Microstructure Control of Ethene Homopolymers Through Tailored Ni,Pd(II) Catalysts - Late Transition Metal Polymerization Catalysis - page 36

Fig. 2.7 Schematic illustration of the most relevant bond angles for 4a-c .

Fig. 2.8 Influence of para substituents on the
distortion angle . A strong increase in was

observed when enhancing the steric demand
of the groups at the 4-position.

-angles can be regarded as an indication of the steric
shielding of the metal center with respect to the virtual apical positions of the co-
ordination polyhedron. The

The cones defined by the

-values are practically identical for 4a , b (Fig. 2.7:

127.0 in

4c . This effect is again attributed to the strong repulsive interaction between the

, 125.6 , respectively). Interestingly, is significantly increased to 138.6