Electronic structural effects in the structure of trichloro(η5-ethyltetramethylcyclopentadienyl)titanium(IV), Ti(C11H17)Cl3

Phosphinimides as a Steric Equivalent to Cyclopentadienyl: An Approach to Ethylene Polymerization Catalyst Design

“…The Cp−Ti−N angle in 14 of 131.2° is comparable to the Cp−Ti−Cp angle of 130.96° in Cp 2 TiCl 2 . Moreover, this is significantly larger than Cp−M−N angles of 107.6° and 107.9° found in the “constrained geometry” complexes [(C 5 Me 4 SiMe 2 N- t -Bu)TiCl 2 and [(C 5 Me 4 CH 2 CH 2 N- t -Bu)TiCl 2 37 and nonconstrained cyclopentadienyl−amide complexes (115−120°) . Furthermore, the Cp−Ti−N angle in 14 is significantly greater than the Cp−Ti−O angle found in CpTi(OC 6 H 2 -i -Pr 3 ) 2 Cl (119.2°, 113.1°) .…”

Synthesis, Structures, and Catalytic Reactions of Ring-Substituted Titanium(IV) Complexes

“…71 The anticipated piano stool configuration around the titanium atom was confirmed (Figure 42); also, the Ti-Cl bond distances and the Cl-Ti-Cl angles are very similar to those of the unsubstituted (η 5 -C 5 H 5 )TiCl 3 . 205,206 There is no evidence to suggest any interaction between the phosphorus atom in the side chain and the central titanium atom with the Ti-P distance being 3.525(1) Å.…”