Molecular fluorinated alumoxanes: One step towards well-defined fluorinated alumina

• Published in: Inorganic chemistry communications Vol. 13; no. 4; pp. 543 - 545
• Main Authors: González-Gallardo, Sandra, Jancik, Vojtech, de las Nieves Zavala-Segovia, Ma, Moya-Cabrera, Mónica
• Format: Journal Article
• Language: English
• Published: AMSTERDAM Elsevier B.V 01.04.2010; Elsevier
• Subjects: Aluminum; Alumoxanes; Chemistry; Chemistry, Inorganic & Nuclear; Fluorinated alumina; Physical Sciences; Science & Technology; β-Diketiminate ligands; Alumoxanes; Aluminum; β-Diketiminate ligands; Fluorinated alumina; beta-Diketiminate ligands; AEROGELS; BEHAVIOR; HYDRIDES; AB-INITIO; CRYSTAL-STRUCTURES; GAMMA-ALUMINA; FLUORIDES; HYDROXYFLUORIDES; SURFACE
• ISSN: 1387-7003; 1879-0259
• DOI: 10.1016/j.inoche.2010.01.033

The synthesis of the unprecedented molecular fluorinated alumoxane [{LAl(F)} 2(μ-O)] ( 2) and its use as a precursor to obtain a well-defined aluminum hydroxyfluoride [{LAl(F)(μ-OH)} 2] ( 3) by direct hydrolysis is reported. The unprecedented molecular alumoxane [{LAl(F)} 2(μ-O)] ( 2) is easily accessible from the reaction between [{LAl(H)} 2(μ-O)] ( 1) and the mild fluorinating agent Me 3SnF. Furthermore, the controlled hydrolysis of 2 led to the preparation of the binuclear aluminum hydroxyfluoride [{LAl(F)(μ-OH)} 2] ( 3) in a straightforward manner. The compounds were characterized by spectroscopic techniques (IR, EI–MS, solid state MAS NMR ( 13C and 27Al), solution NMR ( 1H, 13C, 19F and 27Al)) and in the case of 3, through X-ray diffraction studies. Compound 3 represents the first example of a molecular aluminum hydroxyfluoride fully structurally characterized.