Issue 38, 2014
From the journal:

Dalton Transactions

Synthesis and thermal decomposition of a pyridylene-bridged bis-β-diketiminate magnesium hydride cluster†

Sjoerd Harder,*a   Jan Spielmannb  and  Julia Intemannac  

* Corresponding authors

a Inorganic and Organometallic Chemistry, University Erlangen-Nürnberg, Egerlandstrasse 1, 91058 Erlangen, Germany
E-mail: sjoerd.harder@fau.de

b Inorganic Chemistry, University Duisburg-Essen, Universitätsstrasse 5, 45117 Essen, Germany

c Stratingh Institute of Chemistry, University of Groningen, Nijenborgh 4, 9747 AG Groningen, Netherlands

Abstract

Reaction of PYR-(MgnBu)2, in which PYR is 2,6-[(DIPP)NC(Me)CHC(Me)N-]2-pyridine and DIPP is 2,6-iPr2-phenyl, with (DIPP)NH2BH3 gave PYR-[MgNH(DIPP)BH3]2 (56%) which was characterized by crystal structure determination. Addition of THF resulted in β-H elimination and formation of PYR-[MgNH(DIPP)BH3](MgH)·THF (57%), likewise characterized by crystal structure determination. Conversion of the second amidoborane anion in H− could not be achieved. Reaction of PYR-(MgnBu)2 with PhSiH3 gave PYR-(MgH)2, which crystallized as a dimer. The structure of [PYR-(MgH)2]2 shows an 8-membered ring of Mg2+ and H− ions. Thermal decomposition at 130 °C releases one equivalent of H2, i.e. 50% of the expected value. Nucleophilic attack at the para-position and reduction of the pyridylene bridge might explain reduced H2 release.

Graphical abstract: Synthesis and thermal decomposition of a pyridylene-bridged bis-β-diketiminate magnesium hydride cluster

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Article information

DOI
https://doi.org/10.1039/C4DT00835A
Article type
Paper
Submitted
19 Mar 2014
Accepted
11 Apr 2014
First published
14 Apr 2014
This article is Open Access
Creative Commons BY-NC license

Dalton Trans., 2014,43, 14284-14290

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Synthesis and thermal decomposition of a pyridylene-bridged bis-β-diketiminate magnesium hydride cluster

S. Harder, J. Spielmann and J. Intemann, Dalton Trans., 2014, 43, 14284 DOI: 10.1039/C4DT00835A

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