{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,13]],"date-time":"2026-05-13T16:12:03Z","timestamp":1778688723154,"version":"3.51.4"},"reference-count":33,"publisher":"MDPI AG","issue":"5","license":[{"start":{"date-parts":[[2017,5,22]],"date-time":"2017-05-22T00:00:00Z","timestamp":1495411200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Molecules"],"abstract":"<jats:p>A series of constrained geometry O-functionalized cyclopentadienylchromium complexes (1\u20136) and a S-functionalized cyclopentadienylchromium complex (7) were first synthesized, characterized, and tested as catalyst precursors for the olefin polymerization. In the presence of MAO, the complexes exhibited high catalytic activity for the polymerization of ethylene. It is shown that ligand variations can have a substantial effect on catalyst activity and stability. The effect of Al\/Cr ratio on catalytic activity was also studied.<\/jats:p>","DOI":"10.3390\/molecules22050856","type":"journal-article","created":{"date-parts":[[2017,5,23]],"date-time":"2017-05-23T01:47:33Z","timestamp":1495504053000},"page":"856","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":8,"title":["Synthesis and Characterization of Constrained Geometry Oxygen and Sulphur Functionalized Cyclopentadienylchromium Complexes and Their Use in Catalysis for Olefin Polymerization"],"prefix":"10.3390","volume":"22","author":[{"given":"Ruiguo","family":"Zhao","sequence":"first","affiliation":[{"name":"School of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, China"},{"name":"The Laboratory of Organometallic Chemistry, East China University of Science and Technology, Shanghai 200237, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jun","family":"Ma","sequence":"additional","affiliation":[{"name":"The Laboratory of Organometallic Chemistry, East China University of Science and Technology, Shanghai 200237, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hao","family":"Zhang","sequence":"additional","affiliation":[{"name":"School of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, China"},{"name":"The Laboratory of Organometallic Chemistry, East China University of Science and Technology, Shanghai 200237, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jiling","family":"Huang","sequence":"additional","affiliation":[{"name":"The Laboratory of Organometallic Chemistry, East China University of Science and Technology, Shanghai 200237, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2017,5,22]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1143","DOI":"10.1002\/anie.199511431","article-title":"Stereospecific Olefin Polymerization with Chiral Metallocene Catalysts","volume":"34","author":"Brintzinger","year":"1995","journal-title":"Angew. 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