In the Third Step in Olefin Metathesis the ____

question 75

Multiple Choice

In the third step in olefin metathesis the ____.

• A)metal alkylidene ([M]=)undergoes a [2+2] pericyclic addition with an alkene alkene to form a metalcyclobutane intermediate
• B)metalcyclobutane undergoes a reverse [2+2] addition (i.e.,retro [2+2] reaction)to generate a new metal alkylidene
• C)reaction of the new metal alkylidene with a new alkene (by [2+2] addition)to generate a new metalcyclobutane intermediate
• D)formation of the alkene product from a retro [2+2] reaction of the second metal alkylidene
• E)alkene reacts with a second alkene by [2+2] addition

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Definitions:

Eukaryotic Chromosomes

Linear DNA molecules contained in the nucleus of eukaryotic cells, associated with a large variety of proteins such as histones, facilitating gene regulation and chromosome organization.

Histone Proteins

Proteins that package and order DNA into structural units called nucleosomes, playing a key role in gene regulation and expression.

Linear DNA

DNA molecules that are structured in a straight or nearly straight line, as opposed to being circular.

Nucleosomes

Structures consisting of a segment of DNA wound around a core of histone proteins, playing a crucial role in the packaging of eukaryotic DNA.