In 2009, thousands of babies in China became ill from drinking contaminated milk. To falsely boost the milks protein content, melamine (C3H6N6) was added to diluted milk because of its high nitrogen composition. Unfortunately, melamine forms a precipitate by hydrogen bonding with cyanuric acid (C3H3N3O3), another contaminant present. The resulting stonelike particles caused severe kidney damage in many babies. Draw the hydrogen-bonded complex formed from these two molecules. N NH2 H2N N NH2 C N C C Melamine Cyanuric acid C H O H C N C N N O H O
Melanie LeMay CHEM 224L01 H NMR – Proton Nuclear Resonance Spectroscopy Purpose: The purpose of H NMR also commonly known Proton NMR is to deduce the structure of the molecule using peaks containing multiplicity. Theory: NMR is an analytical tool used to help deduce the structure of organic molecules. It uses the chemical shift, integration, and multiplicity of neighboring protons to help determine which structure is best. NMR can be used for this reason due to the spin state of the nuclei of the proton. HNMR detects the carbonhydrogen framework of an organic compound. The machine works by applying a magnetic field that orientates the atomic nucleus. There are two possible spin states for the H atom, when perf
