Issue 9, 1998

First structurally characterised lithium hexafluorophosphate complexes with acyclic Lewis bases: ion-separated [Li2(hmpa)5]2+·2(PF6) and ion-contacted [(pmdeta)LiPF6]2 [hmpa = (Me2N)3PO; pmdeta = MeN(CH2CH2NMe2)2]

Abstract

Reactions of NH4PF6 with BunLi in toluene containing hmpa or pmdeta afford the complexes [Li2- (hmpa)5]2+·2(PF6) 1, an ion-separated species containing an unusual dinuclear dication, and [(pmdeta)LiPF6]2 2 in which PF6 anions bridge (pmdeta)Li+ units via Li···F interactions, this being the first observation of a bridging mode for this anion; ab initio MO calculations help explain the very different structures of 1 and 2.

Article information

Article type
Paper

Chem. Commun., 1998, 1011-1012

First structurally characterised lithium hexafluorophosphate complexes with acyclic Lewis bases: ion-separated [Li2(hmpa)5]2+·2(PF6) and ion-contacted [(pmdeta)LiPF6]2 [hmpa = (Me2N)3PO; pmdeta = MeN(CH2CH2NMe2)2]

D. R. Armstrong, D. R. Armstrong, A. H. Khandelwal, P. R. Raithby, L. C. Kerr, S. Peasey, P. R. Raithby, G. P. Shields, R. Snaith and D. S. Wright, Chem. Commun., 1998, 1011 DOI: 10.1039/A801280F

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