Jump to content

Recommended Posts

Posted

From Wikipedia :

Prototropy is the most common form of tautomerism and refers to the relocation of a hydrogen atom.

1214568102_tautomericdoubleprototropy.PNG.7d438c79ceda460d4caab4e1242701e1.PNG

on these Images you san see the four(4) tautomeric forms of a <TRIPLE-Base> !!!...

 

FIRST !!!... IF you look only at ONE "Base" !!!...

You can see the inside Hydrogens to move (Left/Right)

from the one Nitrogen-atom to the near Nitrogen-atom !!!... of the same "Base" !!!...

and that ist "Prototropy" !!!...

 

SECOND !!!... IF you look now to the three(3) "Bases" !!!...

Between two(2) Bases !!!... You have two(2) Hydrogens !!!... which can move !!!...

BUT now !!!... they don't need to move (Left/Right) !!!...

But they can move (up/down) from the one Base to the other ... the one Hydrogen !!!...

and the opposite direction the other Hydrogen !!!... of the second Base !!!...

and that is "Double-Prototropy" !!!...

 

The Hydrogens which moves !!!...

have to chance places form a "simple-Bond" to a "Hydrogen-Bond" !!!...

 

 

Posted (edited)
9 hours ago, Koni said:

From Wikipedia :

Prototropy is the most common form of tautomerism and refers to the relocation of a hydrogen atom.

1214568102_tautomericdoubleprototropy.PNG.7d438c79ceda460d4caab4e1242701e1.PNG

on these Images you san see the four(4) tautomeric forms of a <TRIPLE-Base> !!!...

 

FIRST !!!... IF you look only at ONE "Base" !!!...

You can see the inside Hydrogens to move (Left/Right)

from the one Nitrogen-atom to the near Nitrogen-atom !!!... of the same "Base" !!!...

and that ist "Prototropy" !!!...

 

SECOND !!!... IF you look now to the three(3) "Bases" !!!...

Between two(2) Bases !!!... You have two(2) Hydrogens !!!... which can move !!!...

BUT now !!!... they don't need to move (Left/Right) !!!...

But they can move (up/down) from the one Base to the other ... the one Hydrogen !!!...

and the opposite direction the other Hydrogen !!!... of the second Base !!!...

and that is "Double-Prototropy" !!!...

 

The Hydrogens which moves !!!...

have to chance places form a "simple-Bond" to a "Hydrogen-Bond" !!!...

 

 

I may be being a bit thick, but I don't understand these diagrams. Space-filling models are fairly useless at showing bonding and they don't seem to relate to the stick models beneath. Leaving them aside, what is meant by the red and yellow dots in the centres of the hexagons? And how can one tell which atoms are nitrogen?  

Edited by exchemist

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.