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Girolami, G.S. Dickinson, Paul W. 2015-09-25T22:13:31Z 2015-09-25T22:13:31Z 10000-01-01 2006 2006 Treatment of H2OsBr6 with 4 equiv. of tetramethylcyclopentadiene (C5Me4H2) in tert-butanol affords [(C 5Me4H)2OsBr]2[Os2Br 8]. The brown color of the salt suggests that the anion adopts an eclipsed conformation (D4h symmetry) and this conclusion has been confirmed by a single-crystal X-ray diffraction experiment. Treatment of [(C5Me 4H)2OsBr]2[Os2Br8] with excess 1,5-cyclooctadiene (cod) in refluxing ethanol gives (C5Me 4H)2Os and [(C5Me4H)2OsBr][Os 2HBr4(cod)2]. An X-ray crystallographic study of the latter compound indicates that the anion adopts a confacial bioctahedral structure in which the hydride ligand and two bromides bridge between the two osmium centers. This anion is the first example of an anionic diosmium complex containing a bridging hydride. Made available in DSpace on 2015-09-25T22:13:31Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 3223579.pdf: 4285826 bytes, checksum: 9534c178685f18cbdc6b23f1f56a111f (MD5) Previous issue date: 2006 Embargo set by: Seth Robbins for item 85500 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs U of I Only 132 p. Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2006. http://hdl.handle.net/2142/84219 (MiAaPQ)AAI3223579 eng Chemistry, Inorganic Trispyrazolylborate and Tetramethylcyclopentadienyl Osmium Chemistry: Toward Methane Coordination Complexes text Chemistry Chemistry University of Illinois at Urbana-Champaign Dissertation Ph.D.