This Help page is designed to provide assistance in using different media forms on the wiki, including videos, jmols, and Lewis diagrams. Jmols are an easy way to represent molecules in a three-dimensional form.
3D Structures of Molecules (Jmol)
Molecules can be searched for here.
Other help sections provide full details of how to upload files and insert Jmol graphics.
The page ChemEd DL Jmol Applets gives a very detailed description of jmols, including what tags can be used to display features.
If you have difficulty adding your own Jmol to the wiki page (one that is not in the ChemEd DL repository) for now contact Jshorb).
The Jmol provides many useful and illustrative functions for visualizing molecules. If you want to add visualization for vibrations, Molecular Orbitals, Symmetry Elements or various other representations, then insert a Jmol using the corresponding tag. Below we have a water molecule with the associated representation menu, as well as the vibrational modes menu.
Various options for inserting molecules with the various menus is done using a set of simple tags.
2-D Images of Molecules and Lewis Structures
We can insert a simple 2D picture of a molecule:
All of the above molecules can be viewed in their Lewis Structure corresponding to the Resonant structure most contributing to the overall electron configuration. An example of one is shown below.
Lastly, we can actually use MarvinSketch to view all of the various Lewis Structures which contribute to the overall structure. Here you can see a drop-down menu of the various weights of the Lewis Structure of interest, as well as the graphic of that representation.
Videos can be used to show chemical reactions, lab techniques or other chemical concepts difficult to convey in text or images. Two sources for adding videos are currently used on ChemPRIME. It is especially important to provide context to inserted videos in the text, as not everyone may be able to view video content.
ChemED DL Streaming Video
The Chemical Education Digital Library(ChemEd DL) hosts a large collection of videos which cover a broad range of chemical topics. This includes the Chemistry Comes Alive!(CCA) collection, published by the Journal of Chemical Education. The following steps show how to take advantage of the CCA library:
1) On the right side of the CCA collection page are a set of tools for searching for videos. The search function can be used to enter your query. The keyword link is also quite useful, as it has already categorized videos by topic.
2)Once you find a good video, find the information on its location. For instance, the Nitrogen Triiodide video, is found on the page http://jce.divched.org/JCESoft/CCA/CCA3/MVHTM/NITRO3I/NI3IOD.HTM
From the URL: The video is in CCA volume 3 The listed path is: MOVIES/NITRO3I The video name is: NI3IOD.MOV
This information is also found at the bottom of the page.
The unique identifier for this video is: CCA3/MOVIES/NITRO3I/NI3IOD
Sometimes, finding the unique identifier cannot be deduced from the URL. For instance, the video on http://jce.divched.org/JCESoft/CCA/CCA6/MAIN/2QuantMenu/Weighing/SPOON/SPOON1_2/MOVIE.HTM has the unique identifier:
This identifier can actually be found just to the right of the movie on the page.
3)To insert a video onto the page, simply place the unique identifier inside the <chemeddl-video></chemeddl-video> tag, as shown below:
In addition to CCA videos, new (non-CCA) videos found here use the same syntax. These videos use a video ID instead of the CCA identifier. All CCA videos also have video IDs in addition to CCA identifiers. In the future, there will be an easy search for videos and their video IDs. For now, the Textbook Table of Contents page can be used to search for videos. Upon finding a video, click on it, to take you to the video page. The Video ID appears in the URL. For instance, the Ketene generator video:
has a video ID of 3309.
4) After inserting a video, make sure that the context of the video is explained in the text, since some users may not be able to display videos on their machines.
Using YouTube Video
Another source for videos is YouTube, to which a number of chemistry related videos have been uploaded, and to which a ChemPRIME user could upload their own video of a chemical concept. YouTube videos cannot currently be inserted into ChemPRIME webpages. However, by creating a link to the video of interest, that video will be inserted into the Chempaths page automatically. The syntax for linking to a website in wiki-code is:
[website_address hyperlink text]
A good example of linking to YouTube videos can be seen on CoreChem:Titrations.
As always, make sure the content and context of the added video is explained in the text.