Journal Article Ligand-directed synthesis of {MnIII5} twisted bow-ties

Heras Ojea, María José  ,  Hay, Moya A.  ,  Cioncoloni, Giacomo  ,  Craig, Gavin A.  ,  Wilson, Claire  ,  Shiga, Takuya  ,  Oshio, Hiroki  ,  Symes, Mark D.  ,  Murrie, Mark

46 ( 34 )  , pp.11201 - 11207 , 2017-09 , Royal Society of Chemistry
Two isostructural polymetallic complexes [MnIII5(μ3-O)2(CH3COO)4(L1)4]− and [MnIII5(μ3-O)2(CH3COO)4(L2)4]− have been synthesised by using two Schiff base ligands derived from 3,5-diamino-1,2,4-triazole, following two different preparative routes, either using the pre-formed ligand (for L1) or via a metal-mediated template synthesis (for L2). The {MnIII5} structure is unusual, being based on two corner-sharing perpendicular {Mn3} triangles forming a twisted bow-tie. The magnetic studies reveal antiferromagnetic coupling between Mn(III) ions while electrochemical experiments are consistent with a quasi-reversible Mn(III)↔Mn(IV) redox process at the central manganese ion.

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