A study concerning the effect of organoboron compounds in 1-hexene polymerization catalyzed by Cp*TiMe2(O-2,6-iPr2C6H3). Structural analysis for Cp*TiMe2(O-2,6-iPr2C6H3) and Cp*TiMe(CF3SO3)(O-2,6-iPr2C6H3)

Synthesis and structural analysis of phenoxy-substituted half-titanocenes with different anionic ligands, Cp*TiX(Y)(O-2,6-iPr2C6H3): Effect of anionic ligands (X,Y) in ethylene/styrene copolymerization

“…Both the bis(phenoxide) analogue (4) and the mono alkoxo analogue (5) Table 1 summarizes selected bond angles and distances including the reported data by Cp*TiCl 2 (O-2,6-i Pr 2 C 6 H 3 ) (1) [8] and the dimethyl analogue [33]. We previously demonstrated on the basis of crystallographic analysis results in Cp*TiX(Y)(O-2,6- Table 2 summarizes the selected results and the detailed data concerning the temperature dependence are plotted in Fig.…”

The Effect of SiMe3 and SiEt3Para Substituents for High Activity and Introduction of a Hydroxy Group in Ethylene Copolymerization Catalyzed by Phenoxide‐Modified Half‐Titanocenes

“…[4c, 15, 16a] In contrast, the angle in 5 is rather small (163.96(10)8). The TiÀO distances in 5-7 (1.7919(11), 1.787(4), 1.7965 (19) , respectively) are rather long compared to 1, 2 (1.772(3), 1.777(4) , respectively), [15,16] whereas no apparent differences were observed in the other bond distances and angles (Supporting Information, Table S7-2). [14] Ethylene polymerizations by 1-7 were conducted in toluene in the presence of MAO (Ti 1.5 10 À8 mmol (0.015 mmol), ethylene 4 atm, 25 8C, 10 min, MAO 3.0 mmol; Supporting Information, Table S2-1).…”

The Effect of SiMe3 and SiEt3Para Substituents for High Activity and Introduction of a Hydroxy Group in Ethylene Copolymerization Catalyzed by Phenoxide‐Modified Half‐Titanocenes

“…[18] It was revealed that complexes 6 and 7 showed the higher catalytic activities than the others (runs 7, 9 vs. runs 1,3-6) in the ethylene/DD copolymerization at 25 8C. Note that the activities by 6 and 7 increased at 50 8C, whereas decrease in the activity was observed by 1; the similar trend was observed in the ethylene/DC copolymerization (runs [12][13][14][15][16][17]. The activities in the copolymerization with DD by 3-5 were lower than that by 1, whereas improvements in the activities by 2-4 were seen at 50 8C (Supporting Information, Table S3-1).…”

“…[14] It turned out that the Ti-OÀC angles in 6, 7 (172.5(3), 174.62-(19)8 for 6, 7, respectively) [14] are close to those by complexes 1, [15] 2 [16a] (173.0(3), 174.0(3)8 for 1, 2, respectively). [14][15][16][17] It has been considered that a large Ti-O À C angle affects the high activity due to increased stabilization of the active species by O!Ti p-donation. [4c, 15, 16a] In contrast, the angle in 5 is rather small (163.96(10)8).…”