Nonadecanuclear Mn7IIMn12II cluster with a spin ground state of S=73/2

Reaction of Mn(ClO4)(2)center dot 6H(2)O with 2,6-bis(hydroxymethyl)-4-methylphenol (H(3)hmmp) in the presence of sodium azide gives rise to a high-nuclearity cluster [(Mn7Mn12III)-Mn-II(mu(4)-O)(8)(mu(1,1,1)-N-3)(8) (Hhmmp)(12)(OH)(2) (H2O)(4)]center dot 24H(2)O that displays a spin ground state as high as 73/2. (C) 2008 Elsevier B.V. All rights reserved.