Fischer projection introduction | Stereochemistry | Organic chemistry | Khan Academy

How to assign a configuration to a chirality center using a Fischer projection.

Organic Chemistry on Khan Academy: Carbon can form covalent bonds with itself and other elements to create a mind-boggling array of structures. In organic chemistry, we will learn about the reactions chemists use to synthesize crazy carbon based structures, as well as the analytical methods to characterize them. We will also think about how those reactions are occurring on a molecular level with reaction mechanisms. Simply put, organic chemistry is like building with molecular Legos. Let's make some beautiful organic molecules!

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[moristhetiger]

I think if we use thumb rule like we do in physics is quite useful ... assign 1 2 3 4 ... use either of your hand' s curl to corresspond to a circle from 1 2 3 and if its your Right hand' s thumb that points to the direction of 4 its R rectus otherwise its S. with this I dont have remember if clockwise is R or S to assign configurations.

[moristhetiger]

i can remember Horizontal is H or High or outward upward. Thanks for the video sir.

[aravindirasur]

Big hats of to khan's academy❤❤❤❤❤❤❤❤❤

[monikanagaraj]

thank you sir it really help to understand easily

[skeche]

how did he figure out that in the fischer projection, the H and the OH is pointing out of the page rather than in? Because if it was pointing in, then taking the opposite of S would be incorrect when it is just R since lowest priority is pointing away.
(Edit:)
Nevermind, in the next video he says all horizontal lines in the fischer projections means pointing out of page.

[sakurarieko]

We rank the molecules based on their atomic number righ???
Why is OH first ?? When the other group has oxygen in them !
Can someone make it clearer for me please

[datdudedman]

Does the take what it looks like and then label it the opposite configuration only work with Fischer projection or can we use it when labeling all chiral molecules?

[shobhit]

Is this in the American High school syllabus