Answer these o chem

[utdent20]

can people give their explanations as well.
1.All The following are oxidizing agents EXCEPT:
a) KMnO4 b)CrO3 C)LiAlH4 d)H2CrO4 e) OsO4

2.Which is the most basic?
C6H5NH2 b)BrCh2NH2 c)FCH2NH2 d) CH3NH2,E) ClCH2NH2

3.All of the following are characteristics of which nucleophilic reactions
One step, biomolecular second order, prefers smaller, less sterically hingered reactants,results in inversion config,nucleophile replaces leaving group
a)SN1 b)SN2 C)E1 D)E2 E) Band D

4. What are terminal functional groups?
I-aldehydes, II-ketones, III Carboxy acid IV Esters
a)III only, B)I and III, C)II and III, D) I, III, IV, E) I, II, III, Iv

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[Sea of ASH]

can people give their explanations as well.
1.All The following are oxidizing agents EXCEPT:
a) KMnO4 b)CrO3 C)LiAlH4 d)H2CrO4 e) OsO4
LiAlH4 is a reducting agent

2.Which is the most basic?
C6H5NH2 b)BrCh2NH2 c)FCH2NH2 d) CH3NH2,E) ClCH2NH2
I was stuck between b and d...

3.All of the following are characteristics of which nucleophilic reactions
One step, biomolecular second order, prefers smaller, less sterically hingered reactants,results in inversion config,nucleophile replaces leaving group
a)SN1 b)SN2 C)E1 D)E2 E) Band D
one step, bimolecular is sn2 or e2.... sn2 favors less steric hindrance

4. What are terminal functional groups?
I-aldehydes, II-ketones, III Carboxy acid IV Esters
a)III only, B)I and III, C)II and III, D) I, III, IV, E) I, II, III, Iv
aldehydes and carboxylic acids are terminal

 

[Tina324]

why isn't #2 a...it has a more substituted carbon. wouldn't that be a better electron donor that choice d? also all the other choiced have ewg's Br, Cl, etc..wouldn't that take away some of the basicity of -NH2??

 

[Kkae]

can people give their explanations as well.
1.All The following are oxidizing agents EXCEPT:
a) KMnO4 b)CrO3 C)LiAlH4 d)H2CrO4 e) OsO4
LiAlH4 is a reducting agent

2.Which is the most basic?
C6H5NH2 b)BrCh2NH2 c)FCH2NH2 d) CH3NH2,E) ClCH2NH2
I was stuck between b and d...

3.All of the following are characteristics of which nucleophilic reactions
One step, biomolecular second order, prefers smaller, less sterically hingered reactants,results in inversion config,nucleophile replaces leaving group
a)SN1 b)SN2 C)E1 D)E2 E) Band D
one step, bimolecular is sn2 or e2.... sn2 favors less steric hindrance

4. What are terminal functional groups?
I-aldehydes, II-ketones, III Carboxy acid IV Esters
a)III only, B)I and III, C)II and III, D) I, III, IV, E) I, II, III, Iv
aldehydes and carboxylic acids are terminal

Agree but confused about # 2

 

[water88]

I think number 2 would be a) because electron donating groups increase basicity.

 

[Albuterol]

i think #2 would be A also for the same reason.

 

[doc3232]

i think #2 would be A also for the same reason.

No, alkyl amines are very basic, for number 2.
aniline isn't very basic because of resonance...I am sure, I memorized the pKas of Nitrogen molecules in O-chem class....

 

[Albuterol]

oh..i did not know that. thanks man!

 

[cherr1pop]

for #4, aren't esters terminal functional groups as well? so the answer would be d?

 

[Chesnok]

1- C, LAH is the best reducing agent ever according to my OCHEM professor lol.
2- only D guys lol , ring is always pulling e's on it
3 - you know ...it's sn2
4 - B definately, esters are never terminal groups.
Good luck

 

[water88]

No, alkyl amines are very basic, for number 2.
aniline isn't very basic because of resonance...I am sure, I memorized the pKas of Nitrogen molecules in O-chem class....

Yeah, you're right. I didn't realize it was a ring the way it was written, I thought it was just an alkyl chain.

 

[utdent20]

on #4 why could it also not be E2??