Synthesis and structural characterization of lithium and iron complexes containing a chelating phenolate phosphane ligand

Lan Chang Liang, Yu Ning Chang, Huan Yu Shih, Sheng Ta Lin, Hon Man Lee

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The preparation and characterization of lithium and iron(II) complexes containing a potentially tridentate biphenolate phosphane ligand are reported. Deprotonation of 2,2′-phenylphosphanyl-bis(4,6-di-tert-butylphenol) (H2LPh) with one or two equivalents of nBuLi in diethyl ether solutions at-35 °C produces binuclear {Li(HLPh)(OEt 2)}2 or tetranuclear Li4(LPh) 2(OEt2)3, respectively. An X-ray study of {Li(HLPh)(OEt2)}2 showed it to be a C i-symmetric dimer composed of two Li(HLPh)(OEt 2) units linked with dative O-Li bonds involving phenolate oxygen donor atoms whereas that of Li4(LPh)2(OEt 2)3 revealed a C2-symmetric structure in which the two biphenolate phosphane ligands are linked with four lithium atoms that bind to three diethyl ether molecules. Treatment of FeCl2 with one or two equivalents of Na2(LPh)(DME)2 in THF at-35 °C generates binuclear Fe2(LPh)2(THF) 2 or mononuclear Fe(HLPh)2(THF)2, respectively. The two iron(II) centers in Fe2(LPh) 2(THF)2 are antiferromagnetically coupled.

Original languageEnglish
Pages (from-to)4077-4082
Number of pages6
JournalEuropean Journal of Inorganic Chemistry
Issue number26
Publication statusPublished - 2011 Sep 1


All Science Journal Classification (ASJC) codes

  • Inorganic Chemistry

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