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Issue 32, 2008
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Effects of 5,5-substitution on dipyrrolylmethaneligand isomerization

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Abstract

The difference in steric profiles for η5 and η1-pyrrolyls can be used to modify barriers for pyrrolyl exchange. The method investigated incorporated 1,3-diaxial interactions in a cyclohexyl backbone of the dipyrrolylmethane. Some of the enthalpic barrier created with the 1,3-steric interactions appears to be mediated by increased entropy in the ground state, but noticeable changes are produced in the pyrrolyl exchange rates by 1H NMR without steric crowding at the metal center.

Graphical abstract: Effects of 5,5-substitution on dipyrrolylmethane ligand isomerization

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Submitted
24 Apr 2008
Accepted
22 May 2008
First published
11 Jul 2008

Dalton Trans., 2008, 4254-4258
Article type
Paper

Effects of 5,5-substitution on dipyrrolylmethane ligand isomerization

D. L. Swartz II and A. L. Odom, Dalton Trans., 2008, 4254
DOI: 10.1039/B806947F

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