Chem 219 Orgo Ch 7 Exam Questions with Correct Solutions

Chem 219 Orgo Ch 7 Exam Questions with Correct Solutions What is a heterocycle? - Answer -A cyclic compound which contains at least one other element that is not carbon or hydrogen What group composes the largest class of organic compounds? - Answer -Heterocycles What are the most common heteroatoms? - Answer -Oxygen, nitrogen, and sulfur Nicotine - Answer - a-terthienyl - Answer -B: marigold odor Coumarin - Answer -inhibits vitamin K What are the 2 subclasses of heterocyclic compounds? - Answer -Aromatic and aliphatic How does pyridine differ from benzene? - Answer -BP is increased by 35 degrees Celsius Nitrogen replaces Carbon on C-1 How is pyridine like benzene? - Answer -Flat molecule Hexagonal geometry 120 degree bond angle sp2 hybridizied T/F: Pyridine is miscible with water - Answer -T Why is pyridine miscible in water? - Answer -Can accept hydrogen bonds due to the lone pairs on the nitrogen atom Nitrogen is electronegative, allowing dipole movement of the molecule which makes pyridine a polar molecule Solubility difference brought on by the difference in BP Pyridine is a _____ ______ and reacts with ______ _______ to form _______ _______ - Answer -weak base strong acid pyridinium salts