Skip to main content
Ch. 14 - Structural Identification 1: Infrared Spectroscopy and Mass Spectrometry
Mullins - Organic Chemistry: A Learner Centered Approach 1st Edition
Mullins1st EditionOrganic Chemistry: A Learner Centered ApproachISBN: 9780137566471당신이 사용하는 게 아니라요?교과서 변경
모든 교과서Mullins 1st EditionCh. 14 - Structural Identification 1: Infrared Spectroscopy and Mass Spectrometry문제 31
13장, 문제 31

The presence of what atom is indicated by the following mass spectrum?
<IMAGE>

검증된 단계별 안내
1
Examine the mass spectrum for the presence of a molecular ion peak, which is the peak with the highest m/z value. This peak represents the molecular weight of the compound.
Look for any characteristic isotope patterns. For example, chlorine and bromine have distinct isotope patterns due to their natural isotopic abundances (Cl: 35 and 37, Br: 79 and 81).
Identify any significant peaks that are 1 or 2 m/z units apart, which could indicate the presence of isotopes such as carbon (C-12 and C-13) or nitrogen (N-14 and N-15).
Check for the presence of a peak at m/z = 18, which could indicate the presence of water (H2O) or a hydroxyl group (OH).
Consider the presence of a peak at m/z = 15, which is often indicative of a methyl group (CH3).

비슷한 문제에 대한 검증된 영상 답변:

이 영상 해법은 위 문제에 도움이 된다고 튜터들이 추천한 것입니다.

주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

Mass Spectrometry

Mass spectrometry is an analytical technique used to measure the mass-to-charge ratio of ions. It helps identify the composition of a sample by analyzing the mass spectrum, which displays the masses of detected ions and their relative abundances. Understanding how to interpret these spectra is crucial for identifying specific atoms or molecules present in a sample.
추천 영상:
01:25
How to Read a Mass Spectrum

Isotopic Patterns

Isotopic patterns refer to the distinct mass spectral peaks that arise due to the presence of isotopes of an element. Different isotopes have different masses, and their relative abundance can create characteristic patterns in a mass spectrum. Recognizing these patterns is essential for identifying elements, as certain isotopes are unique to specific atoms.
추천 영상:
08:06
Common Splitting Patterns

Fragmentation

Fragmentation in mass spectrometry involves the breaking of molecular bonds, resulting in smaller ion fragments. These fragments can provide information about the structure of the original molecule. Understanding fragmentation patterns helps in deducing the presence of specific atoms or functional groups within a compound, as certain atoms may lead to characteristic fragmentation behaviors.
추천 영상:
12:08
Simple Fragmentation Mechanisms
관련 실천
교과서 질문

Besides the molecular mass, how do you know that the fragment that gives rise to the peak at m/z 111 in the mass spectrum for 1-bromo-4-chlorobenzene contains only chlorine?

<IMAGE>

1051
views
교과서 질문

The molecule that gave the mass spectrum shown here contains a halogen. Which halogen is present?

<IMAGE>

1340
views
교과서 질문

Match each of the four IR spectra to one of the given compounds. [One of the compounds does not match a spectrum.]

(c) <IMAGE>

1297
views
교과서 질문

In the mass spectrum of hexan-3-ol, identify the fragments arising from two α-cleavage fragmentations and one dehydration fragmentation.

<IMAGE>

1206
views
교과서 질문

Match each of the four IR spectra to one of the given compounds. [One of the compounds does not match a spectrum.]

(d) <IMAGE>

908
views
교과서 질문

The molecular ion (M) is significant in the mass spectrum of benzyl fluoride, but it is barely present in the mass spectrum of benzyl iodide. Why might this be the case?

<IMAGE>

972
views