a) In the mass spectra, why do peaks for the molecular ions of the bromotoluene

Question

a) In the mass spectra, why do peaks for the molecular ions of the bromotoluene isomers appear at 170 and 172 instead of 171?

b) Given the shapes of the products and the Na-Y cavities, provide an explanation for the product ratio observed upon Na-Y promotion of the reaction versus the unpromoted reaction. Both 2-bromotoluene and 4-bromotoluene can enter and leave the zeolite with approximately equal ability.

c) How is this result with zeolite catalysis valuable for synthesis

d) Why was it necessary to protect the reaction mixture ( Catalytic Electrophilic Aromatic Bromination of Toluene with Zeolite Na-Y) from light.

Explanation / Answer

a) Because Br gives M+2 peak with M:M+2 = 1:1 intensity.

Br doesnot give M+1 peak so Bromotoulene shows peaks at 170 and 172

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.