Casagrande, O. L.Tomita, K.Mauro, A. E.Vollet, D. R.2014-05-202014-05-201996-01-01Polyhedron. Oxford: Pergamon-Elsevier B.V., v. 15, n. 23, p. 4179-4183, 1996.0277-5387http://hdl.handle.net/11449/39052The carbonyl complexes [WCl(CO)(3)(bipy) (HgCl)] (1), [Fe(CO)(4)(HgCl)(2)] (2) and W(CO)(6)] (3) were immobilized on a silica gel surface organofunctionalized with piperazine groups. The products obtained were studied by IR spectroscopy and small angle X-ray scattering (SAXS) techniques. The IR data show that the immobilization of heterobimetallic compounds 1 and 2, on the functionalized surface, occurred through the mercury atom, while for 3 the displacement of one CO group by the nitrogen of a piperazine molecule was observed. The data obtained from SAXS indicate that particles have a uniform size and reveal suitable modifications on the functionalized surface after immobilization of metal carbonyl complexes. The average intermolecular distance (l(ij)) for piperazine ligands on support is 8.7 Angstrom, for the metal carbonyl complex 1 it is 18.8 Angstrom, for complex 2 it is 16.2 Angstrom and for complex 3 it is 15.3 Angstrom. Copyright (C) 1996 Elsevier B.V. Ltd4179-4183engmetal carbonylimmobilizationsilica gelpiperazineinfrared spectroscopysmall angle X-ray scatteringArtigo10.1016/0277-5387(96)00174-XWOS:A1996VH90500009Acesso restrito2661573794233385