Dr. Erich Brumbaugh
Degree Award Date
NMR Analysis, Alcohol/Water Mixtures, Alcohol/Alcohol Mixture, hydrogen bondings
Biochemistry | Biology | Molecular Biology
Understanding the molecular environment of aqueous solutions is important to both biological and nonbiological systems. The physical characteristics of mixtures such as partial molar volume, density, and heat of mixing have been examined and documented in the past. The effects of hydrogen bonding upon these physical phenomena however are still a mystery. This project used NMR spectra to analyze the change of the electron environment caused by hydrogen bonding of the protons in alcohol/water and alcohol/alcohol mixtures. The solutions analyzed were methanol/water, 1-propanol/water, 2-propanol/water, . 1-propanol/methanol, and 2-propanol/methanol. The results corroborate the literature in that the methyl protons were observed to experience less change in environment than the hydroxyl protons. Also the hydroxyl protons experienced maximum changes most often at around 0.3, 0.5, and 0. 7 mole fraction, which correspond to the stoichiometric ratios of 1 :2, 1 : 1, and 2: 1.
McNeil, Ian, "NMR Analysis of Alcohol/Water and Alcohol/Alcohol Mixtures" (2008). Honors Projects. 184.