Sampani, Stavroula I and Aubert, Sidonie and Cattoen, Martin and Griffiths, Kieran and Abdul-Sada, Alaa and Akien, Geoffrey R and Tizzard, Graham J and Coles, Simon J and Arseniyadis, Stellios and Kostakis, George E (2018) Dinucleating Schiff base ligand in Zn/4f coordination chemistry:synthetic challenges and catalytic activity evaluation. Dalton Transactions, 47 (13). pp. 44786-4493. ISSN 1477-9226
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Abstract
Four Zn/4f polynuclear coordination clusters (PCCs) formulated as [ZnDyL2(CO3)2(NO3)2] (1), [ZnIIYIIIL(NO3)2(o-van) (MeOH)] (MeOH) [2 (MeOH)] and [ZnIILnIIIL(NO3)2Cl(EtOH)] where Ln is Dy (3) and Y (4) and where H2L is the dinucleating Schiff base ligand N,N'-bis(3-methoxysalicylidene)cyclohexane-1,2-diamine and o-van is ortho-vanillin, were prepared and fully characterised for the first time. These air-stable heterometallic PCCs, obtained in high yields from commercially available materials, were shown to remain stable in solution in their dinuclear [ZnIILnIIIL] form. Their catalytic activity was evaluated in various catalytic transformations including the Friedel-Crafts alkylation of 2-acyl imidazoles with indoles.