Sulfur dioxide is a toxic sulfur compound. List one natural source and one industrial source that produce \(\mathrm{SO}_{2}\).
Text Transcription:
SO_2
Tuesday, April 11, 2017 Organic Chemistry 2 Week 10 Notes - Dienes- compounds that contain 2 carbon-carbon double bonds Conjugated dienes- pattern of double bond-single bond-double bond • - Conjugated dienes (or any double-single-double bond pattern) give extra stability because of the delocalized pi bonds • Unconjugated dienes- double bonds are separated by more that one single bond Cumulated dienes- adjacent double bonds • - Addition Reactions with conjugated dienes • Kinetic (rate) control - Occurs at lower temperatures- low establishment of equilibrium - 1,2 additions predominate 1,4 additions because 1,2 addition is faster to form • Activation energy of 1,2 addition is less than that of 1,4 addition - The intermediate contains the less substituted double bond - Examples: addition of HBr at -78 degrees C and addition of Br 2 at -15 degrees C • Follows Maokovnikov’s Rule • Thermodynamic control - Higher temperatures- reversible reactions - 1,4 additions (more stable) predominate 1,2 additions - The intermediate contains the more substituted double bond - Examples: addition of HBr and Br 2 at higher temperatures - Dienes absorb energy in UV light • Beer-Lambert law [A=Ecl] - Determines the relationship between concentration and absorption - A= absorbance 1 Tuesday, April 11, 2017 - E= molar absorptivity M/cm • Coefficient, constant, relates to structure
