The first mixed-anion complex of a lithium phosphazene: Synthesis and crystal and solution structure of [(LiCH2P(Ph)(2)=NPh)center dot(LiOC6H2-2,6-{C(CH3)(3)}-4-CH3)](2)

Reference:

Price, R. D., Fernandez, I., Gomez, G. R., Ortiz, F. L., Davidson, M. G., Cowan, J. A. and Howard, J. A. K., 2004. The first mixed-anion complex of a lithium phosphazene: Synthesis and crystal and solution structure of [(LiCH2P(Ph)(2)=NPh)center dot(LiOC6H2-2,6-{C(CH3)(3)}-4-CH3)](2). Organometallics, 23 (25), pp. 5934-5938.

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Abstract

The crystal and toluene solution structure (X-ray, H-1, Li-7, C-13, P-31 NMR) of a mixed-anion lithium phosphazene-phenolate, 10, is a six-rung ladder consisting of two LiPCN units fused to a central Li2O2 core, which provides insight into the function of phosphazenyl-stabilized carbanions as reagents. The mixed aggregate showed decreased reactivity toward benzaldehyde with respect to the uncomplexed anion.

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