Diimines structural variation

The effects of variation of the donor substituents and the metal centre have also been investigated in 1320 nm HRS studies with compounds related to 28 and 29 by Le Bozec and colleagues [71, 73], Even though the relatively complicated electronic structures of such tris-(a-diimine) complexes hinders the development of deal structure-activity relationships, the smaller of 30 (298 x 10 ° esu in chloroform) clearly corresponds with a higher ILCT energy when compared with... 

A series of five- and six-coordinate chiral [Mn (salen)] complexes known to be effective AE catalysts has been characterized by X-ray crystallography [56]. Comparison of some of these structures revealed that the ligand geometry around the metal center and the chiral diimine backbone remained remarkably constant, while the salicylidene regions of the complexes adopted a wide range of conformations. The conformational variations observed in the solid state likely reflect accessible solution conformations of the [Mn (salen)] complexes and possibly their oxo counterparts. 

The polymerization catalysts were Ni and Pd diimines. Variations of P, T, and ligands changed the PE structure from branched and amorphous to a linear and semicrystalline, HDPE. Copolymerization of ethylene with functionalized comonomers was found feasible... 

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