Complex formation of cyclomalto-octaose with tetrabromophenolphthalein and some related compounds

The interactions of cyclomalto-octaose (γ-cyclodextrin) with some phthalein-type acid—base indicators have been investigated photometrically. Bromine substituents enhance the formation of complexes and tetrabromophenolphthalein [3,3-bis(3,5-dibromo-4-hydroxyphenyl)-3H-isobenzofuran-1-one] forms the...

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Bibliographic Details
Published in:Carbohydrate research 1989-10, Vol.192, p.103-109
Main Authors: Barcza, Lajos, Buvári-Barcza, Ágnes
Format: Article
Language:English
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Summary:The interactions of cyclomalto-octaose (γ-cyclodextrin) with some phthalein-type acid—base indicators have been investigated photometrically. Bromine substituents enhance the formation of complexes and tetrabromophenolphthalein [3,3-bis(3,5-dibromo-4-hydroxyphenyl)-3H-isobenzofuran-1-one] forms the most stable complex ( K 6.0 × 10 3). This stability and other phenomena suggest that the host and guest are involved in a three-site interaction.
ISSN:0008-6215
1873-426X
DOI:10.1016/0008-6215(89)85170-5