PPT-Ch 13- Conjugated Unsaturated Systems

Introduction In chapter 8 we saw how important the pi bond was to the chemistry of unsaturated compounds In this chapter we study a special group of unsaturated compounds and again we will find that the pi bond is an important part of the molecule. λ. max. WOODWARD-FEISER RULES FOR CALCULATING . λ. max. INTRODUCTION From the study of the ultraviolet absorption spectra of a large number of compounds, Woodward (1941) gave certain rules for correlating λ max with molecular structure. . 1,2. Colin . S. . Campbell,. 1. Gaylon S. Campbell, . 1,2. Douglas R. . Cobos. , and . 1. Bryan T. . Wacker. 1. Decagon . Devices, Inc. ., Pullman. , . WA. 2. Washington State University, Pullman, WA. Thamer. A. Bin . Traiki. Introduction. Jaundice (. icterus. ) is yellowish discoloration of the skin & sclera as a result of raised level of serum . bilirubin. .. A careful clinical examination cannot detect jaundice until the serum . ,-Unsaturated Aldehydes and Ketones. 18-8. Conjugated unsaturated aldehydes and ketones are more stable than their unconjugated isomers.. Enones, or . ,-unsaturated carbonyl groups, are stabilized by resonance.. 15-5. Molecules containing several fused benzene rings are called . polycyclic benzenoid. or . polycyclic aromatic hydrocarbons. (. PAHs. ).. Common names are used for these systems, since there is no simple naming system for them.. Theory. Like all MOs, the following general rules apply to multiple-center MOs:. Multiple-Center . p. MOs of the Allyl Cation. C. omplete . MO . Energy Diagram . of the . Allyl. . Cation. Buta-1,3-diene . and their uses. What is an emulsifier? Describe it’s structure. . Give one . advantage . and one disadvantage of using pressing rather than distillation to extract vegetable oil. . Advantage. Disadvantage . Thamer. A. Bin . Traiki. Introduction. Jaundice (. icterus. ) is yellowish discoloration of the skin & sclera as a result of raised level of serum . bilirubin. .. A careful clinical examination cannot detect jaundice until the serum . Like all MOs, the following general rules apply to multiple-center MOs:. Multiple-Center . p. MOs of the Allyl Cation. C. omplete . MO . Energy Diagram . of the . Allyl. . Cation. Buta-1,3-diene . MOs. 1990Nature GroupNEWS AND VIEWS Time to make friends of chemists The contemporary chemistry journals deserve to be more widely read not just for what chemists have to say about the natural world but f : What does it all mean? Don Mercer Associate Professor, Department of Food Science University of Guelph It seems like everywhere we turn, we’re being bombarded with technical terms that are over – . a case . study. in Norway. Aim. . of. . the. . study. This study aims to provide insights on considering climate boundary conditions, including rainfall, snowmelt, climate variables and vegetation cover, to the stability of an unsaturated slope prone to failure in Norway.. Rawashdeh. , MD, . MSc. , FRCP, FRCPCH. Professor of Pediatrics . & . Gastroenterology. Jaundice: Definition. Yellow staining of the skin and sclera by abnormally high blood levels of the bile pigment .