Hello, can you give me explanations as to why the answers in red to these questi
ID: 1067545 • Letter: H
Question
Hello, can you give me explanations as to why the answers in red to these questions are correct?
You observe a compound that exhibits a mass spectrum with peak at 160 and a peak at 162, both of equal intensity. This compound contains: A) Two chlorine atoms B)One iodine atom C) One bromine atom D) Two bromine atoms Which of the following statements is (are) accurate about the IR spectrum of compounds I, II, and in below? A) Compound I shows absorptions at 2950 and 1700 cm^-1. B) Compound II shows absorptions at 3200-3600 and 1650 cm^-1. C) Compound III shows absorptions at 3200-3600 and 2950 cm^-1. D) Both (Compound I shows absorptions at 2950 and 1700 cm^-1) and (Compound II shows absorptions at 3200-3600 and 1650 cm^-1) are true. Markovnikov addition of HBr to CH_3 CH=CH_2 involves which of the following? A) Initial attack by bromide anion (Br^-). B)Initial attack by bromine radical (Br). C) Formation of a primary carbocation. D) Formation of a secondary carbocation.Explanation / Answer
(27) Because Br can have two isotopes with isotopic mass of Br - 79 and Br - 81
(28) Compound I gives at around 1700 cm-1 corresponding to - CO - group and a peak at around 2950 cm-1 corresponding to sp3 C - H bond.
Compound II gives a peak at 1650 cm-1 corresponds to c = c bond and a peak at around 3200 - 3600 cm-1 corresponds intermolecular H - bonding due to -OH group.
(29) Markovnikoff's rule conisders the stability of carbocation to form major compound.
It involves the formation of secondary carbocation intermediate which gives major addition compound further.
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