Preliminary Communication Complex formation of Ca2+ ions with 1-O-n-octyl-ß-D- mannofuranoside

Abstract. This paper describes the first example of complex formation of an alkylglycoside with calcium ions. Qualitative evidence for complex formation is obtained by titration microcalorimetry. Carbohydrate-d rived surfactants enjoy a growing interest because they possess potential for industrial applications. A significant advantage is that these surfactants can be prepared from renewable sources.1 In previous studies2,3 it was observed that carbohydrates form complexes with calcium ions, while Van Bekkum and coworkers4,5 found complex formation in the case of alditols, using lanthanides as calcium analogues. 1-O(S)-alkyl(-1-thio)glycosides may also provide sites for complexation with Ca2+ ions. This paper present