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The toluene solution structure of an N-lithio(triphenyl)phosphazene (Ph(3)PNLi) mixed aggregate with lithium bromide (LiBr), 5, has been elucidated for the first time based on multinuclear magnetic resonance measurements ((1)H, (6)Li, (7)Li, (13)C and (31)P). The structure consist of two dimers [Li(mu-Z)](2) (Z= Br, NPR(3)) linked through LiX (X= N, Br) bridges. This arrangement is a cubane-like structure analogous to that found in the solid-state.

Five new lithium aryloxide complexes stabilised by polyamine ligands have been synthesised by simple deprotonation reactions of the parent aryl alcohols H–OAr [OAr = OC6H5, OC6H2-2,4,6-(Me)3and OC6H2-2,6-(tBu)2-4-(Me)] with LiN(SiMe3)2in the presence of the Lewis bases N,N,N′,N′-tetramethylethylenediamine (TMEDA) and N,N,N′,N′′,N′′-pentamethyldiethylenetriamine (PMDETA). All the compounds have been characterised by multinuclear NMR and X-ray crystallographic studies. The PMDETA derivative of the phenol adopts a tetrameric ladder-like structural motif in the solid state, exhibiting an unusual bridging coordination mode of the N-donor ligand. The 2,4,6-trimethylphenol derivatives exhibit dimeric (TMEDA), and tetrameric (PMDETA) structural motifs in the solid state. Meanwhile, the TMEDA and PMDETA derivatives of the sterically hindered 2,6-di-tert-butyl-4-methylphenol exhibit a rare monomeric structural motifs, which appears to remain unaltered in C6D6solution. [ABSTRACT FROM AUTHOR]

The toluene solution structure of an N-lithio(triphenyl)phosphazene (Ph3PNLi) mixed aggregate with lithium bromide (LiBr), 5, has been elucidated for the first time based on multinuclear magnetic resonance measurements (1H, 6Li, 7Li, 13C and 31P). The structure consist of two dimers [Li(μ-Z)]2 (Z= Br, NPR3) linked through LiX (X= N, Br) bridges. This arrangement is a cubane-like structure analogous to that found in the solid-state. [ABSTRACT FROM AUTHOR]

Metalation of an ammonium tris(phenol) ligand affords new lithium/sodium derivatives having central pseudocubane motifs in which one of the metallic positions is replaced by a four-coordinate hydrogen atom. [ABSTRACT FROM AUTHOR]