Abstract
The reaction of the reducing aldopentose lyxose towards the metal centres in the copper-based cellulose solvents Schweizer’s reagent (cupric hydroxide in aqueous ammonia) and Cu-en (cupric hydroxide in aqueous ethylenediamine) was investigated. Crystals of the trinuclear complexes [(NH3)4Cu II(β-D-Lyxp1,2,3H−3)2(H2O)2]·4H2 O( 1) and [(en)2Cu II(β-DLyxp1,2,3H−3)2(H2O)2]·4H2 O( 2 )( Lyxp = lyxopyranose) were grown upon preventing Fehling-type aldose oxidation. One of the three cupric centres is coordinated by two chelating diolato ligands only, hence both ammonia and ethylenediam
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