Spontaneous resolution through helical association of a Cu-azamacrocyclic complex with Lindqvist-type isopolyanion
Monima Sarma1, Tanmay Chatterjee, Hanumanthugari Vindhya
1School of Chemistry, University of Hyderabad, Central University P.O., Hyderabad, 500 046, Andhra Pradesh, India.
Abstract:
Anionic metathesis reaction between the perchlorate salt of a copper-tetraazamacrocycle complex and the tetrabutylammonium salt of Lindqvist-type isopolyoxometalates in acetonitrile leads to the formation of two new inorganic-organic hybrid solids formulated as [Cu(L)(MeCN)][W(6)O(19)] (1) and [Cu(L)(MeCN)][Mo(6)O(19)] (2). Interestingly, both ion-pair complexes crystallize in a chiral space group P2(1)2(1)2(1). Crystallographic analysis of the obtained compounds reveals the occurrence of spontaneous resolution during crystallization. Both the enantiomorphs of compound 1 have been structurally characterized, whereas the resolution of compound 2 is rather poor.
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