Stopping Hydrogen Migration in Its Tracks: The First Successful Synthesis of Group Ten Scorpionate Complexes Based on Azaindole Scaffolds

Rosenildo Correa Da Costa, Benjamin W. Rawe, Angelo Iannetelli, Graham J. Tizzard, Simon J. Coles, Alan J. Guwy, Gareth R Owen

Research output: Contribution to journalArticle (Academic Journal)peer-review

3 Citations (Scopus)

Abstract

The first successful synthesis and characterization of group 10 complexes featuring flexible scorpionate ligands based on 7-azaindole heterocycles are reported herein. Addition of 2 equiv of either K[HB(azaindolyl)3] or Li[HB(Me)(azaindolyl)2] to [M(μ-Cl)(η,1η2-COEOMe)]2 leads to the formation of 2 equiv of the complexes [M{κ3-N,N,H-HB(azaindolyl)3}(η,1η2-COEOMe)] and [M{κ3-N,N,H-HB(Me)(azaindolyl)2}(η,1η2-COEOMe)] (where M = Pt, Pd; COEOMe = 8-methoxycyclooct-4-en-1-ide), respectively. In these reactions, the borohydride group is directed toward the metal center forming square based pyramidal complexes. In contrast to analogous complexes featuring other flexible scorpionate ligands, no hydrogen migration from boron is observed in the complexes studied. The fortuitous line widths observed in some of the 11B NMR spectra allow for a closer inspection of the B-H···metal unit in scorpionate complexes than has previously been possible.

Original languageEnglish
Pages (from-to)359-367
Number of pages9
JournalInorganic Chemistry
Volume58
Issue number1
Early online date10 Dec 2018
DOIs
Publication statusPublished - 7 Jan 2019

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