User 870ab5b546
25-10-2014 14:49:03
A student sent me this message last night. I may have seen the same thing on another student's computer as well. Any insights?
I recently installed the new OS X Yosemite operating system on my macbook pro and ran into some difficulties while doing the homework that was due this Friday. The Java applet ran and opened perfectly but the applet could not select the electron pairs for moving and creating new bonds. The atoms of the molecules highlighted just fine but the electron pairs didn't. I looked up a lot of forums about this new operating system and java and I installed the current most up to date java for the OSX and I still had no luck. I also cleared the cache and tried multiple compatible browsers that functioned perfectly for OSX Maverick and had no luck. I thought about going back to Maverick but the only way i can go back apparently from reading the forums is to erase your whole computer and back it up with a time capsule (which I don't have). I was wondering if you knew a quick fix to the issue or what could be causing it or in your friends in Hungary might know something about the problem. If you could get back to me I would greatly appreciate it. So sorry for sending you this email so late.
User 870ab5b546
28-10-2014 00:56:30
I've just seen a student demonstrate for me how she can't start a 1-electron arrow at a radical electron by clicking on the electron in Marvin 14.10.8.0 in Safari on a Mac. She can start it at the atom that bears an unshared electron, and then the arrow pulls over to start at the lone electron when she releases. This is a fairly new behavior, and I can't reproduce it on my own Mac, but I think the student I referenced above had a similar problem.
ChemAxon 7936325a45
28-10-2014 12:11:49
Dear Bob,
We could not reproduce this issue. Can you send us an mrv file containing the state when the electronflow arrow can't be drawn?
Thanks,
István
User 870ab5b546
29-10-2014 15:05:48
The student is using Version 8.0 (10600.1.25) of Safari on OS X Yosemite 10.10 with Java 7 update 71. With View Lone Pairs turned on, and with either the two- or one-electron arrow tool, hovering over either the unshared electron on O or one of its lone pairs has no effect. Hovering over the O atom works, and if he draws an electron-flow arrow starting at the O atom, when he releases the cursor, the start of the arrow snaps to one of the electrons around the O. (Interestingly, the one-electron arrow starts at an electron of a lone pair, not at the unshared electron.) He says this behavior began when he updated to Yosemite. The behavior is reproducible on his machine. It's not a big deal, because the MRV representation of the electron-flow arrow doesn't change. But I thought you should know about it, because you went to the trouble of requiring students to draw their electron-flow arrows starting at electrons instead of atom symbols, and Marvin is now reverting to the original behavior.
<?xml version="1.0" ?>
<cml>
<MDocument>
<MEFlow id="o1" arcAngle="-199.95659599409996" headSkip="0.25"
headFlags="2" headLength="0.5" headWidth="0.4" tailSkip="0.15">
<MAtomSetPoint atomRefs="m1.a1 m1.a2" />
<MAtomSetPoint atomRefs="m1.a1" />
</MEFlow>
<MEFlow id="o2" arcAngle="150.0" headSkip="0.15" headFlags="2"
headLength="0.5" headWidth="0.4" tailSkip="0.15">
<MAtomSetPoint atomRefs="m1.a1 m1.a2" />
<MAtomSetPoint atomRefs="m1.a2 m1.a4" weights="0.5 0.5" />
</MEFlow>
<MChemicalStruct>
<molecule molID="m1">
<atomArray
atomID="a1 a2 a3 a4"
elementType="Br H O O"
radical="0 0 monovalent monovalent"
x2="-40.83514536213306 -39.29612656593323 -42.95774984359741 -41.41774984359741"
y2="0.12928481586034582 0.18424975872039795 -2.84487521648407 -2.84487521648407"
/>
<bondArray>
<bond atomRefs2="a1 a2" order="1" />
<bond atomRefs2="a3 a4" order="1" />
</bondArray>
</molecule>
</MChemicalStruct>
</MDocument>
</cml>
ChemAxon 7936325a45
29-10-2014 15:39:35
Dear Bob,
I opened the file and I tried to draw electronflow arrows. I could draw the arrows from a specific electron but not easily. The hit detection of the electrons is definitely wrong, the electrons where not marked when the cursor was hovering exactly over the electron, I had to find a position near the electron to mark it, so I've created a ticket in our issue tracking system.
Regards,
István