EMAIL THIS PAGE TO A FRIEND

Journal of the American Chemical Society

Transition metal-stabilized arenium cations: protonation of arenes dihapto-coordinated to pi-basic metal fragments.


PMID 15161309

Abstract

A series of metal complexes was synthesized in which arenes were dihapto-coordinated to pi-basic metal fragments having the general form [TpM(pi-acid)(L)], where Tp = hydridotris(pyrazolyl)borate, M = rhenium, molybdenum, or tungsten, pi-acid = CO or NO(+), and L = 1-methylimidazole, 1-butylimidazole, pyridine, or trimethylphosphine. The arene complexes were shown to be significantly more basic than the analogous pentaammineosmium(II) arene complexes and were protonated by moderate acids to give remarkably stable eta(2) and eta(3) arenium cation complexes. A crystal structure of [TpRe(CO)(MeIm)(5,6-eta(2)-2H-anisolium)](OTf) confirmed the eta(2) coordination of the anisolium ligand, but suggests a weak long-range interaction between the metal and C1 of the anisolium.

Related Materials

Product #

Image

Description

Molecular Formula

Add to Cart

348414
1-Butylimidazole, 98%
C7H12N2