fixed angles when drawing bonds

Hello,

In versions of MarvinSketch before the most recent ones, when I drew a new bond from an existing atom by click-holding and dragging, then, as I moved the mouse around, Marvin would place the bond at certain fixed angles, but not in between those angles. This feature helped me draw pretty structures, for example, a 2D chair cyclohexane. In the latest version of MarvinSketch, though, it appears to have abandoned fixed angles, and I can set the new bond at any angle.

ChemDraw has an option to turn fixed angles on or off. Is there now such an option in MarvinSketch? I looked around for it, but I couldn't find it. If not, I would like to request that feature fairly urgently. Both fixed and unfixed angles are very useful in different circumstances.

BTW, there's a workaround for setting bonds at unfixed angles when only fixed angles are available (draw the bond to the new atom, then move the new atom in a separate step), but there's no workaround for setting bonds at fixed angles when only unfixed angles are available, so the new feature is actually a step backward without the option to turn it off.

Thanks,

Bob

Hello Bob!

Thank you for your feedback! Marvin still has fixed angles, but we have decreased that value from 15 degree to 3 degree as per requests. 

Krisztian

So, I urgently request an option to toggle between 3° and 15°. The 15° angles greatly aid in making nice artwork. Just try drawing a chair cyclohexane with the new 3° option.

Dear Bob!

Please check Insert >>> Template >>> Conformers. Here you can find the conformers you are looking for. 

Krisztian

The conformers in your templates library are 3D structures. I was referring to a 2D projection of a chair cyclohexane, such as this one (drawn in Marvin 15.8.10):

<?xml version="1.0" encoding="MacRoman"?>

<cml xmlns="http://www.chemaxon.com" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.chemaxon.com/marvin/schema/mrvSchema_14_12_01.xsd" version="ChemAxon file format v14.12.01, generated by v15.8.10.0">

<MDocument>

  <MChemicalStruct>

    <molecule molID="m1">

      <atomArray atomID="a1 a2 a3 a4 a5 a6" elementType="C C C C C C" x2="-16.55555534362793 -17.32555534362793 -15.068029571142764 -13.580503798657599 -14.350503798657599 -15.838029571142764" y2="7.888888835906982 6.555209714078947 7.490307506449101 7.888888835906982 6.555209714078947 6.953791043536828"/>

      <bondArray>

        <bond id="b1" atomRefs2="a1 a2" order="1"/>

        <bond id="b2" atomRefs2="a1 a3" order="1"/>

        <bond id="b3" atomRefs2="a3 a4" order="1"/>

        <bond id="b4" atomRefs2="a4 a5" order="1"/>

        <bond id="b5" atomRefs2="a2 a6" order="1"/>

        <bond id="b6" atomRefs2="a6 a5" order="1"/>

      </bondArray>

    </molecule>

  </MChemicalStruct>

</MDocument>

</cml>

Anyway, even if you made such a template, it wouldn't change the need for a 15° fixed angles option so that users can draw other structures in an attractive way. Cambridgesoft can program such an option, so I am confident in your ability to do so as well.

"Anyway, even if you made such a template, it wouldn't change the need for a 15� fixed angles option so that users can draw other structures in an attractive way. Cambridgesoft can program such an option, so I am confident in your ability to do so as well."

We are considering different solutions for this, and will let you know. Would you be happy with the following one? Use as it is by default, while pressing down command or shift or while rotating ..... would change the angle to 15 degree. Thanks, for the feedback, as always, much appreciated!

kniesz wrote:

Use as it is by default, while pressing down command or shift or while rotating ..... would change the angle to 15 degree. Thanks, for the feedback, as always, much appreciated!

I think that solution would work well. It would still be great to have an option to toggle the default fixed angle, but as long as I have a way of getting to 15° angles, I'll be happy.

You're welcome! As always, thanks for making a great product.

I would also like a return to fixed bond angles of 15 degrees, or at least an option to do so. I find this software really difficult to use now.

Thank you for you feedback. We really appreciate it.

A ticket has been created in our backlog and we will get back to you when this is released, but unfortunately we can not promise a quick development.

Best regards,

Nikolett Mihala

I love what you did with reaction arrows!

Reaction arrows snap every 7.5 degree.
Dragging and Pressing 'Shift' enables the free rotation of reaction arrows.

How about doing the same with bonds??

thank you for your feedback. we consider your suggestion.

Is there any progress?

The 3^o is really annoying :/

Unfortunately, we could not improve this yet.

Best regards,

Efi

paweltokarz.chem _at_ gmail.com wrote:

Is there any progress? The 3o is really annoying :/

I agree! The 3° option is terribly annoying. I've reverted to MarvinSketch 15.4.27 because of this "feature" and also the MS PowerPoint paste problem, which AFAIK has still not been fixed, either.

We do our best, but unfortunately our capacity is limited. I have commented to the other post it seems Power Point fixed the issue.

Best regards,

Efi