### Chemical Analysis and Spectrum Interpretation#### 17) Chemical Formula: C₁₂H₁₈This section contains an NMR spectrum with several key features, labeled as follows:- **4H, Doublet, Triplet, Triplet, Doublet**: This set of peaks appears between approximately 7 and 8 PPM. These peaks correspond to the presence of hydrogen atoms (H) in the molecule, indicating multiplet configurations due to neighboring hydrogen atoms.- **Quartet, 2H**: Located around 3 PPM, this peak suggests a group of hydrogens in close proximity, influenced by adjacent atoms, resulting in a quartet splitting pattern.- **Singlet, 9H**: Found at roughly 1 PPM, this indicates a group of nine equivalent hydrogen atoms not coupled with any neighboring hydrogens, producing a singlet peak.- **Triplet, 3H**: Appearing near 0.9 PPM, representative of three hydrogens in a triplet configuration due to coupling with neighboring hydrogens.The handwritten note provides a calculation related to the molecular formula: \( 12 \times 2 = 28 - 18 = 8 \frac{1}{2} = 4 \).#### 18) Chemical Formula: C₉H₁₂OIn this part, there is a note regarding Infrared Spectroscopy (IR):- **IR: Strong broad peak at 3200 cm⁻¹**: This indicates the presence of a functional group, typically associated with O-H stretching in alcohols or acids, due to the broad nature of the peak.Additionally, a handwritten math note is present: \( 9 \times 2 = 18 + 2 = 20 - 12 = 8 \frac{1}{2} \).This analysis provides insight into the molecular structures represented in the spectra, aiding in the identification of the compounds in question.

1H-nmr provides the information of hydrogen environment of the unknown compound.

Answered: -8 17) Chemical Formulae: C₁2H18 4H,…

-8 17) Chemical Formulae: C₁2H18 4H, Doublet Triplet Triplet Doublet 6 12×2=26-18=812=4 PPM Quartet, 2H Singlet, 9H Triplet, 3H

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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