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Which statement is false concerning a Natta-Ziegler catalyst?

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frosh101:
Which statement is false concerning a Natta-Ziegler catalyst?
◦ A Natta-Ziegler catalyst can be used to promote a polymerization that is selective for isotactic or syndiotactic polymer.
◦ A Natta-Ziegler catalyst containing [Al(C2H5)3] and TiCl3 can be used to promote the formation of specific isomers in a polymerization.
◦ A Natta-Ziegler catalyst is used to make a polymerization thermodynamically favorable.
◦ A Natta-Ziegler catalyst has been used by chemists to design polymers with different properties.

breounasmoot:
A Natta-Ziegler catalyst is used to make a polymerization thermodynamically favorable.

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