Go to  Advanced Search

Striking the right balance: An exploration of novel protonolysis precursors for CpCr(LX) complexes

Show full item record

Files in this item

Files Size Format Description   View
ubc_2009_spring_therrien_jeffrey.pdf 796.1Kb Adobe Portable Document Format   View/Open
 
Title: Striking the right balance: An exploration of novel protonolysis precursors for CpCr(LX) complexes
Author: Therrien, Jeffrey A.
Subject Keywords organochromium;protonolysis;organometallic;reactivity;chemistry
Issue Date: 2009-05-04
Series/Report no. University of British Columbia, Okanagan campus, Chemistry Undergraduate Honours Essays
Abstract: Directed ortho-metallation is a convenient route to Li(Ar-L) salts (where Ar is an aryl group), which may be used to synthesize CpCr(Ar-L) complexes by salt metathesis with chromium dichloride and sodium cyclopentadienylide. Some of these complexes have precedent as effective protonolysis precursors to CpCr(LX) complexes (where LX is a bidentate monoanionic ligand), providing a clean and direct synthetic pathway to the exploration of various anionic, bidentate ligand sets. Through the course of this investigation several new CpCr(Ar-L) complexes were rationally designed and synthesized, revealing unanticipated and undesired reactivity modes regarding the targeted protonolysis reactions. This discovery, by providing insight into the protonolysis reaction mechanism, led to the development of new CpCr(L)(X) complexes (where L is a neutral monodentate ligand, and X is an anionic monodentate ligand) through a number of synthetic routes. X-ray diffraction analysis of single crystals obtained from the attempted synthesis of CpCr(Mes)(L) (where Mes is 2,4,6-trimethylphenyl) derivative revealed a dimerized structure, suggesting that the complex contains the sought-after property of neutral ligand lability. These complexes have shown promise as a protonolysis precursor to CpCr(LX) compounds previously found unobtainable by less subtle salt metathesis pathways.
Affiliation: Chemistry and Earth and Environmental Sciences (IKBSAS) (Okanagan)Chemistry, Major in (IKBSAS) (Okanagan)
URI: http://hdl.handle.net/2429/7852
Peer Review Status:

This item appears in the following Collection(s)

Show full item record

All items in cIRcle are protected by copyright, with all rights reserved.

UBC Library
1961 East Mall
Vancouver, B.C.
Canada V6T 1Z1
Tel: 604-822-6375
Fax: 604-822-3893