Question

1. Which fabric(s) gave the most intense colors with each of the dyes synthesized in this lab? a) b) What are key structural differences between the chemical structures of the fibers which gave intense color and the fibers that showed much less color intensity? (See Discussion Section of On-line Lab Manual for structures of the fabrics or Figure 1 in the lab manual) 2. Give the starting amine and the phenolic compound that would be used in the synthesis of the following commercial azo dye called Sudan Red G? .OH 3. Write a complete mechanism showing intermediates and electron flow with curvy arrows for the electrophilic aromatic substitution reaction shown below. OH OH

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Answer 1

Colours of dyes depend on chromophore and auxochrome more electroni donating group shift the azobenzene dies to bathochromic shift ATHENTOH FINENJ NM- 347 mm 386mm Parde on NEM starting Material will be: con + HN

Dons D VENC .024 -NEN aromatic This is an Seebstitution electrophilic reaction..