Jump to main content
Jump to site search

Issue 12, 2014
Previous Article Next Article

Synthesis and characterisation of magnesium complexes containing sterically demanding N,N′-bis(aryl)amidinate ligands

Author affiliations

Abstract

Condensation reactions of carboxylic acids and anilines in the presence of polyphosphoric acid trimethylsilyl ester (PPSE) afforded a range of sterically demanding N,N′-bis(aryl)amidines, RN{C(R′)}N(H)R [R = Mes (Mes = 2,4,6-trimethylphenyl), R′ = Cy (Cy = cyclohexyl) L1H; R = Dipp (Dipp = 2,6-diisopropylphenyl), R′ = Cy L2H; R = Mes, R′ = Ph L3H; R = Dipp, R′ = Ph L4H; R = Mes, R′ = Dmp (Dmp = 3,5-dimethylphenyl) L5H; R = Dipp, R′ = Dmp L6H; R = Dmp, R′ = Cy L7H]. Amidines L1H–L7H have been characterised spectroscopically, and for L5H and L6H, by X-ray crystallography. Treatment of the amidines with di-n-butylmagnesium in THF solution afforded the monomeric magnesium bis(amidinates) [Mg(L1)2(THF)] 1, [Mg(L2)2] 2, [Mg(L3)2(THF)] 3, [Mg(L5)2(THF)] 5, [Mg(L6)2] 6, [Mg(L7)2] 7, and the magnesium mono(amidinate) complex [Mg(L4)(nBu)] 4. These complexes have been characterised spectroscopically, with 1–3, 5 and 6 also being structurally authenticated. Comparison of the magnesium bis(amidinate) complexes reveals that the steric bulk of the amidinate ligand influences both the solid state structure and solution behaviour of these complexes.

Graphical abstract: Synthesis and characterisation of magnesium complexes containing sterically demanding N,N′-bis(aryl)amidinate ligands

Back to tab navigation

Supplementary files

Article information


Submitted
15 Nov 2013
Accepted
24 Jan 2014
First published
24 Jan 2014

Dalton Trans., 2014,43, 4838-4846
Article type
Paper
Author version available

Synthesis and characterisation of magnesium complexes containing sterically demanding N,N′-bis(aryl)amidinate ligands

G. J. Moxey, F. Ortu, L. Goldney Sidley, H. N. Strandberg, A. J. Blake, W. Lewis and D. L. Kays, Dalton Trans., 2014, 43, 4838
DOI: 10.1039/C3DT53234H

Social activity

Search articles by author

Spotlight

Advertisements