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Their single crystals have been obtained by crystallization from a THF\/hexane solvent mixture. Diols (<jats:bold>I<\/jats:bold>) and (<jats:bold>II<\/jats:bold>) crystallize in orthorhombic (<jats:italic>Pbca<\/jats:italic>) and triclinic (<jats:italic>P<\/jats:italic>\\overline{1}) space groups, respectively, at 150\u2005K. Their asymmetric units comprise one [in the case of (<jats:bold>I<\/jats:bold>)] and three [in the case of (<jats:bold>II<\/jats:bold>)] crystallographically independent molecules of the achiral (1<jats:italic>R<\/jats:italic>,2<jats:italic>S<\/jats:italic>,4<jats:italic>r<\/jats:italic>)-diol isomer. Each hydroxyl group is involved in one intramolecular and one intermolecular O\u2014H...O hydrogen bond, forming one-dimensional chains. Compounds (<jats:bold>I<\/jats:bold>) and (<jats:bold>II<\/jats:bold>) have been used successfully as precatalyst activators for the ring-opening polymerization of \u220a-caprolactone.<\/jats:p>","DOI":"10.1107\/s2056989019008673","type":"journal-article","created":{"date-parts":[[2019,6,21]],"date-time":"2019-06-21T08:35:46Z","timestamp":1561106146000},"page":"1035-1040","update-policy":"https:\/\/doi.org\/10.1107\/cm_01","source":"Crossref","is-referenced-by-count":0,"title":["(1<i>R<\/i>,2<i>S<\/i>,4<i>r<\/i>)-1,2,4-Triphenylcyclopentane-1,2-diol and (1<i>R<\/i>,2<i>S<\/i>,4<i>r<\/i>)-4-(2-methoxyphenyl)-1,2-diphenylcyclopentane-1,2-diol: application as initiators for ring-opening polymerization of \u220a-caprolactone"],"prefix":"10.1107","volume":"75","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-4181-5022","authenticated-orcid":true,"given":"Pavel D.","family":"Komarov","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4089-3697","authenticated-orcid":true,"given":"Mikhail E.","family":"Minyaev","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3336-4022","authenticated-orcid":true,"given":"Andrei V.","family":"Churakov","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Dmitrii M.","family":"Roitershtein","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9151-1890","authenticated-orcid":true,"given":"Ilya E.","family":"Nifant'ev","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"329","published-online":{"date-parts":[[2019,6,21]]},"reference":[{"key":"fy2139_bb1","unstructured":"Bruker (2018). 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