Fluorotetrasilicic mica

In addition to other polystyrene [138] and silica supports [139, 140, 141, 142, 143,144], iron and cobalt precatalysts have been immobilised on calcosilicate [145], magnesium dichloride [146,147,148,149], MCM-41 zeolite [150,151], clay [152] and fluorotetrasilicic mica [153], Supported systems have also been examined using alternative activators [154, 155, 156, 157, 158, 159]. For example, silica- and alumina-supported samples 5 have been activated with AK/ -Bu), to afford highly active, thermally robust catalysts [154], IR spectroscopy in DRIFT mode... 

Fluorination, 30 293-294 catalysis, early development, 39 332-334 Fluorine isotope, NMR properties, 33 213, 274 p-Fluoronitrobenzene, 42 168, 171 Fluorotetrasilicic mica... 

Lateral polymerization model, 30 169-170 Lattice oxygen, 27 191, 32 118-121 chemical nature of, 27 195, 196 role of, 27 191-195 Lattice parameters, Cn/ZnO, 31 247 Layer lattice silicates, catalysts, 39 303-326 catalyst solution immobilization, 39 319-324 2-6-di-fert-butylphenoI liquid-phase oxidation on Cu -TSM, 39 322-324 propylene gas-phase oxidation on Cu Pd -TSM, 39 320-322 materials, 39 305-307 metal ion-exchanged fluorotetrasilicic mica, 39 306-308... 

Fe(III)-exchanged fluorotetrasilicic mica acts as a highly effective and reusable catalyst for solvent-free Michael reactions of P-oxo esters with MVK (41a). The immobilized catalyst shows higher activity than homogenous Fe(III) catalysts. Product 42a (cf. Scheme 8.27), for example, is formed in 99% yield even if the catalyst is reused four times [92]. 

Catalytic Activity of Metal Ion-Exchanged Fluorotetrasilicic Mica... 

The iron catalyst can also be assembled in situ. The Na+ form of fluorotetrasilicic mica was ion exchanged with Fe +, then the iron-modified clay was treated with a solution of a bis(imino)pyridine ligand in l-butanol.i Formation of the intercalated metal complexes was inferred by the appearance of the characteristic u(C = N) mode at 1588cm i and an increase in the basal spacing of the clay from 1.0 to 1.6nm for XXIII and XXIV. The bulkier XXII apparently did not form due to the inability of the ligand to penetrate the interlayer space. 

Kurokawa, H., Matsuda, M., Fujii, K., Ishihama, Y, Sakuragi, T, Ohshima, M., and Miura, H. 2007. Bis(imino)pyridine iron and cobalt complexes immobilized into interlayer space of fluorotetrasilicic mica Highly active heterogeneous catalysts for polymerization of ethylene. Chemistry Letters 36 1004—1005. 

Kondo T, Yamamoto K, Sakuragi T, Kurokawa H, Miura H (2012) Acetyliminopyridineiron (III) complexes immobilized in fluorotetrasilicic mica interlayer as efficient catalysts for oligomerization of ethylene. Chem Lett 41 461 63. doi 10.1246/cl.2012.461... 

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