Oranges, colorant problems with

Problem 13.41. An unknown is either hexene or hexanol. Shaking the unknown with a few drops of acidic dichromate solution (orange color) results in a green solution. Identify the unknown and explain how you arrive at your answer. 

PROBLEM 14.75 2,4-Dinitrofluorobenzene is a better electrophile for SNAr reactions than the corresponding chloride (see Fig. 14.95). 2,4-Dinitrofluorobenzene reacts with amines at room temperature to give orange-colored adducts. Show the mechanism of the reaction between 2,4-dinitrofluorobenzene and dimefhylamine. Predict the product. Why is the fluoride more reactive than the chloride Why is the product highly colored ... 

Various industrial sectors related to textiles, paper, and photography use dyes of synthetic origin with a complex aromatic molecular structure, which are frequently discharged in industrial effluents. One solution to these environmental problems is to use oxidative enzymes that destroy colored compounds and that may be of practical interest for the decolorization of synthetic dyes. Enzymes such as LiPX and MnPX are involved in the decolorization of synthetic azo dyes, such as Acid Orange II. 

Rifampicin (child 10 mg/kg up to) 600 mg (<50kg 450 mg) orally, for 6 months 15 mg/kg up to 900 mg orally, for 6 months 15 mg/kg up to 600 mg orally, for 6 months GI upset Hepatitis Bleeding problem Flu-like symptoms Rash Significant interactions with many drugs. Colors body fluids orange. May discolor soft contact lenses... 

A. Ethambutol is associated with retrobulbar neuritis, resulting in loss of central vision and impaired red-green discrimination. Ethionamide (B) is an analogue of isonicotinic acid and is associated with GI intolerance and peripheral neuropathy, but not the optic neuritis or color vision discrimination problems. Aminosalicylic acid (C) can cause GI irritation and bleeding problems, so caution is required in peptic ulcer patients. It has no neurological side effects. Rifampin (D) is associated with red-orange discoloration of saliva, tears, and urine but not the color vision problems. Isoniazid (E) is associated with peripheral neuritis in chronic alcoholics and malnourished individuals and requires pyridoxine supplements. It is not associated with optic neuritis. 

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