orgo uworld

A Epimers are diastereomers that differ in configuration at one position, and anomers are a specific type of epimer that differs at the anomeric carbon. However, for fructose, the anomeric carbon is C2, not C1.

Can α-D-fructose and β-D-fructose be classified as anomers? A. Yes, because they are ketoses that differ in configuration at C2 only. B. Yes, because they differ in configuration at more than one carbon. C. Yes, because they are C1 epimers. D. No, because they are enantiomers.

opposite directions.

Enantiomers each rotate plane-polarized light by the same magnitude but in

2c+2-h-x+n/2 2(8)+2-13-1/2= 2

How many degrees of unsaturation are present in a compound with molecular formula C8H13OCl?

tertiary alkyl halides

SN1 reactions are nucleophilic substitutions that occur in two steps: Formation of a carbocation and nucleophilic attack of the carbocation. Reactivity of alkyl halide substrates depends on the alkyl halides' substitution. _____ are the fastest to react because they form a stable carbocation; as substitution decreases, the alkyl halide will react more slowly because it forms a less stable carbocation

inverted.

SN2 reactions are concerted substitution reactions in which a nucleophile attacks an electrophile and the bond between the electrophile and the leaving group simultaneously breaks. The nucleophile does a backside attack, and if the electrophilic carbon is chiral, the stereochemistry of the chiral carbon is ___

Atoms of higher electronegativity more effectively stabilize negative charge and less readily donate electron density to electrophiles whereas those of lower electronegativity stabilize a negative charge less effectively and more readily donate electrons to electrophiles. soo A

Suppose that NaI was replaced with another nucleophile in Experiment 1. Which of the following anions would be the most nucleophilic? A. CH3(CH2)2CH2− B. (CH3)2N− C. CH3CH2O− D. F−

Specific rotation is the angle by which chiral molecules rotate plane-polarized light and contains direction (+ or −) and magnitude (degrees). The observed rotation αobs is dependent on the concentration (c in g/mL) and sample cell length (l in dm). Therefore, the specific rotation is standardized to account for these experimental parameters: α= αobsc×l

Suppose that a 0.2 g/mL solution of (S)-ibuprofen in a 2 dm long cell rotates plane-polarized light +10°. What is the specific rotation for (S)-ibuprofen?

A

The reaction below was performed under thermodynamic conditions to yield Compound 1 and Compound 2 as a mixture of structural isomers. If Compound 1 is more stable than Compound 2, what can be inferred about the relative amounts of Compound 1 to Compound 2 in the mixture? A. There is a greater amount of Compound 1 in the mixture. B. There is a greater amount of Compound 2 in the mixture. C. There are equal amounts of Compound 1 and Compound 2 in the mixture. D. Nothing can be inferred about the relative amounts of the compounds in the mixture.

differ in orientation at one stereocenter

Which of the following structures is an epimer of NNG3?

Class;false

___ consciousness is the recognition of class structure and identification with one's own social status. ___ consciousness refers to individuals from lower classes adopting misleading messages from the upper class.

gray matter

____ is composed of unmyelinated neuronal cell bodies and dendrites.

tertiary > secondary > primary > methyl methyl > primary > secondary > tertiary

the order of decreasing stability for these species is: Carbocation: Carbanion: