Organic 2 Review Problem 160

Organic 2 Review Problem 160 - H4 PRACTICAL ORGANIC...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
H4 PRACTICAL ORGANIC CHEMISTRY The following preparation works excellently if it is carried out in a laboratory which has become "inoculated" by the methylglucoside from previous preparations, or alternatively if some of the glucoside is available for "seeding" the solution of the crude material; otherwise there may be a considerable delay before crystallisation starts. Required: Anhydrous glucose, 20 g.; methanol, 40 ml. Add 20 g. of pure powdered anhydrous glucose to 40 ml. of anhydrous methanol (preparation, p. 88) contained in a flask fitted by means of a rubber stopper to a reflux water-condenser: close the top of the condenser with a calcium chloride tube. It is now required to add about 5% of dry hydrogen chloride to the methanol in the flask. For this purpose, fit a corked boiling-tube with two narrow delivery-tubes so that it can act as a wash-bottle: fit the inlet tube to a hydrogen chloride Kipp's apparatus (p. 104) through a concentrated sulphuric acid wash- bottle to ensure thorough drying of the gas, and fit the outlet
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 09/19/2011 for the course CHM 2211 taught by Professor Castalleano during the Fall '06 term at University of Florida.

Ask a homework question - tutors are online