Könnte mir jemand erklären was man in der Formel oben rechts nicht sieht, was noch in der untersten Formel an Detail dazukommt? Braucht man die untere Formel?
Kann mir jemand am Beispiel von Alpha-Glukose und Galaktose (wie in der Abbildung aus meinem Buch) erklären, ob und warum die Formel (Darstellung in der Abbildung) oben rechts für Alpha-Glukose NICHT ausreicht um sicherzustellen, dass es nicht vielleicht um Galaktose handeln könnte? Wieso braucht man die unterste Darstellungsweise um sicher sein zu können, dass es sich um Alpha-Glukose handelt?
Denn: Man sieht doch in der Formel oben rechts schon genau exakt welche H- und OH-Atome nach oben zeigen und welche nach unten, oder nicht?
Somit kann man doch sicher schon sagen, dass es sich um Alpha-Glukose handeln muss oder nicht?
Wozu braucht man dann also noch die untere Formel?
Und generell noch eine Frage: Wie heißen die verschiedenen die 3 verschiedenen Formeln die da gezeigt werden und wann wendet man welche davon an?
Wäre dankbar wenn mir das alles mal jemand erklären könnte
LG
(2 votes)
Loading...
From the drawing at the top right you can see that it is alpha-glucose. Something else is not said in the text.
The drawing below shows THE STABILSTE spatial arrangement, namely the (of the two possible) armchair conformations, in which all voluminous attachments are equatorial. That could have been highlighted more clearly.
I thought during the conformation is the only difference that you can see in contrast to the configuration spins around single binding.
But if you can already see which OH groups, H atoms in which direction in the configuration, then you can see rotations about single bond, but apparently? Because spins affect where the OH groups and H atoms show?
Somehow, it seems to me that in the drawing for the confirmation one simply sees the spatial arrangement of the ring and no more and no less.
I don’t understand what this has to do with rotations for easy binding, which can already be seen in the above drawing for the configuration?
But apparently you see the turns Ur in the conformation??
You can turn the thumb of your left hand up, down, front or back. The other fingers, too. But by no rotation, the left hand becomes a right hand.
For instance, you must imagine the difference between configuration and conformation.
I can’t explain it better. If this explanation does not help you (some other questions) you should create a molecular building kit. Spatial ideas must be practiced and despite practice, I regularly advise on my limits on sugar issues.
no, the explanation in the box is short, short and Right.
At the top left you can only see the sequence of atoms, at the top right, which is above and below the plane of the ring, but only with the conformation, you can also see the ring: armchair or tub or (not possible here) planar.
m.f.G.
present