Abstract
Using monoanionic triazenide ligands derived from biphenyl and m-terphenyl substituted triazenes Dmp(Tph)N3H (1a), (Me4Ter)2N3H (1b) or Dmp(Mph)N3H (1c) (Dmp = 2,6-Mes2C6H3 with Mes = 2,4,6-Me3C6H2; Me4Ter = 2,6-(3,5-Me2C6H3)2C6H3; Mph = 2-MesC6H4; Tph = 2-TripC6H4 with Trip = 2,4,6-i-Pr3C6H2), several magnesium triazenides were synthesized. Heteroleptic complexes [Mg(N3Ar2)I(OEt2)] (Ar2 = Dmp/Tph (2a), (Me4Ter)2 (2b) were obtained from metalation of the corresponding triazenes with di-n-butylmagnesium followed by reaction with iodine in diethyl ether as the solvent in high yields. Replacing diethyl ether by n-heptane afforded trinuclear compounds [Mg3(N3Ar2)2I4] (3a, 3b) in low yields in which a central MgI2 fragment is coordinated by two iodomagnesium triazenide moieties. Two unsolvated homoleptic magnesium compounds [Mg(N3Ar2)2] (4b, 4c) were obtained from di-n-butylmagnesium and triazenes 1b or 1c in a 1:2 ratio. Depending on the nature of the substituents, the magnesium center either shows the expected tetrahedral or a rather unusual square planar coordination.
Highlights
The quest for suitable ligand systems that are able to stabilize unsolvated monomeric metal complexes is one of the most intensely-studied fields of coordination and organometallic chemistry [1].Exploration of this area is motivated by potential applications of these reactive complexes in catalysis and organic synthesis
We describe the synthesis and characterization of several heteroleptic and homoleptic magnesium triazenides
The heteroleptic iodomagnesium triazenides 2a and 2b are accessible in diethyl ether as the solvent via metalation of the diaryltriazenes Dmp(Tph)N3 H (1a) or (Me4 Ter)2 N3 H (1b)
Summary
The quest for suitable ligand systems that are able to stabilize unsolvated monomeric metal complexes is one of the most intensely-studied fields of coordination and organometallic chemistry [1].Exploration of this area is motivated by potential applications of these reactive complexes in catalysis and organic synthesis. We reported the preparation of derivatives of diaryl-substituted, sterically-crowded triazenido ligands that are bulky enough to prevent undesirable ligand redistribution reactions [5,6,7,8,9,10,11,12]. These ligands allowed structurally characterizing the first examples of aryl compounds of the heavier alkaline earth metals
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
