|Conţinutul numărului revistei|
| SM ISO690:2012|
MELNYK, Silvia; SHOVA, Sergiu; BENNISTON, Andrew; WADDELL, Paul G.. Evolution of manganese-calcium cluster structures based on nitrogen and oxygen donor ligands. In: CrystEngComm. 2017, nr. 19(26), pp. 3674-3681. ISSN 1466-8033.
|Numărul 19(26) / 2017 / ISSN 1466-8033|
Several X-ray determined structures are described of ditopic clusters based on the Mn(m)Ca(n) motif where m = 2, n = 2; m = 6, n = 2. A cuboid arrangement of Ca2Mn2O6 is observed in three structures and they vary slightly in terms of Mn-O and Ca-O bond lengths. A "wheel and axle" like motif is observed in the final structure in which a calcium thread resides inside a Mn6 ring. Crystal packing features are also described for the cuboid structures and subtle structural changes are discussed in the framework of supramolecular chemistry and crystal engineering.