
Ziegler – Natta catalyst is:
(A) \[Ni + TiC{l_4}\]
(B) \[RLi + SnC{l_2}\]
(C) \[{({C_2}{H_5})_3}Al + TiC{l_4}\]
(D) \[{({C_2}{H_5})_3}Al + SnC{l_4}\]
Answer
126.6k+ views
Hint: To answer this question, we must recall the concept of polymerization. Olefins are polymerized efficiently with high linearity and stereoselectivity in presence of Ziegler Natta catalysts.
Complete step by step solution:
We should try to remember that a typical Ziegler – Natta catalyst comprises a transition metal and an organoaluminium compound. The Ziegler-Natta catalysts include many mixtures of halides of transition metals, especially titanium, chromium, vanadium, and zirconium and also with organic derivatives of non transition metals, specifically alkyl aluminum compounds.
Traditionally this polymerization was done by radical polymerization but the problem with this technique was that the formation of undesired allylic radicals led to branched polymers. Also, radical polymerization has no control over stereochemistry. Linear unbranched polyethylene and stereo regulated polypropylene could not be produced by free radical polymerization. Thus, the invention of Ziegler – Natta catalyst successfully addressed these two problems.
Hence, the correct answer is Option (C) \[{({C_2}{H_5})_3}Al + TiC{l_4}\].
Additional information:
Among the polyethylene produced by Ziegler – Natta catalyst, there are three major classes: high density polyethylene (HDPE), linear low density polyethylene (LLDPE), and ultra-high molecular weight polyethylene (UHMWPE). HDPE, a linear homopolymer, is widely applied in garbage containers, detergent bottles and water pipes due to its high tensile strength.
Note: We should note, Ziegler – Natta catalysts are effective for polymerization of ethylene and propylene but not in case of disubstituted double bonds. They also do not work when the substrate is acrylate.
Complete step by step solution:
We should try to remember that a typical Ziegler – Natta catalyst comprises a transition metal and an organoaluminium compound. The Ziegler-Natta catalysts include many mixtures of halides of transition metals, especially titanium, chromium, vanadium, and zirconium and also with organic derivatives of non transition metals, specifically alkyl aluminum compounds.
Traditionally this polymerization was done by radical polymerization but the problem with this technique was that the formation of undesired allylic radicals led to branched polymers. Also, radical polymerization has no control over stereochemistry. Linear unbranched polyethylene and stereo regulated polypropylene could not be produced by free radical polymerization. Thus, the invention of Ziegler – Natta catalyst successfully addressed these two problems.
Hence, the correct answer is Option (C) \[{({C_2}{H_5})_3}Al + TiC{l_4}\].
Additional information:
Among the polyethylene produced by Ziegler – Natta catalyst, there are three major classes: high density polyethylene (HDPE), linear low density polyethylene (LLDPE), and ultra-high molecular weight polyethylene (UHMWPE). HDPE, a linear homopolymer, is widely applied in garbage containers, detergent bottles and water pipes due to its high tensile strength.
Note: We should note, Ziegler – Natta catalysts are effective for polymerization of ethylene and propylene but not in case of disubstituted double bonds. They also do not work when the substrate is acrylate.
Recently Updated Pages
JEE Main 2023 (January 30th Shift 2) Maths Question Paper with Answer Key

Know The Difference Between Fluid And Liquid

JEE Main 2022 (July 25th Shift 2) Physics Question Paper with Answer Key

Classification of Elements and Periodicity in Properties Chapter For JEE Main Chemistry

JEE Main 2023 (January 25th Shift 1) Maths Question Paper with Answer Key

JEE Main 2023 (January 24th Shift 2) Chemistry Question Paper with Answer Key

Trending doubts
JEE Main 2025 Session 2: Application Form (Out), Exam Dates (Released), Eligibility & More

JEE Main Login 2045: Step-by-Step Instructions and Details

JEE Main Exam Marking Scheme: Detailed Breakdown of Marks and Negative Marking

JEE Main 2023 January 24 Shift 2 Question Paper with Answer Keys & Solutions

JEE Mains 2025 Correction Window Date (Out) – Check Procedure and Fees Here!

JEE Main Participating Colleges 2024 - A Complete List of Top Colleges

Other Pages
JEE Advanced Marks vs Ranks 2025: Understanding Category-wise Qualifying Marks and Previous Year Cut-offs

NCERT Solutions for Class 11 Chemistry Chapter 7 Redox Reaction

NCERT Solutions for Class 11 Chemistry Chapter 5 Thermodynamics

NCERT Solutions for Class 11 Chemistry Chapter 8 Organic Chemistry

NCERT Solutions for Class 11 Chemistry Chapter 6 Equilibrium

NCERT Solutions for Class 11 Chemistry Chapter 9 Hydrocarbons
