(Salen)tin complexes: Syntheses, characterization, crystal structures, and catalytic activity in the formation of propylene carbonate from CO2 and propylene oxide

Huanwang Jing, Smita K. Edulji, Julianne M. Gibbs, Charlotte L. Stern, Hongying Zhou, Son Binh T. Nguyen*

*Corresponding author for this work

Research output: Contribution to journalArticle

101 Scopus citations

Abstract

A series of (salen)tin(II) and (salen)tin(IV) complexes was synthesized. The (salen)tin(IV) complexes, (salen)SnX2 (X = Br and I), were prepared in good yields via the direct oxidation reaction of (salen)tin(II) complexes with Br2 or I2. (Salen)SnX2 successfully underwent the anion-exchange reaction with AgOTf (OTf = trifluoromethanesulfonate) to form (salen)Sn(OTf)2 and (salen)Sn(X)(OTf) (X = Br). The (salen)Sn(OTf)2 complex was easily converted to any of the dihalide (salen)SnX2 compounds using halide salts. All complexes were fully characterized by 1H NMR spectroscopy, mass spectrometry, and elemental analysis, while some were characterized by 13C, 19F, and 119Sn NMR spectroscopy. Several crystal structures of (salen)tin(II) and (salen)tin(IV) were also determined. Finally, both (salen)tin(II) and (salen)tin(IV) complexes were shown to efficiently catalyze the formation of propylene carbonate from propylene oxide and CO2. Of the series, (3,3′,5,5′-Br4-salen) SnBr2, 3i, was found to be the most effective catalyst (TOF = 524 h-1).

Original languageEnglish (US)
Pages (from-to)4315-4327
Number of pages13
JournalInorganic chemistry
Volume43
Issue number14
StatePublished - Jul 12 2004

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry

Fingerprint Dive into the research topics of '(Salen)tin complexes: Syntheses, characterization, crystal structures, and catalytic activity in the formation of propylene carbonate from CO<sub>2</sub> and propylene oxide'. Together they form a unique fingerprint.

  • Cite this