摘要:
The titanium derivatives [TiCp * Me(k(3)-ONO-OOCPhN=CHPhO)] (1), [TiCp * Me(k(3)-ONO-OCH2PhN=CHPhO)] (2) and [TiCp * Me(k(3)-ONS-SPhN=CHPhO)] (3) have been synthesized by reaction of [TiCp * Me-3] (Cp* eta(5)-C5Me5) with 2-(salicylideneamino)benzoic acid, 2-(hydroxybenzyl) salicylideneamino or 2-(salicylideneamino) thiophenol, respectively, in a 1:1 M ratio. The reaction of [TiCp * Me-3] with and 2-(salicylideneamino) thiophenol in 1: 2 M ratio yields the titanium compound [TiCp * Me(k(3)-ONS-SPhN=CHPhO)(k(1)-O-PhCHNHPhS)] (5) Complexes 1, 2 and 3 react with (BuNC)-Bu-t to yield the iminoacyl-containing compounds [TiCp * ( eta(2)-CN-MeC=(NBu)-Bu-t)(k(3)-ONO-OOCPhN=CHPhO)] (6), [TiCp * (eta(2)-CN-MeC=(NBu)-Bu-t)(k(3)-ONO-OCH2PhN=CHPhO)] (7) and [TiCp * ( eta(2)-CN-MeC=(NBu)-Bu-t)(k(3)-ONS -SPhN=CHPhO)] (8). Compounds 7 and 8 can be protonated with triflic acid to yield the aminocarbene derivatives (9) and (10), respectively. Moreover, the reaction of complexes 1-3 with triflic acid renders the corresponding triflate compounds [TiCp * ( k(3)-ONO-OOCPhN=CHPhO)(OTf)] (11), [TiCp * (k(3)-ONO -OCH2PhN=CHPhO)(OTf)] (12) and [TiCp * (k(3)-ONS-SPhN=CHPhO)(OTf)] (13). The reaction of 1 or 2 with B(C6F5)(3) in a 1:1 M ratio yields the carboxylate adduct [TiCp * Me(k(3)-ONO-OOCPhN= CHPhO.B(C6F5)(3))] (14) or the cationic derivative. [TiCp * (k(3)-ONO-OCH2PhN=CHPhO)] (2)[MeB(C6F5)(3))](2) (15), respectively. The molecular structures of complexes 2, 5, 6, 13 and 15 have been established by X-ray diffraction methods. (C) 2014 Elsevier B.V. All rights reserved.