Question

Chapters 21 and 22: 14 1. Consider the structure shown on the right and answer the following (4 questions about it (fill in blanks or circle proper choice). a. Its molecular formula is C H O and so it fits the general formula for a carbohydrate, which is Ca b. Specifically, this structure is (a D/ an L) (aldo/keto) (pent/hex) (ase/ose). c. Will it be optically active?_ d. If the top carbon was converted to a CH,OH, would it be optically active? e. This molecule can form a six membered ring by addition of one of its -OH groups to the C-O group. Draw a circle around the -OH group which would lead to this ring. This is called a (furanose/pyranose) ring. Draw the structure of this ring in the space on the right. f. This molecule can also form a five membered ring by addition of one six member y fonm of its -OH groups to the C-O group. Draw a square around the -OH group which would lead to this ring. This is called a (furanose/pyranose) ring. g. In each of the rings referred to in parts e and f the carbonyl carbon has been carbon. Draw a circle around this carbon converted into a hemi in your ring structure in part e. h. As the rings in parts e and f form, the C O group yields a new chiral center which is called the omeric carbon. This new chiral center has an -OH group which is typically drawn either up or down in its cyclic form. The "up" form is called (α/β) and the down form is called (α/β). In the polysaccharide starch, the the linkages from one saccharide to another are all (a. /P).

1a-h

Answer 1

CG H120 fom and aldo and hexone acho NOナーーーー01 ㄧㄧ ーでな01 REDMI NOTE 5 PRO