2. Convert each of the following structures to a Fischer projection. (2 points) OH NH, 6 3. Draw all the significant re...
4. Consider the following Fischer Projection: CH, OH I 9 CH OH A Does this represent a monosaccharide, a disaccharide, a trisaccharide or something else? B Are any chiral carbons present? If so, circle each one. C Does this represent an aldose or a ketose? Explain your response and draw a box around the relevant functional group. D Give the molecular formula for this compound. E Is this compound classified as an L-isomer or a D- isomer? your response. Explain...
DUBU Ugraded 1) Draw the enantiomer and a diastereomer of the following Fischer projection in the boxes below Your answers should be in wedge/dash notation (2 points) Original molecule Enantiomer Diastereomer OOH -OH C-Me SH Merci 2) Provide the full IUPAC name for the following molecule (2 point): undecane 3-bromo 4,5-ethyl 6-methyl 8-ethylene Molecule: 9-11-methylethul) Name 3) Use your knowledge of pka's to rank the following from least basic (1) to most basic (5)? (1 point)
For 2-chloro-3-hexanol: Draw the structure of all the possible stereoisomers with Fischer Projection and Perspective Formulas showing both eclipsed and staggered conformations). 2) Assign the configuration of all chiral centers with R or S. (3) Give the complete IUPAC name for each stereoisomers. (4) Indicate the relationship among the structures, indicating which are the threo or erythro enantiomer, and diastereoisomer pairs.
3. . Draw all the possible resonance
structures: (6 points)
4. Write the products or reactants: (12
points)
3.. Draw all the possible resonance structures: (6 points) OCH3 H NO2 a. CH2 CH + H3C CH2 b. H,C 4. Write the products or reactants: (12 points) COOH 0-1 heat COOH a. HBr, leq b.
2.Draw a
Newman projection, a wedge-dash structure and a Fischer projection
for all four stereoisomers of 2-bromo-3-chlorobutane.
The wedge dash
structure is
given for part
a – all you need to do is finish the Newman projection
and the
Fischer
projection.
a.2R,
3R.
On each
structure show how you determined where each group goes.
(part a
only)
b.2S,3S
c.2S,
3R
d.2R,
3S
CH3 Brci CH CH3
1. (2 points each) Draw the chemical structures of the following two compounds. iodoform 71-butanal 2. (2 points) Circle the compound that will give a positive result in the iodoform test. (a) acetophenone b) cyclopentanone c) isobutanol d) n-heptanal 3. (3 points) Convert the following molecule to a Fisher projection. OH | H Convert to a Fisher Projection H DH 1 OHHH HAH HEBH 4. (2 points) Circle the correct name of the following structure. ph a) (meso)-hydrobenzoin H -OH...
3. Using curved arrows draw all the significant (not negligible) contributing resonance structures for the ions or molecules given below. (curved arrows must show how each proposed structure is generated) a) (5 points) b) (5 points) compond ОН n abom nl ( c) (5 points) 24
2. (9 points) Draw the significant resonance structures for the following molecular cation: CH2 Haco
exam prep
IV. Please draw the Fisher projection for each of the following molecules and determine the absolute configuration (S or R) for all chirality centers. (8 pts) H3C OH C (1) H CH3 Вiн-С NO2 CH(CH3)2 (2) V. Please draw the most stable conformation of trans-1-tert-butyl-3- methylcyclohexane and cis-1-tert-butyl-3-methylcyclohexane. (6 points)
IV. Please draw the Fisher projection for each of the following molecules and determine the absolute configuration (S or R) for all chirality centers. (8 pts) H3C OH...
1. Consider the following Fischer projection formulas of 3-amino-2-butanol. Decide which pairs of the formulas are related as enantiomers, which are related as diastereomers, and which represent identical molecules. Assign R or S absolute configuration to C2 and C3 for each structure, and then decide. List your results by letters in the spaces provided below. (5 pts) CH2CH3 O CH3CH2 - NH căH HS CH2CH3 H. NH2 SH CH3CH2CH CH,CH2 C- NH, SH Enantiomeric pairs: Diastereomeric pairs: Identical molecules: