{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,2]],"date-time":"2025-11-02T19:50:46Z","timestamp":1762113046238,"version":"3.32.0"},"reference-count":0,"publisher":"International Union of Crystallography (IUCr)","issue":"2","license":[{"start":{"date-parts":[[2007,3,16]],"date-time":"2007-03-16T00:00:00Z","timestamp":1174003200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/journals.iucr.org\/services\/copyrightpolicy.html"},{"start":{"date-parts":[[2007,3,16]],"date-time":"2007-03-16T00:00:00Z","timestamp":1174003200000},"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 B Struct Sci","Acta Cryst B","Acta Cryst Sect B","Acta Crystallogr B","Acta Crystallogr Sect B","Acta Crystallogr Sect B Struct Sci"],"accepted":{"date-parts":[[2006,12,14]]},"published-print":{"date-parts":[[2007,4,1]]},"abstract":"<jats:p>A combination of single-crystal and powder X-ray diffractometry was used to study the structure of two polymorphs of 4-bromobenzophenone over the temperature range from 100 to 300\u2005K. One of the polymorphs of the title compound was known previously and its structure has been determined at room temperature [Ebbinghaus <jats:italic>et al.<\/jats:italic> (1997). <jats:italic>Z. Kristallogr.<\/jats:italic> \n                  <jats:bold>212<\/jats:bold>, 339\u2013340]. Two crystal growth methods were employed, one of which (a modification of the Bridgman\u2013Stockbarger technique) resulted in single crystals of a previously unknown structure. The basic physical properties of the stable polymorph are: growth method, from 2-propanol solutions or gradient sublimation; space group, monoclinic <jats:italic>P<\/jats:italic>2<jats:sub>1<\/jats:sub>\/<jats:italic>c<\/jats:italic>; melting point, <jats:italic>T<\/jats:italic>\n                  <jats:sub>m<\/jats:sub> = 355.2\u2005K; X-ray density (at 100\u2005K), <jats:italic>D<jats:sub>x<\/jats:sub>\n                  <\/jats:italic> = 1.646\u2005g\u2005cm<jats:sup>\u22123<\/jats:sup>. The same properties of the metastable polymorph (triclinic P\\overline 1 ) are: growth method, modified Bridgman\u2013Stockbarger method; X-ray density (at 100\u2005K), <jats:italic>D<jats:sub>x<\/jats:sub>\n                  <\/jats:italic> = 1.645\u2005g\u2005cm<jats:sup>\u22123<\/jats:sup>; <jats:italic>T<\/jats:italic>\n                  <jats:sub>m<\/jats:sub> = 354\u2005K. Thermograms suggest that the melting of the metastable form is accompanied by at least a partial crystallization presumably into the monoclinic form; the transformation is therefore monotropic. Analysis of short distances in both polymorphs shows that numerous weak hydrogen bonds of the C\u2014H...\u03c0 type ensure additional stabilization within the respective planes normal to the longest dimension of the molecules. The strong temperature dependence of the lattice constants and of the weak bond distances in the monoclinic form suggest that the weak bond interactions might be responsible for both the large thermal expansion within plane <jats:italic>bc<\/jats:italic> and the considerable thermal expansion anisotropy.<\/jats:p>","DOI":"10.1107\/s0108768106054334","type":"journal-article","created":{"date-parts":[[2007,3,20]],"date-time":"2007-03-20T12:24:22Z","timestamp":1174393462000},"page":"296-302","update-policy":"https:\/\/doi.org\/10.1107\/cm_01","source":"Crossref","is-referenced-by-count":16,"title":["Polymorphism of 4-bromobenzophenone"],"prefix":"10.1107","volume":"63","author":[{"given":"Mikhail A.","family":"Strzhemechny","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Vyacheslav N.","family":"Baumer","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Anatoli A.","family":"Avdeenko","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Oleg S.","family":"Pyshkin","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Roman V.","family":"Romashkin","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Lyubov M.","family":"Buravtseva","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"329","published-online":{"date-parts":[[2007,3,16]]},"container-title":["Acta Crystallographica Section B Structural Science"],"original-title":[],"link":[{"URL":"http:\/\/journals.iucr.org\/b\/issues\/2007\/02\/00\/ry5005\/ry5005.pdf","content-type":"unspecified","content-version":"vor","intended-application":"text-mining"},{"URL":"http:\/\/journals.iucr.org\/b\/issues\/2007\/02\/00\/ry5005\/ry5005.pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,1,11]],"date-time":"2025-01-11T14:10:15Z","timestamp":1736604615000},"score":1,"resource":{"primary":{"URL":"https:\/\/journals.iucr.org\/paper?S0108768106054334"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2007,3,16]]},"references-count":0,"journal-issue":{"issue":"2","published-print":{"date-parts":[[2007,4]]}},"alternative-id":["S0108768106054334"],"URL":"https:\/\/doi.org\/10.1107\/s0108768106054334","relation":{"is-supplemented-by":[{"id-type":"doi","id":"10.1107\/S0108768106054334\/ry5005sup1.cif","asserted-by":"subject"},{"id-type":"doi","id":"10.1107\/S0108768106054334\/ry5005sup2.txt","asserted-by":"subject"},{"id-type":"doi","id":"10.1107\/S0108768106054334\/ry5005sup3.txt","asserted-by":"subject"},{"id-type":"doi","id":"10.1107\/S0108768106054334\/ry5005sup4.txt","asserted-by":"subject"},{"id-type":"doi","id":"10.1107\/S0108768106054334\/ry5005sup5.txt","asserted-by":"subject"},{"id-type":"doi","id":"10.1107\/S0108768106054334\/ry50054btltsup6.fcf","asserted-by":"subject"},{"id-type":"doi","id":"10.1107\/S0108768106054334\/ry50054m250sup7.fcf","asserted-by":"subject"},{"id-type":"doi","id":"10.1107\/S0108768106054334\/ry50054btltsup8.fcf","asserted-by":"subject"}]},"ISSN":["0108-7681"],"issn-type":[{"type":"print","value":"0108-7681"}],"subject":[],"published":{"date-parts":[[2007,3,16]]},"assertion":[{"value":"Acta 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