"TITANOCENE AND ansa-TITANOCENE COMPLEXES BEARING 2,6-BIS(ISOPROPYL)PHENOXIDE LIGAND(S). SYNTHESES, CHARACTERIZATION AND USE IN CATALYTIC DEHYDROCOUPLING POLYMERIZATION OF PHENYLSILANE"@en . . . . "RIV/61388955:_____/11:00358409" . . "Merna, J." . "TITANOCENE AND ansa-TITANOCENE COMPLEXES BEARING 2,6-BIS(ISOPROPYL)PHENOXIDE LIGAND(S). SYNTHESES, CHARACTERIZATION AND USE IN CATALYTIC DEHYDROCOUPLING POLYMERIZATION OF PHENYLSILANE" . "P(GA203/09/1574), P(KAN100400701), P(LC06070), Z(AV0Z40400503), Z(AV0Z40720504), Z(MSM0021620857), Z(MSM6046137302)" . . "titatium; metallocenes; polymerization"@en . "Pinkas, Ji\u0159\u00ED" . . . . . . "Collection of Czechoslovak Chemical Communications" . . . "Aryloxychloro and bis(aryloxy) titanocenes of general formula L2TiCl2-x(OAr')(x) where L = eta(5)-C5H5 (x = 1 (1) and 2 (2)), L-2 = SiMe2(eta(5)-C5H4)(2) (x = 1 (3) and 2 (4)), and Ar' = 2,6-(CHMe2)(2)C6H3 were prepared by the reaction of corresponding titanocene dichloride with LiOAr' and characterized by spectroscopic methods and compound 3 by single crystal X-ray diffraction analysis. The bulky aryloxy ligand in 1 and 3 exerts a hindered rotation around the Ti-O bond on the H-1 NMR time scale, resulting in its dynamic behavior in CDCl3 solution. Variable temperature NMR measurements proved the rotation barrier in 3 (Delta G(298)(double dagger) = 13.9 +/- 0.3 kcal/mol) to be lower than that in 1 (Delta G(298)(double dagger) = 14.7 +/- 0.2 kcal/mol) as a consequence of the more open titanocene shell in the ansa-structure of 3."@en . . . . "TITANOCENE AND ansa-TITANOCENE COMPLEXES BEARING 2,6-BIS(ISOPROPYL)PHENOXIDE LIGAND(S). SYNTHESES, CHARACTERIZATION AND USE IN CATALYTIC DEHYDROCOUPLING POLYMERIZATION OF PHENYLSILANE"@en . "[994F3621FCF9]" . "0010-0765" . . . "Aryloxychloro and bis(aryloxy) titanocenes of general formula L2TiCl2-x(OAr')(x) where L = eta(5)-C5H5 (x = 1 (1) and 2 (2)), L-2 = SiMe2(eta(5)-C5H4)(2) (x = 1 (3) and 2 (4)), and Ar' = 2,6-(CHMe2)(2)C6H3 were prepared by the reaction of corresponding titanocene dichloride with LiOAr' and characterized by spectroscopic methods and compound 3 by single crystal X-ray diffraction analysis. The bulky aryloxy ligand in 1 and 3 exerts a hindered rotation around the Ti-O bond on the H-1 NMR time scale, resulting in its dynamic behavior in CDCl3 solution. Variable temperature NMR measurements proved the rotation barrier in 3 (Delta G(298)(double dagger) = 13.9 +/- 0.3 kcal/mol) to be lower than that in 1 (Delta G(298)(double dagger) = 14.7 +/- 0.2 kcal/mol) as a consequence of the more open titanocene shell in the ansa-structure of 3." . "1" . "000286069600007" . "20"^^ . . "10.1135/cccc2010133" . "S\u00FDkora, Jan" . "CZ - \u010Cesk\u00E1 republika" . "3"^^ . . . "TITANOCENE AND ansa-TITANOCENE COMPLEXES BEARING 2,6-BIS(ISOPROPYL)PHENOXIDE LIGAND(S). SYNTHESES, CHARACTERIZATION AND USE IN CATALYTIC DEHYDROCOUPLING POLYMERIZATION OF PHENYLSILANE" . "Gyepes, R." . "RIV/61388955:_____/11:00358409!RIV12-GA0-61388955" . "Hor\u00E1\u010Dek, Michal" . . . "235432" . . "6"^^ . "Kubi\u0161ta, Ji\u0159\u00ED" . "76" . . .