Conjugated pi systems Study guides, Class notes & Summaries

Discusses how conjugation works, and how it affects stability and reactivity of a molecule. Includes information about nomenclature, and shows how pericyclic reactions work, including their mechanisms. The diels alder reaction is focused on.

BIO 3100 Test Banks BIO 3100 Lecture Exam I-A February 14, 2008 1. Universal features of all living cells include all of the following except: (a) nucleus or nucleoid (b) plasma membrane (c) cytoplasm (d) centrosome 2. An open system is one (a) that exchanges neither matter nor energy with its surroundings plasma membrane (b) that exchanges energy but not matter with its surroundings. (c) that exchanges both matter and energy with its surroundings. (d) that exchanges matter but not energy with i...

BIO 3100 Test Banks BIO 3100 Lecture Exam I-A February 14, 2008 1. Universal features of all living cells include all of the following except: (a) nucleus or nucleoid (b) plasma membrane (c) cytoplasm (d) centrosome 2. An open system is one (a) that exchanges neither matter nor energy with its surroundings plasma membrane (b) that exchanges energy but not matter with its surroundings. (c) that exchanges both matter and energy with its surroundings. (d) that exchanges matter but n...

Conjugated pi systems and Diel Alder mechanism

This document contains digitally taken, handwritten notes for the conjugated pi systems chapter. It covers topics on HOMO and LUMO structures, energy levels as well as molecule stability. Notes also cover information dienes, their nomenclature as well as their properties. Thoroughly explained subtopics include 1,2 and 1,4 addition, pericyclic reactions, Diel’s - Alder reaction as well as sigmatropic, Cope and Cleissen rearrangements. Notes show mechanism thoroughly and include explanation as n...

This document is a summary of the conjugated pi systems chapter of the organic chemistry 2 course. It is digitally taken, handwritten notes. It covers topics on HOMO and LUMO structures, energy levels as well as molecule stability. Notes also cover information dienes, their nomenclature as well as their properties. Thoroughly explained subtopics include 1,2 and 1,4 addition, pericyclic reactions, Diel’s - Alder reaction as well as sigmatropic, Cope and Cleissen rearrangements. Notes show mecha...

Org II (Hamann) Chapter 17 HW – Pi Systems Name 1 Draw the structures of the following compounds a) cyclopentadiene (explain why the numbers for the double bonds (1,3-), which are formally require d, are usually omitted. I.e., why is only one isomer possible; why not 1,2- or 1,4-cyclopentadiene? 1,2-cyclopentadiene would contain an allene, a linear C=C=C unit that would make the ring too strained. 1,4- cyclopentadiene would actually be the same molecule, but numbered incorrectly. Hence the use...

What are the four rules for writing resonance structures? Correct Answer 1. Atoms must not be moved. Only electrons. 2. All resonance atoms must lie in the same plane. 3. Only valid Lewis structures are allowed. 4 . The number of unpaired electrons must remain constant. What are the two conditions for resonance? Correct Answer 1. An atom must have a P orbital or a lone pair of electrons. 2. It must be single bonded to an atom that has a double or triple bond. The latter comprom...

What are the four rules for writing resonance structures? Correct Answer 1. Atoms must not be moved. Only electrons. 2. All resonance atoms must lie in the same plane. 3. Only valid Lewis structures are allowed. 4 . The number of unpaired electrons must remain constant. What are the two conditions for resonance? Correct Answer 1. An atom must have a P orbital or a lone pair of electrons. 2. It must be single bonded to an atom that has a double or triple bond. The latter comprom...

conjugated pi systems and pericyclic reactions