Hydronge NMR

[Dencology]

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guys:
how many different picks does it show in the following molecule.
also, how many picks does carbone #3 (from left hand side) show?

1. n-hexane: CH3-CH2-CH2-CH2-CH2-CH3

2. 1,2-dichloroethane CH2-Cl-CH2-Cl

I assume we have only a triplet here for #2. because either of the CH2 has two neighboring Hydrgen next to ghem so it is n+1 which is 2+1=3 and both of them are equal so it shows only a triplet, right?

 

[klutzy1987]

1) Carbon 3 is a multiplet (quintuplet=5 peaks).

 

[klutzy1987]

2) They have a singlet and thats it, because equivalnt hydrogens do not split each other.

 

[HoangDDS]

guys:
how many different picks does it show in the following molecule.
also, how many picks does carbone #3 (from left hand side) show?

1. n-hexane: CH3-CH2-CH2-CH2-CH2-CH3

2. 1,2-dichloroethane CH2-Cl-CH2-Cl

I assume we have only a triplet here for #2. because either of the CH2 has two neighboring Hydrgen next to ghem so it is n+1 which is 2+1=3 and both of them are equal so it shows only a triplet, right?

1) 3 peaks (3 Different H groups )-- 2 triplet and one sixlet (6 peaks or watever)
ummm both terminal CH3 see the same CH2, so n+1 = 3 or triplet. The CH2 next to that is gonna see the CH2 in the middle and the terminal, which totals to 5 H, so n=5, n+1=6 peaks. the two middle CH2 will see a triplet.

2) 2 peaks (2 different H groups)-- 2 singlet. The carbon between the 2 Cl is gonna be a singlet but futher downfield due to high EN of Cl.

 

[HoangDDS]

I'm such an idoit. 6 peaks = sextet (haha sounds like a pornstar's name) and 5 peaks = quintet.

 

[Dencology]

so is the right # of picks?

1. n-hexane: CH3-CH2-CH2-CH2-CH2-CH3

carbon 1 from left shows 3
carbone 2 from " " 4 & 3
carbone 3 & 4 from left shows 3
carbone 5 from left shows 3 &4
carbone 6 shows 3

is it right?

 

[klutzy1987]

so is the right # of picks?

1. n-hexane: CH3-CH2-CH2-CH2-CH2-CH3

carbon 1 from left shows 3
carbone 2 from " " 4 & 3
carbone 3 & 4 from left shows 3
carbone 5 from left shows 3 &4
carbone 6 shows 3

is it right?

1. n-hexane: CH3-CH2-CH2-CH2-CH2-CH3

carbon 1 from left shows 2+1=3
carbone 2 from " " 5+1=6
carbone 3 & 4 from left shows 2+1=3
carbone 5 from left shows 5+1=6
carbone 6 shows 2+1=6

1 and 6 share a peak, 2 and 5 share a peak, 3 and 4 share a peak.

 

[Dencology]

i stilldon't get it how you come up with six picks for carbon 6. its neighboring carbon has two H so it would be 3. why do you have 6

also, carbon 2 has a neighboring carbon with 3 hydrogen and two hydrogen, so wouldn't is show 4 & 3?