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Synthesis And Structure Of [{(THF)2Li}3Me2Al{(PhNH)2(PhN)4P3N3}], The First Mixed-Metal Phosphazenate Complex

F. Rivals, A. Steiner
Published 2003 · Chemistry

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Reaction of the trilithium phosphazenate [{(THF)2Li}3{(PhNH)3(PhN)3P3N3}] with one equivalent of trimethylaluminium yields the first mixed-metal phosphazenate complex [{(THF)2Li}3Me2Al{(PhNH)2(PhN)4P3N3}]. X-ray structure analysis showed that the Me2Al group is accommodated in an N(exo)−P−N(exo) chelation site of the phosphazenate ligand. Two lithium ions reside in N(ring)−P−N(exo) sites, while the third lithium ion interacts with the ligand solely via an N(ring) atom. NMR spectroscopic data obtained from THF solution indicate a fluxional behaviour of the lithium ions, which oscillate between mono- and bidentate coordination sites. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003)

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