What are the structural characteristics of DMA and DEA that influence their interaction with the Ziegler–Natta catalyst?

Label:chem

Topic
The electronic and steric properties of DMA and DEA play a crucial role in their ability to form complexes with TEAL and interact with the catalyst surface. Understanding these characteristics helps explain their deactivating effects.
Answer
DMA has a lower steric hindrance (buried volume of 40.2%) compared to DEA (buried volume of 51.4%), making it easier for DMA to coordinate with TEAL and adsorb onto the catalyst surface. Additionally, DMA has a slightly higher electrophilicity index (20.06 kcal/mol) compared to DEA (19.87 kcal/mol), indicating that DMA can more readily accept electrons and form stronger complexes.
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