Chemical Implantation of Group 4 Cations on Silica via Cyclopentadienyl- and N,N-Dialkylcarbamato Derivatives
| Autor: | Claudia Forte, Filippo Renili, Calogero Pinzino, Guido Pampaloni, Lucia Calucci |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2010 |
| Předmět: |
Cyclopentadiene
Inorganic chemistry Pentamethylcyclopentadiene Nuclear magnetic resonance spectroscopy Medicinal chemistry law.invention Inorganic Chemistry Metal Silanol chemistry.chemical_compound Cyclopentadienyl complex chemistry law visual_art Materials Chemistry visual_art.visual_art_medium Amine gas treating Physical and Theoretical Chemistry Electron paramagnetic resonance |
| Zdroj: | Inorganica Chimica Acta (Testo stamp.) 363 (2010): 33–40. doi:10.1016/j.ica.2009.10.004 info:cnr-pdr/source/autori:Calucci, Lucia; Forte, Claudia; Pampaloni, Guido; Pinzino, Calogero; Renili, Filippo/titolo:Chemical implantation of Group 4 cations on silica via cyclopentadienyl-and N,N-dialkylcarbamato derivatives/doi:10.1016%2Fj.ica.2009.10.004/rivista:Inorganica Chimica Acta (Testo stamp.)/anno:2010/pagina_da:33/pagina_a:40/intervallo_pagine:33–40/volume:363 |
| DOI: | 10.1016/j.ica.2009.10.004 |
| Popis: | Chemical implantation of Group 4 cations [Ti(III), Ti(IV), Zr(IV), Hf(IV)] has been carried out under mild conditions by the reaction of polycyclopentadienyl- (MCp n ; M = Ti, n = 3, 4; M = Zr, Hf, n = 4), mixed cyclopentadienyl/ N , N -dialkylcarbamato (ML x (O 2 CNEt 2 ) y ; M = Ti, L = Cp, C 5 Me 5 (Cp*), x = 2, y = 1; M = Hf, L = Cp, x = 1, y = 3), and N , N -dialkylcarbamato (M(O 2 CNR 2 ) n , M = Ti, n = 3, R = i Pr; M = Ti, Hf, n = 4, R = Et; M = Zr, n = 4, R = i Pr) derivatives, with the silanol groups of amorphous silica. Cyclopentadiene/pentamethylcyclopentadiene and/or carbon dioxide and the secondary amine are released in the process. The amount of implanted cations depends on the metal and on the ligands, the pentamethylcyclopentadienyl complex being less reactive than the unsubstituted congener. The starting complexes and the final products have been characterized by EPR or by 13 C CP-MAS NMR spectroscopy. |
| Databáze: | OpenAIRE |
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