Derivatives of divalent germanium, tin, and lead. Part V. Bis-(pentane-2,4-dionato)-, bis(1,1,1-trifluoropentane-2,4-dionato)-, and bis(1,1,1,5,5,5-hexafluoropentane-2,4-dionato)-tin(II)

Abstract

The tin(II)β-diketonato-derivatives, bis(pentane-2,4-dionato)tin(II)[Sn(acac)₂], bis(1,1,1 -trifluoropentane-2,4-dionato)tin(II)[Sn(tfac)₂], and bis(1,1,1,5,5,5-hexafluoropentane-2,4-dionato)tin(II)[Sn(hfac)₂], have been synthesised by the reaction of the appropriate β-diketone with tin(II) dimethoxide or bis(methylcyclopentadienyl)-tin(II), or from tin(II) chloride or bromide and the sodium salt of the β-diketone. The derivatives are monomeric in both benzene solution and the gas phase, and exhibit high volatility and solubility in both polar and non-polar organic solvents. The perfluorinated derivatives are Lewis acids and form 1 : 1 complexes with 2,2′-bipyridyl and 1,10-phenanthroline. [Sn(hfac)₂] Also undergoes ready ligand exchange with tin(II) chloride forming [Sn(hfac)Cl]. I.r., ¹H and ¹⁹F n.m.r., tin-119 Mössbauer, and mass spectra have been recorded and structural information inferred therefrom.