Unknown #4 Elemental Analysis: 69.72% Carbon, 11.70%...

Unknown #4 Elemental Analysis: 69.72% Carbon, 11.70% Hydrogen, 18.57% Oxygen Mass Spec Relative Intensity 100- 80 60 40- 20- 0 10 20 30 40 50 60 70 80 m/z IR HDI Calculation: $^1$H NMR Proposed Structure: $^{13}$C NMR ppm Exchanges with $D_2O$ ppm Chemical Formula:

Transcript

00:01 Hello students welcome here in this question we have the nmr proton nmr structure is given proton nmr and c 13 nmr are given for a molecule that is containing the molecular formula c7 h16 o so here they are giving we have to explain the structure of the molecule according to these two data so if you see here in the structure degree of unsaturation first of all we had to calculate how many the bonds are present here so if you see here degree of unsaturation to see plus so here how many carbons are present to 2 multiplied by 7 plus 2 nitones are 0 minus this one also 0 and this one is 16 so 14 plus 2 16 minus 16 that is equal to 0 so there is no sides of unsaturation in the given molecule now we will see the proton enumath how they are given here from proton nmr, 3 .3 is given, protons number of what are the protons they are given.

01:44 So for two protons there is a triplet is given.

01:50 For true protons there is a triplet means it is attached to ch2 is attached to oxygen.

02:11 And here if you see the next one.

02:14 1 .3 2 protons here also.

02:18 2ndate is given so as it is attached to attach to ch2 attached to 2 ch2 now 1 .1 is given so for 8 protons it is 1 .1 so there are 4 ch2 having approximately approximately 6 ppm values merging with each other so this one is given and now 8 uh 0 .8 is given for 3 protons this one is triplet so this one is ch3 attached to ch2 group and 0 .6 this one is for one proton which is exchangeable so this one is oh proton so from this we can write the structure but we will see the proton nmr c 13 nmr also so here 62 is given so which one is ch2 attach to oxygen and now 32 aliphatic is given which is representing aliphatic ch2 now 30 is given which one is aliphatic ch2 and the same thing at 28 and 28 25 22 all are same and another one is 13 is there once so this this is alephatic ch3 group.

04:46 Okay, so now we will see.

04:48 This is a lengthy chain...

Question

Unknown #4 Elemental Analysis: 69.72% Carbon, 11.70% Hydrogen, 18.57% Oxygen Mass Spec Relative Intensity 100- 80 60 40- 20- 0 10 20 30 40 50 60 70 80 m/z IR HDI Calculation: $^1$H NMR Proposed Structure: $^{13}$C NMR ppm Exchanges with $D_2O$ ppm Chemical Formula:

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