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Andrews, P. C.
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article
Heavier alkali metal complexes of the bulky alkyl ligand 2-(bis(trimethylsilyl)methyl)-6-methylpyridine: Crystal structures of [{6-Me(2 Pyr)}(Me3Si)2CNa(pmdta)] and [{6-Me(2-Pyr)}(Me3Si)2CK]∞
Abstract
Reaction of the bulky pyridyl based ligand 6-Me(2-Pyr)(Me3Si)(2)CH with (BuM)-Bu-n (M = Na, K) in the presence of the N donors pmdta (N,N',N',N",N" pentamethyldiethylenetriamine) and tmeda (N,N,N',N' tetramethylethylenediamine) resulted in the formation and crystallisation of the heavy alkali metal complexes, [{6-Me(2-Pyr)}(Me3Si)(2)CNa(pmdta)], 1, and [{6-Me(2-Pyr)}(Me3Si)(2)CK](infinity), 2. Single crystal X-ray diffraction studies show the sodium complex, 1, to be monomeric with a six coordinate metal centre, while the unsolvated potassium complex, 2, is polymeric, involving repeating eta(3) 1-aza-allyl and allylic interactions of the pyridyl moiety with the potassium cation. (c) 2006 Elsevier B.V. All rights reserved.