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Insights into the Nature of Self‐Extinguishing External Donors for Ziegler-Natta Catalysis: A Combined Experimental and DFT Study

Raj, K. Vipin and Kumawat, Jugal and Dhamaniya, Sunil and Subaramanian, Murugan and Balaraman, Ekambaram and Gupta, Virendra Kumar and Vanka, Kumar and Grubbs, Robert H. (2020) Insights into the Nature of Self‐Extinguishing External Donors for Ziegler-Natta Catalysis: A Combined Experimental and DFT Study. ChemCatChem . ISSN 1867-3880. (In Press) https://resolver.caltech.edu/CaltechAUTHORS:20201027-085106547

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Abstract

Developing donors for Ziegler‐Natta (ZN) catalysis to control the polymerization reaction and produce polymers with desirable properties has always been challenging due to the multi‐component nature of the catalytic systems. Here, we have developed a new synthetic protocol for making two external donors, D 1 (2,2,2‐trifluoroethyl myristate) and D 2 (2,2,2‐trifluoroethyl palmitate) that show self‐extinguishing properties, followed by a systematic DFT study to understand this peculiar property of these donors. D 1 and D 2 can undergo parallel reactions with aluminum and titanium species present in the system to produce ketones and aldehydes, which are poisons for ZN catalytic systems, thus explaining their self‐extinguishing nature. The non‐covalent interaction between the long alkyl chain of the donors with the surface plays a vital role in determining the donors' self‐extinguishing nature. There is a significant thermodynamic preference for the binding of the donor with the longer alkyl chain at the titanium center. The current work, therefore, provides interesting insights into how self‐extinguishing donors function in ZN catalytic systems.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1002/cctc.202001493DOIArticle
ORCID:
AuthorORCID
Grubbs, Robert H.0000-0002-0057-7817
Additional Information:© 2020 Wiley‐VCH GmbH. Accepted manuscript online: 22 October 2020; Manuscript accepted: 22 October 2020; Manuscript revised: 21 October 2020; Manuscript received: 15 September 2020. K. V. R. wishes to acknowledge CSIR for providing senior research fellowship. K. V. R. and K. V. also acknowledge the Multi-Scale simulation and Modeling project – MSM – for the computational facilities. K. V. also thanks DST-SERB (EMR/2014/000013) for providing financial assistance. E. B. acknowledges IISER-Tirupati and SERB, India (Grant No: CRG/2018/002480/OC).
Funders:
Funding AgencyGrant Number
Council of Scientific and Industrial Research (India)UNSPECIFIED
Department of Science and Technology (India)EMR/2014/000013
Science and Engineering Research Board (SERB)CRG/2018/002480/OC
Subject Keywords:Ziegler-Natta catalysis; self-extinguishing; donors; non-covalent interactions; DFT
Record Number:CaltechAUTHORS:20201027-085106547
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20201027-085106547
Official Citation:Raj, K.V., Kumawat, J., Dhamaniya, S., Subaramanian, M., Balaraman, E., Gupta, V.K., Vanka, K. and Grubbs, R..H. (2020), Insights into the Nature of Self‐Extinguishing External Donors for Ziegler‐Natta Catalysis: A Combined Experimental and DFT Study. ChemCatChem. Accepted Author Manuscript. doi: 10.1002/cctc.202001493
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:106293
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:27 Oct 2020 16:59
Last Modified:27 Oct 2020 16:59

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