Reaction of 1,1-Diphenylethylene with Lithium. Characterization and Stability of the Resultant Initiator

Stella Sioula, Nikolaos Hadjichristidis*, Patrizia Dardani, Francesco Morandi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

1,1,4,4-Tetraphenyl-1,4-dilithiobutane (TPDLi) was prepared, by using high vacuum techniques, from 1,1-diphenylethylene and lithium metal, in tetrahydrofuran (THF)/ benzene (4/1 by vol.) mixture, at room temperature and at 0°C. The quality of the difunctional initiator (DFI) was evaluated by polymerizing styrene and by characterizing the neutralized by (methanol) DFI, GC/MS and NMR spectroscopy. The TPDLi prepared at 0°C is almost 100% difunctional whereas the TPDLi prepared at room temperature is contaminated by the monofunctional species LiCPh2CH2CH2CPh2(CH 2CH2CH2CH2OLi) (∼ 30%), produced from the reaction of one of its active centers with THF.

Original languageEnglish (US)
Pages (from-to)35-46
Number of pages12
JournalInternational Journal of Polymer Analysis and Characterization
Volume5
Issue number1
DOIs
StatePublished - Jan 1 1999

Keywords

  • 1,1,4,4-Tetraphenyl-1,4-dilithiobutane
  • 1,1-Diphenylethylene
  • GC/MS
  • Lithium
  • NMR

ASJC Scopus subject areas

  • Analytical Chemistry
  • Chemical Engineering(all)
  • Polymers and Plastics

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