Draw the HOMO of the following 5-carbon conjugated pi systems and draw the thermal and photochemical electrocyclic ring closure reaction for each one. Determine whether each ring closure mechanism involves either a conrotatory or a disrotatory motion. 1. H2C=CH-CH=CH-CH,(+) 2. H2C=CH-CH=CH-CH,-)

Draw the HOMO of the following 5-carbon conjugated pi systems and draw the thermal and photochemical electrocyclic ring closure reaction for each one. Determine whether each ring closure mechanism involves either a conrotatory or a disrotatory motion. 1. H2C=CH-CH=CH-CH,(+) 2. H2C=CH-CH=CH-CH,-)

Organic Chemistry: A Guided Inquiry

2nd Edition

ISBN:9780618974122

Author:Andrei Straumanis

Publisher:Andrei Straumanis

Chapter14: Elimination

Section: Chapter Questions

Problem 46CTQ

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Concept explainers

Alkynes

Alkynes are organic compounds that contain at least one triple bond between carbon-carbon atoms. They are a series of unsaturated compounds with a general molecular formula, CnH2n-2.

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Draw the HOMO of the following 5-carbon conjugated pi systems and draw the thermal and photochemical
electrocyclic ring closure reaction for each one. Determine whether each ring closure mechanism involves
either a conrotatory or a disrotatory motion.
1. H2C=CH-CH=CH-CH2
(+)
2. H2C=CH-CH=CH-CH,-)

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