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Stabilization of carbonium ions in the vicinity of metallocene nuclei

Citation

Hill, Elgin Alexander (1961) Stabilization of carbonium ions in the vicinity of metallocene nuclei. Dissertation (Ph.D.), California Institute of Technology. http://resolver.caltech.edu/CaltechETD:etd-05052006-111842

Abstract

A remarkable stabilization imparted to a carbonium ion by an adjacent metallocene nucleus has been demonstrated by a solvolytic study of substituted metallocenylcarbinyl acetates. The solvolysis mechanism has be shown to be to be an uncatalyzed alkl-oxygen fission of the neutral ester by a study of the hydrolysis under a variety of conditions and by determination of the products from the ethanolyses. Participation of the metal in the solvolyses by direct bonding between the metal and the incipient carbonium ion center is indicated by the effects of simple substituents by the effect of joining the rings by a three-carbon bridge, by the solvolysis of the acetate vinylogous to methylferrocenylcarbinyl acetate and by the stereochemistry of the solvolyses of derivatives with substitution in the 2-position of the ferrocene nucleus. A plausible molecular orbital model for such participation has been suggested in qualitative terms.

Spectra of the ferrocene derivatives prepared in this study are correlated and discussed. Evidence is presented which demonstrates intramolecular hydrogen bonding to the metal atom in substituted metallocenylcarbinols, and which indicates that the rings of l,l'- trimethyleneferrocene are tilted.

Item Type:Thesis (Dissertation (Ph.D.))
Degree Grantor:California Institute of Technology
Division:Chemistry and Chemical Engineering
Major Option:Chemistry
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Richards, John H.
Thesis Committee:
  • Unknown, Unknown
Defense Date:1 January 1961
Record Number:CaltechETD:etd-05052006-111842
Persistent URL:http://resolver.caltech.edu/CaltechETD:etd-05052006-111842
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:1631
Collection:CaltechTHESIS
Deposited By: Imported from ETD-db
Deposited On:23 May 2006
Last Modified:26 Dec 2012 02:40

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