{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,30]],"date-time":"2026-07-30T18:23:06Z","timestamp":1785435786337,"version":"3.56.0"},"reference-count":24,"publisher":"International Union of Crystallography (IUCr)","issue":"2","license":[{"start":{"date-parts":[[2026,1,23]],"date-time":"2026-01-23T00:00:00Z","timestamp":1769126400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/legalcode"},{"start":{"date-parts":[[2026,1,23]],"date-time":"2026-01-23T00:00:00Z","timestamp":1769126400000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/legalcode"}],"funder":[{"DOI":"10.13039\/501100005378","name":"Hacettepe Universitesi","doi-asserted-by":"publisher","award":["013 D04 602 004"],"award-info":[{"award-number":["013 D04 602 004"]}],"id":[{"id":"10.13039\/501100005378","id-type":"DOI","asserted-by":"publisher"}]}],"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":[[2026,1,18]]},"published-print":{"date-parts":[[2026,2,1]]},"abstract":"<jats:p>\n                    The title compound, C\n                    <jats:sub>16<\/jats:sub>\n                    H\n                    <jats:sub>12<\/jats:sub>\n                    N\n                    <jats:sub>2<\/jats:sub>\n                    (\n                    <jats:bold>I<\/jats:bold>\n                    ), crystallizes in the space group\n                    <jats:italic>P<\/jats:italic>\n                    2\n                    <jats:sub>1<\/jats:sub>\n                    \/\n                    <jats:italic>c<\/jats:italic>\n                    with one molecule in the asymmetric unit, in which the dihedral angles between the planes of the pyrazine ring and pendant phenyl rings are 53.12\u2005(3) and 33.28\u2005(3)\u00b0. In the crystal, pairwise C\u2014H...N hydrogen bonds link the molecules into centrosymmetric dimers and aromatic \u03c0\u2013\u03c0 stacking interactions between the pyrazine rings of adjacent molecules and C\u2014H...\u03c0 interactions help to consolidatate the packing. Compound\n                    <jats:bold>I<\/jats:bold>\n                    is a polymorph of the previously reported form of 2,3-diphenylpyrazine [Kitano\n                    <jats:italic>et al.<\/jats:italic>\n                    (1983).\n                    <jats:italic>Acta Cryst.<\/jats:italic>\n                    C\n                    <jats:bold>39<\/jats:bold>\n                    , 136\u2013139], which crystallizes in the space group\n                    <jats:italic>C<\/jats:italic>\n                    2\/\n                    <jats:italic>c<\/jats:italic>\n                    with two molecules in the asymmetric unit. The Hirshfeld surfaces and energy frameworks of the two polymorphs are compared and the bonding modes of the molecules as ligands are surveyed.\n                  <\/jats:p>","DOI":"10.1107\/s2056989026000460","type":"journal-article","created":{"date-parts":[[2026,1,19]],"date-time":"2026-01-19T17:34:12Z","timestamp":1768844052000},"page":"194-197","update-policy":"https:\/\/doi.org\/10.1107\/cm_01","source":"Crossref","is-referenced-by-count":0,"title":["A second monoclinic polymorph of 2,3-diphenylpyrazine"],"prefix":"10.1107","volume":"82","author":[{"given":"Abdulkarim K.","family":"Albishri","sequence":"first","affiliation":[{"id":[{"id":"https:\/\/ror.org\/02ma4wv74","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Naser E.","family":"Eltayeb","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/02ma4wv74","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8949-8698","authenticated-orcid":true,"given":"Jamal","family":"Lasri","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/02ma4wv74","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8602-4382","authenticated-orcid":true,"given":"Tuncer","family":"H\u00f6kelek","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Aidan P.","family":"McKay","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"329","published-online":{"date-parts":[[2026,1,23]]},"reference":[{"key":"hb8177_bb1","doi-asserted-by":"crossref","first-page":"329","DOI":"10.3987\/R-1982-02-0329","volume":"19","author":"Akita","year":"1982","journal-title":"Heterocycles"},{"key":"hb8177_bb2","doi-asserted-by":"crossref","first-page":"99","DOI":"10.1016\/S0065-2725(08)60953-8","volume":"14","author":"Cheeseman","year":"1972","journal-title":"Adv. Heterocycl. Chem."},{"key":"hb8177_bb3","doi-asserted-by":"crossref","first-page":"339","DOI":"10.1107\/S0021889808042726","volume":"42","author":"Dolomanov","year":"2009","journal-title":"J. Appl. Cryst."},{"key":"hb8177_bb4","doi-asserted-by":"crossref","first-page":"595","DOI":"10.1107\/S2056989025004451","volume":"81","author":"Eltayeb","year":"2025","journal-title":"Acta Cryst. E"},{"key":"hb8177_bb5","doi-asserted-by":"crossref","first-page":"171","DOI":"10.1107\/S2052520616003954","volume":"72","author":"Groom","year":"2016","journal-title":"Acta Cryst. B"},{"key":"hb8177_bb6","doi-asserted-by":"crossref","first-page":"421","DOI":"10.3390\/catal10040421","volume":"10","author":"Hrovat","year":"2020","journal-title":"Catalysts"},{"key":"hb8177_bb7","doi-asserted-by":"crossref","first-page":"136","DOI":"10.1107\/S0108270183003881","volume":"39","author":"Kitano","year":"1983","journal-title":"Acta Cryst. 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