1. Preparation and Properties of Inclusion Compounds of Cyclodextrins with Organotransition Metal Complexes
- Author
-
Akira Harada and Takahashi Shigetoshi
- Subjects
chemistry.chemical_classification ,Thermogravimetric analysis ,Circular dichroism ,Cyclodextrin ,Norbornadiene ,General Engineering ,Infrared spectroscopy ,Metal ,Thermogravimetry ,chemistry.chemical_compound ,chemistry ,Transition metal ,visual_art ,Polymer chemistry ,visual_art.visual_art_medium ,Organic chemistry - Abstract
Inclusion compounds of transition metal complexes of cycloocta-1,5-diene (cod) and norbornadiene (nbd) with cyclodextrins were prepared. Two-to-one (cyclodextrin:guest) inclusion compounds were obtained in high yields by the treatment of β-cyclodextrin (β-CD) with [(L)RhCl]2 (L = nbd or cod) and 1:1 inclusion compounds were obtained by the reaction of β-CD with (cod)PtX2 (X = Cl, Br, or I) in high yields, while γ-CD formed 1:1 inclusion compounds with (cod)PtX2 (X = Br or I). The formation of inclusion compounds is selective. α-CD did not form inclusion compounds with any transition-metal complexes with cycloocta-1,5-diene. Thermogravimetric measurements show that the complexes are stabilized by inclusion in cyclodextrin cavities. The inclusion compounds were characterized by 1 H-NMR, IR, UV, and circular dichroism spectra.
- Published
- 1989
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