Which one of the following compounds (1 to 4) corresponds to the IR spectrum shown? (you can refer to a table of characteristic absorptions) Spectra reproduced with permission from NIST

Question

BlackTom AI · Accepted Answer

The question asks which of the labeled compounds (1 to 4) corresponds to the provided IR spectrum, and the given answer indicates: Cannot be determined without compound structures.

Option a (1): To assess whether this choice could be correct, we would need to know the functional groups present in structure 1. An IR spectrum can show peaks for certain functional groups (e.g., broad O–H around 3200–3550 cm-1, sharp C=O near 1700 cm-1, C≡N around 2220 cm-1, etc.), but without the actual structure we cannot definitively map features to specific bonds. If structure 1 lacks distinguishing absorptions or blends them with other peaks, identification from IR alone could be inconclusive.

Option b (2): The same logic applies. Even if the spectrum displays particular bands, associating them uniquely to structure 2 requires knowledge of which functional groups are present in that molecule. IR spectra can be ambiguous when multiple functional groups overlap or when a molecule contains similar absorptions from different moieties.

Option c (3): Likewise, without seeing the chemical formula or functional groups in structure 3, we cannot confidently assign the spectrum to it. Some absorptions may be characteristic, but multiple structures can share similar IR features, leading to ambiguity.

Option d (4): The absence of structure 4 information means we can't conclude. An IR spectrum might suggest certain functionalities, but without structural context or a table of characteristic absorptions for each compound, misassignment is possible.

In general, infrared spectroscopy provides information about functional groups via characteristic absorptions, but mapping a spectrum to a specific compound among several candidates requires structural details or additional data. Therefore, the correct stance is that the spectrum cannot be uniquely assigned to any one of the four labeled compounds without their structures, explaining why the provided answer is 'Cannot be determined without compound structures.'

Which one of the following compounds (1 to 4) corresponds to the IR spectrum shown? (you can refer to a table of characteristic absorptions) Spectra reproduced with permission from NIST

View Explanation

Log in for full answers

Similar Questions

Which functional group has a characteristic absorption in the 1630-1800 cm-1 region?

Neither N 2 N 2 nor O 2 O 2 are greenhouse gases because BlackTom题目解析

Q11 V2The infrared spectrum of cocaine is shown below. From this spectrum it may be concluded that

Q11 V2The infrared spectrum of cocaine is shown below. From this spectrum it may be concluded that

Which one of the following compounds (1 to 4) corresponds to the IR spectrum shown? (you can refer to a table of characteristic absorptions) Spectra reproduced with permission from NIST

Which one of the following compounds (1 to 4) corresponds to the IR spectrum shown? (you can refer to a table of characteristic absorptions) Spectra reproduced with permission from NIST

A strong signal at 3400 cm–1 in an IR spectrum indicates the presence of what type of bond? (you can refer to a table of characteristic absorptions)

The IR spectrum of an organic compound gives us information about

More Practical Tools for Students Powered by AI Study Helper

Homework AI Solver

Stylized AI Paper Writer

Plagiarism Checker Assistant

Citation AI Academic Writing Tool

In-Class Translation Assistant

AI Note Generator

AI Quiz Answers

Past Exam Questions from University Test Bank

Smart Practice Assistant

Adaptive Practice

Making Your Study Simpler