Disorder effects in Mn(12)-acetate at 83 K.
The structure of hexadeca-mu-acetato-tetraaquadodeca-mu(3)-oxo-dodecamanganese bis(acetic acid) tetrahydrate, [Mn(12)O(12)(CH(3)COO)(16)(H(2)O)(4)] x 2CH(3)COOH x 4H(2)O, known as Mn(12)-acetate, has been determined at 83 (2) K by X-ray diffraction methods. The fourfold (S(4)) molecular symmetry is disrupted by a strong hydrogen-bonding interaction with the disordered acetic acid molecule of solvation, which displaces one of the acetate ligands in the cluster. Up to six Mn(12) isomers are potentially present in the crystal lattice, which differ in the number and arrangement of hydrogen-bonded acetic acid molecules. These results considerably improve the structural information available on this molecular nanomagnet, which was first synthesized and characterized by Lis [Acta Cryst. (1980), B36, 2042-2046].
Cornia
Andrea
A
Dipartimento di Chimica e INSTM, Università di Modena e Reggio Emilia, Via G. Campi 183, I-41100 Modena, Italy. acornia@unimo.it
Fabretti
Antonio Costantino
AC
Sessoli
Roberta
R
Sorace
Lorenzo
L
Gatteschi
Dante
D
Barra
Anne-Laure
AL
Daiguebonne
Carole
C
Roisnel
Thierry
T