Abstract

CORTES, MARCELA; FUENTEALBA, MAURICIO; MANZUR, CAROLINA  and  CARRILLO, DAVID. A NEW LINDQVIST-TYPE HEXAMOLYBDATE CLUSTER FUNCTIONALIZED WITH THE jt-DONOR LIGAND 4-BROMO-2,6-DIMETHYLPHENYLIMIDO: SPECTROSCOPIC, ELECTROCHEMICAL AND STRUCTURAL STUDIES. J. Chil. Chem. Soc. [online]. 2008, vol.53, n.1, pp. 1349-1352. ISSN 0717-9707.  http://dx.doi.org/10.4067/S0717-97072008000100004.

A new ionic organic-inorganic hybrid complex of formula («-Bu₄N)₂[Mo_(¡0₁₈(NR)]¹/2Me₂CO, R = -C₆H₂-2,6-Me₂-4-Br, (w-Bu₄N)₂[l]-i4Me₂CO, has been prepared in acetonitrile by reacting tetrabutylammonium a-octamolybdate, («-Bu₄N)₄[0t-Mo₈O₂₆], with 2,6-dimethyl-4-bromoaniline hydrochloride, 2,6-Me₂-4-Br-C₆H₂NH₂HCl, using N,N'-dicyclohexylcarbodiimide, (C₆H_U)N=C=N(C₆H₁₁), as dehydrating agent. This complex, formulated as («-Bu₄N)₂[l]¹/2Me₂CO, contains a C-Br group which can be functionahzed for constructing novel hybrid materials. The complex was fully characterized by IR, UV-Vis, 'H- and "C-NMR spectroscopies, and authenticated by single crystal X-ray diffraction analysis. The asymmetric unit contains two crystallographically independent anions, [l]²", differing by the orientation of the phenyl ring relative to the hexamolybdate skeleton, and one molecule of acetone. Both molecules differ in the angles Mo(l)-N(l)-C(l)= 172.2(6) and Mo(7)-N(2)-C(9)= 175.6(6)°. These angles, near to 180°, indicate the presence of a Mo=N triple bond

Keywords : areneimido-derivative; phenylimido-derivative; Lindqvist-type hexamolybdate; polyoxometalate; crystal structure; conformational isomers.