Campus Units

Chemistry, Ames Laboratory

Document Type

Article

Publication Version

Published Version

Publication Date

10-16-2008

Journal or Book Title

Inorganic Chemistry

Volume

47

Issue

22

First Page

10208

Last Page

10210

DOI

10.1021/ic801637s

Abstract

Optically active C3-symmetric monoanionic ligands are uncommon in organometallic chemistry. Here we describe the synthesis of readily prepared tris(4S-isopropyl-2-oxazolinyl)phenylborate [ToP] and fluxional, zwitterionic four- and five-coordinate iridium(I) compounds [Ir(ToP)(η4-C8H12)] (4) and [Ir(ToP)(CO)2] (5). The highly fluxional nature of 4 and5 makes structural assignment difficult, and the interaction between the iridium(I) center and the [ToP] ligand is established by solid-state and solution 15N NMR methods that permit the direct comparison between solution and solid-state structures. Although iridium cyclooctadiene 4 is a mixture of four- and five-coordinate species, the dicarbonyl 5 is only the five-coordinate isomer. The addition of electrophiles MeOTf and MeI provides the oxazoline N-methylated product rather than the iridium methyl oxidative addition product. N-Methylation was unequivocally proven by through-bond coupling observed in 1H−15N HMBC experiments.

Comments

Reprinted (adapted) with permission from Inorganic Chemistry 47 (2008): 10208, doi:10.1021/ic801637s. Copyright 2008 American Chemical Society.

Copyright Owner

American Chemical Society

Language

en

File Format

application/pdf

Included in

Chemistry Commons

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