Encapsulation of half-sandwich complexes of molybdenum with β-cyclodextrin

Abstract

β-Cyclodextrin formed stable, crystalline 1∶1 host∶guest inclusion compounds, in high yields, with half-sandwich complexes of molybdenum of the type MoCp′(η³-C₃H₅)(CO)₂ (Cp′ = Cp, C₅H₄SiMe₃ or C₉H₇). The products have been characterised in the solid state by elemental analysis, FTIR spectroscopy, TGA, powder X-ray diffraction and ¹³C MAS NMR spectroscopy. Channel-type structures were formed with Cp′ = Cp and C₉H₇, while with Cp′ = C₅H₄SiMe₃ the arrangement of the cyclodextrin molecules was more similar to that of pristine β-cyclodextrin hydrate.