Solution and solid-state structures of lithiated cyclic phosphonates

Scott E. Denmark, Kevin A. Swiss, Paula C. Miller, Scott R. Wilson

Research output: Contribution to journalArticlepeer-review

Abstract

Spectroscopic analysis of lithiated cyclic phosphonates belonging to the 1,3,2-dioxaphosphorinane 2-oxide class have been examined by NMR spectroscopy in THF and by single-crystal X-ray crystallography. Lithio P-benzyl-1,3,2-dioxaphosphorinane 2-oxide (Li+7-) and lithio P-isopropyl-1,3,2-dioxaphosphorinane 2-oxide (Li+8-) are characterized by freely rotating, sp2-hybridized onions devoid of lithium-carbon contacts. The anions are most likely dimers linked through oxygen-lithium bridges. The P-isopropyl compound crystallized from TMEDA/THF as a C-lithiated dimer in which each lithium bridges a carbon and an oxygen and is solvated by one TMEDA molecule.

Original languageEnglish (US)
Pages (from-to)209-218
Number of pages10
JournalHeteroatom Chemistry
Volume9
Issue number2
DOIs
StatePublished - 1998

ASJC Scopus subject areas

  • General Chemistry

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