium) tetrabromidoaurate(III) bromide, (C\n 6<\/jats:sub>\n H\n 8<\/jats:sub>\n N)\n 2<\/jats:sub>\n [AuBr\n 4<\/jats:sub>\n ]Br or (2-PicH)\n 2<\/jats:sub>\n [AuBr\n 4<\/jats:sub>\n ]Br,\n 3<\/jats:bold>\n , crystallizes in the space group\n P<\/jats:italic>\n 1<\/jats:overline>\n with\n Z<\/jats:italic>\n = 2. All atoms of\n 1<\/jats:bold>\n \u2013\n 3<\/jats:bold>\n lie on general positions. 3-Picolinium tetrabromidoaurate(III), (C\n 6<\/jats:sub>\n H\n 8<\/jats:sub>\n N)[AuCl\n 4<\/jats:sub>\n ] or (3-PicH)[AuBr\n 4<\/jats:sub>\n ],\n 4<\/jats:bold>\n , crystallizes in the space group\n P<\/jats:italic>\n 2\n 1<\/jats:sub>\n \/\n c<\/jats:italic>\n with\n Z<\/jats:italic>\n = 4; the two independent anions each display inversion symmetry.\n trans<\/jats:italic>\n -Dibromidobis(4-picoline)gold(III) tetrabromidoaurate(III) nitromethane monosolvate, [AuBr\n 2<\/jats:sub>\n (C\n 6<\/jats:sub>\n H\n 7<\/jats:sub>\n N)\n 2<\/jats:sub>\n ](AuBr\n 4<\/jats:sub>\n ]\u00b7CH\n 3<\/jats:sub>\n NO\n 2<\/jats:sub>\n or [(4-Pic)\n 2<\/jats:sub>\n AuBr\n 2<\/jats:sub>\n ](AuBr\n 4<\/jats:sub>\n ]\u00b7CH\n 3<\/jats:sub>\n NO\n 2<\/jats:sub>\n ,\n 5<\/jats:bold>\n , and 4-picolinium tetrabromidoaurate(III), (C\n 6<\/jats:sub>\n H\n 8<\/jats:sub>\n N)[AuBr\n 4<\/jats:sub>\n ] or (4-PicH)[AuBr\n 4<\/jats:sub>\n ],\n 6<\/jats:bold>\n , both crystallize in the space group\n P<\/jats:italic>\n 1<\/jats:overline>\n with\n Z<\/jats:italic>\n = 2; both involve two independent anions with inversion symmetry. 2,4-Lutidinium tetrabromidoaurate(III), (C\n 7<\/jats:sub>\n H\n 10<\/jats:sub>\n N)[AuBr\n 4<\/jats:sub>\n ] or (2,4-LutH)[AuBr\n 4<\/jats:sub>\n ],\n 7<\/jats:bold>\n , crystallizes in the space group\n P<\/jats:italic>\n 2\n 1<\/jats:sub>\n 2\n 1<\/jats:sub>\n 2\n 1<\/jats:sub>\n with\n Z<\/jats:italic>\n = 4. All the gold(III) species show the expected square-planar geometry. The main interest centres on the packing patterns. In\n 1<\/jats:bold>\n , hydrogen bonds, Cl...Cl contacts, axial Au...Cl contacts (\u2018coinage bonds\u2019) and Cl...\u03c0 contacts combine to form layers parallel to (101). In\n 2<\/jats:bold>\n , similar contacts (but involving Br) link the residues to form corrugated layers parallel to the\n ac<\/jats:italic>\n plane. In\n 3<\/jats:bold>\n , classical hydrogen bonds, Br...Br contacts and a coinage bond, all involving the free bromide ion, combine to produce rings of composition Au\n 2<\/jats:sub>\n Br\n 4<\/jats:sub>\n , which are then linked by another Br...Br contact, to form chains of residues parallel to [01\n 1<\/jats:overline>\n ]. In\n 4<\/jats:bold>\n , hydrogen bonds and a Br...Br contact generate chains of residues parallel to [101], which are in turn linked by a Br...\u03c0 contact. In\n 5<\/jats:bold>\n , Br...Br contacts and coinage bonds link the anions and cations to form a corrugated layer structure parallel to the\n ac<\/jats:italic>\n plane, involving six-membered Au\n 2<\/jats:sub>\n Br\n 4<\/jats:sub>\n and ten-membered Au\n 4<\/jats:sub>\n Br\n 6<\/jats:sub>\n rings. A similar combination of contacts in\n 6<\/jats:bold>\n leads to a layer structure parallel to the\n ab<\/jats:italic>\n plane, also involving a pattern of six- and ten-membered rings topologically analogous to that of\n 5<\/jats:bold>\n . However, the angles in the rings of the two layers differ appreciably, and\n 6<\/jats:bold>\n also contains a short Br...\u03c0 contact. In\n 7<\/jats:bold>\n , a hydrogen bond combines with a coinage bond to produce a ribbon of residues parallel to the\n a<\/jats:italic>\n axis. Three further, longer and perhaps borderline, Br...Br and Br...\n Cg<\/jats:italic>\n contacts link the ribbons to form a three-dimensional pattern.\n <\/jats:p>","DOI":"10.1107\/s2056989025008801","type":"journal-article","created":{"date-parts":[[2025,10,14]],"date-time":"2025-10-14T05:58:19Z","timestamp":1760421499000},"page":"1028-1039","update-policy":"https:\/\/doi.org\/10.1107\/cm_01","source":"Crossref","is-referenced-by-count":0,"title":["Crystal structures of\n trans<\/i>\n -dibromidobis(4-picoline)gold(III) tetrabromidoaurate(III) nitromethane monosolvate, bis(2-picolinium) tetrabromidoaurate(III) bromide, and five salts of the type picolinium or lutidinium tetrahalogenidoaurate(III)"],"prefix":"10.1107","volume":"81","author":[{"given":"Cindy","family":"D\u00f6ring","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Peter G.","family":"Jones","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"329","published-online":{"date-parts":[[2025,10,24]]},"reference":[{"key":"yz2072_bb1","doi-asserted-by":"crossref","first-page":"65","DOI":"10.1002\/zaac.19824850107","volume":"485","author":"Adams","year":"1982","journal-title":"Z. 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