The Rectangle Selection tool allows you to select multiple atoms, bonds, etc., by clicking within the workspace and dragging a rectangular selection area to your desired size. The following table lists and gives the name of each tool along with a brief discussion of its function. A zoomed-in view of the toolbar is shown here: Your browser does not support HTML5 video.ĭrawing Toolbar: The drawing toolbar on the left side of the MDM contains eight tool options. Here is a video introduction of the Formatting Toolbar: Results can include ensuring that all bonds are of equal length and that bond angles are reasonable. The Clean tool organizes the objects drawn in the workspace. In the Zoom dropdown menu, the three options from left to right are: zoom-in, zoom-out, and zoom-all. Clicking the lower-right corner of the icon opens a dropdown menu that gives three options. The Zoom tool allows you to zoom in or out within the workspace window. This tool can also be accessed via the hotkey: CTRL+Y
Therefore, the Redo function is only available after the Undo tool has been used. The Redo tool reverses an Undo command, bringing back whatever change had been cleared by Undo. This tool can also be accessed via the hotkey: CTRL+Z The Undo tool erases the last change that occurred in the workspace window. This tool can also be accessed via the hotkey: CTRL+DEL The Clear tool is used to return the workspace window to its original state. The table below gives the name and general function of each of the five tools in the formatting toolbar. (Note: Only the four-tool option is shown in the previous MDM views up above.) A zoomed-in view of the formatting toolbar’s five-tool version is shown here: 2D Molecule Drawing Module – Toolbar Introductionįormatting Toolbar: The formatting toolbar on the top left of the MDM contains four or five tool options depending on the state of the workspace window. Your browser does not support HTML5 video. Here is a video introduction to the 2D Molecular Drawing Module: The toolbar areas are highlighted in the figure below as follows: formatting tools (red), drawing tools (blue), and elemental symbols (green). There are three primary toolbar areas within the MDM border. Depending on the nature of the question being asked, the prompts can vary widely. The figure below provides an example of what the MDM may look like when a prompt is shown. Students may also see the MDM shown with a chemical drawing prompt, such as an atom, molecule, chemical reaction, or chemical scheme. The figure above presents the MDM with a “blank” module workspace (the white area). The figure below shows the entire MDM, which consists of a white workspace surrounded by a dark-gray border that contains several toolbars. The figure below shows the top portion of the MDM window, and the bottom can be accessed by scrolling down the page. Depending on your screen resolution or your browser settings, you may need to adjust the zoom in order to see the entire MDM. An example of an MDM problem is shown below. Doesn't exactly prove the bulkiness, but one gets the idea.The 2D Molecule Drawing Module (MDM) allows students to draw chemical structures or reactions as answers to Smartwork questions. I actually had some trouble using ChemDoodle to draw the molecule without any overlapping bits because of that. Since the steric barrier can be overcome with sufficient energy, such compounds usually racemize over time (though when the groups themselves are as bulky as a phenyl, this doesn't happen at any appreciable timescale, IIRC).ġ. These two configurations of the compound are stereoisomers. On the other hand, if we twisted the molecule so that the angle is again a right angle on the other side, there is now an anticlockwise step from the closer nitro to the farther nitro. This happens regardless of which side of the axis (left/right) you look at it from. You'll notice that for this particular molecule, the nitro group farther from your eyes is a clockwise step from the closer nitro group.
These groups are bulky enough to prevent that from happening 1 unless sufficient energy is provided. Note that for the right angle to "flip" over to the other side, the $\ce$ would have to pass. Instead, they have an approximate right angle between them: Due to steric factors, the rings cannot be planar.
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