Mononuclear Formamidinate Complexes of Lithium and Sodium |
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Authors: | Marcus L Cole Cameron Jones Dr Peter C Junk |
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Institution: | 1. School of Chemistry, Box 23, Monash University, Clayton, Victoria, 3800, Australia;2. School of Chemistry, University of New South Wales, Sydney, NSW 2052, Australia |
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Abstract: | Treatment of N,N′‐bis(aryl)formamidines (FXylH = N,N′‐bis(2,6‐dimethylphenyl)formamidine, FEtH = N,N′‐bis(2,6‐diethylphenyl)formamidine, FisoH = N,N′‐bis(2,6‐diisopropylphenyl)formamidine) with nBuLi in the presence of tmeda (= N,N,N′,N′‐tetramethylethylenediamine) led to deprotonation of the amidine affording Li(FXyl)(tmeda)] ( 1 ), Li(FEt)(tmeda)] ( 2 ) and Li(Fiso)(tmeda)] ( 3 ) respectively. Similar treatment of FXylH and FisoH with Na{N(SiMe3)2}] in THF and pmdeta (= N,N,N′,N″,N″‐pentamethyldiethylenetriamine) yielded Na(FXyl)(pmdeta)] ( 4 ) and Na(Fiso)(pmdeta)] ( 5 ). All complexes were characterised by spectroscopy (NMR and IR) and X‐ray crystallography. Due to the bulkiness of the formamidinate ligands and the multidentate nature of the supporting neutral amine ligands (tmeda and pmdeta), all compounds were mononuclear with η2‐chelating formamidinate ligands in the solid state. |
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Keywords: | Lithium Sodium Formamidinates Metal amides Tmeda Pmdeta |
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