in the current Marvin version we do not support to draw multi step reactions, and since the Retroshyntetic arrow is a reaction arrow not a graphical one you can not do that currently.
This was the bad news, the good news is that we are working on to add various graphical arrows to marvin to at least support the drawing of multi step reactions, without complex computations. The Retrosynthetic arrows is one of the developing arrow types, so in 5.10 you will be able to draw such reaction schemes.
I hope this can be suitable for you, this is the closest point that we can currently promise.
5.10 is being released in June according to our current schedule.
And at the end there were these sentences of Akos:
"Now I'm seriously considering your suggestion.
Since this topic opened there was no any objection here, so this might
mean that not too many users use resonance arrows in reactions... on the
other hand, I need more feedback to be sure, so I will ask some users
who frequently use reactions about their opinion.
In the second attached image there are the two (!) menus having arrow options. There is no need to have two menus. The arrows should have their own menu and only one.
In the next post, I will attach an optimized suggestion how to manage the arrow menues. It's important for the usage of Marvin in education to have a consistent and intuitive GUI.
Best Regards, Hans-Ulrich
The attached image of arrow menus has been deleted. April 23, 2012, HUW.
Thank you for your suggestion, we will consider it as a
possible solution of organizing the arrows, however, I think we should keep the
original retrosynthetic arrow for the users who got familiar with it.
Oh. Sorry I meant resonance arrow. And I can see your point that: Resonance Arrows and Reaction Arrows are different things, however, I also have to consider the other users' needs who have been using resonance arrow from years. All I can imagine now to separate the resonance arrow from the reaction arrows.
Hi Efi, I cannot agree, but let's make a compromise:
I have attached an arrow menu version 8 and I think, two points are important.
1) Now the "Two-headed Arrow" in the upper "Reaction Arrows" menu part has nothing to do with resonance. This "Reaction Arrows" type produces real reactions, just as shown in a post before in the "Naphthalin-Resonance-Crash" image. So the word "Resonance" is not acceptable in the upper "Reaction Arrows" menu part.
2) The original theme of this topic concerned the same problem. There was no possibility to construct a multi step retrosynthesis reaction scheme. And the same problem is for pi-systems having many resonance formulas, e.g. the heptamethincyanin cation N\C=C\C=C\C=C\C=[NH2+]. Here there are at least 6 resonance formulas.
The Resonance Arrow has to be only in the Graphical Arrows menu section.
We need to have a correct MarvinSketch version for education in our chemistry campus. And we need it as fast as possible. Please manage the arrows toolbar just as in the attached version 8.
I have also added the "curved - dashed - crossed arrow" options you mentioned in the posts before. I think these should also be in this menu.
Best regards, Hans-Ulrich
Attached menu version 8 image has been deleted. April 23, 2012, HUW.
Last edited by Hans-Ulrich on Mon Apr 23, 2012 8:48 am; edited 1 time in total
Unfortunately, we are not ready with the new arrows yet. Besides that,
considering your suggestions and other user needs, we decided to
separate the original resonance arrow from the reaction arrows group. It
means the users will be able to add and delete it by customization. To
do this a major rewriting of this part of the code is needed.
The task "Strange behaviour of pdf and color: monochrome ?" is a
different issue, this bug could be fixed easily. There will be an 5.9.3 release due to other reasons, it was reasonable to add
this bugfix too. If we have a stable test version including the arrows, I
can send it to you.
And I think, this is only adding these two graphical arrow types more. I think it could be done soon.
3) The renaming of the already present <-> arrow types, as shown in the attached version 9, is a correction of the notation of this menu. These wrong notations are not a hindrance and we could alert the students about it.
As already asked in an other topic of me: May I have a look in the MarvinSketch code, as a long time JAVA programmer
Best regards, Hans-Ulrich
PS: I will delete my menu images in the earlier posts in this topic.
The arrow type in the mrv-file <reaction><arrow type="RESONANCE" is not to be seen by GUI users and so we can use MarvinSketch for student courses without problems. And users of the command line Marvin programs still have their familiar procedures they are using long time.
And now we are looking for the two new Graphical Arrow types
1) Graphical retrosynthetic arrow
2) Graphical equilibrium arrow
Best regards, Hans-Ulrich
Eufrozina ChemAxon personnel
Joined: 13 Dec 2010
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