The cyclic structure of glucose is given below. The red bond to the OH group attached to C1 means that the OH can either be up or down; so, there are two structures for glucose. Draw chair representations of the two molecules in their more stable chair conformations. Assign the stereochemistry at C1 and C5 according to the Cahn-Ingold-Prelog convention. OH но Ho OH

What is the relationship (same, enantiomers, or diastereomers) between the following two molecules? You should find the absolute configuration at the stereo center to answer this question. H CH... HS CH₂OH HOH₂C H SH

5. (a) Identify the relationship of the two compounds below. (b) Write the most stable chair conformation for each. Br CH₂ and A. identical B. constitutional isomers C. stereoisomers D. unrelated Br CH₂

True or False: 1. The eclipsed conformation of a linear alkane IS called cis, while the anti conformation of an alkane IS called trans. 2. In the conversion of open-chain D-glucose to the ring form, the aldehyde carbon (carbon #1) bonds to the oxygen on carbon number 5 to form a ring that is both PYRANOSE and UNLOCKED.