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Synthesis and crystal structure of the new heteroleptic magnesium bis(amide) [{Mg[μ-N(H)Ph][N(SiMe3)2]·THF} 2], and density functional MO calculations on model systems

Lookup NU author(s): Emeritus Professor Bill Clegg

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Abstract

Reaction of Mg[N(SiMe3)2]2 with one molar equivalent of the primary amine PhNH2 in THF solution gave the transaminated THF-solvated heteroleptic bis(amide) [{Mg[μ-N(H)Ph][N(SiMe3) 2]·THF}2]. In the crystalline state the new amide is dimeric with a central, planar azamagnesacyclic (NMg)2 ring. The resonance stabilised anilido units prefer to bridge to the magnesium centres whereas the bulkier secondary hexamethyldisilazanzide groups occupy terminal sites. Terminal solvation by THF completes the distorted tetrahedral environment about magnesium. Comparisons of this structure with other crystallographically characterised heteroleptic magnesium bis(amides) are made. The interesting, almost square geometry of this (NMg)2 ring has also prompted a density functional MO study on magnesium systems and related molecules of Groups 1, 2 and 13, the results of which are also reported. © The Royal Society of Chemistry 2001.


Publication metadata

Author(s): Armstrong DR, Clegg W, Mulvey RE, Rowlings RB

Publication type: Article

Publication status: Published

Journal: Journal of the Chemical Society, Dalton Transactions

Year: 2001

Issue: 4

Pages: 409-413

Print publication date: 01/01/2001

ISSN (print): 1470-479X

ISSN (electronic): 1364-5447

Publisher: Royal Society of Chemistry

URL: http://dx.doi.org/10.1039/B008756O

DOI: 10.1039/b008756o


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