CHEM235-A F25 Experiment #3 Recrystallization Notes

CHEM235-A F25 Experiment #3: Recrystallization

Objective

• Perform recrystallization to purify a compound, specifically focusing on 2-exo-norbornel.

Title of Analysis

• Low Resolution Electron Ionization (EI) Mass Spectrum of 2-exo-Norbornel.

Mass Spectrum Overview

Relative Intensity

• The intensity levels are represented on a scale from 0 to 100, indicating the abundance of specific ions generated in the mass spectrometry analysis.

Key Data Points

• Relative Intensity Values:

  • 100%

  • 80%

  • 69%

  • 60%

  • 40% (noted twice)

  • 20%

m/z Values and Fragments

• The mass-to-charge ratio (m/z) values noted in the analysis:

  • Fragments corresponding to m/z = 112

  • Fragments corresponding to m/z = 111

  • Fragments corresponding to m/z = 94

Mass Spectrum Peaks

• Notable peaks on the spectrum:

  • m/z = 112: Significant presence indicating possible molecular ions or fragments.

  • m/z = 111: Another key fragment indicating structural information about 2-exo-norbornel.

  • m/z = 94: Also crucial; could indicate further breakdown products or fragments derived from the molecular structure of norbornel.

Visual Representation

• The graph shows relative intensity against m/z values on the X-axis, demonstrating how each fragment contributes to the overall mass spectrum of 2-exo-norbornel.

Implications of Data

• The presence and matching of m/z values to known standards can confirm the identity and purity of the 2-exo-norbornel sample. This mass spectrum will serve as a pivotal element in evaluating the recrystallization process and success.

Applications

• Understanding the fragmentation patterns and the molecular weight of 2-exo-norbornel can aid in confirming the effectiveness of recrystallization and guide further experimental processes in organic synthesis.