Chemsketch freeware version

Download Freeware. Commercial Version: Day Trial Try the full version or buy online for commercial and government use. Download Day Trial. Resources Movie Drawing Tools.

Movie Stereochemistry Drawing Tools. Download ChemSketch Freeware Download. While releasing our freeware ChemSketch we purposefully did not alter the look of the product, so users could see the complete interface of the commercial version. As a result of this, a number of features are not functional in the freeware version a brief overview of these features is available here. If you click More Info, you will be able to get a detailed review of the additional features and capabilities of the product.

You will have to re-install both items, but please ensure the licensed and free software items are in different folders. Only buying the software will remove this prompt. If you can't find what you're looking for, ask a real person. Our highly trained sales and support staff are ready with answers. Frequently Asked Questions. The copies were for my convenience in making the figure. In normal use, you would just modify the original. In the top right copy, I changed two of the bonds to up wedges and two to down wedges.

In the lower right copy, I did something similar, but switched which bonds are up and which are down. Procedure for changing an ordinary bond to a wedge bond: To do this, choose a wedge bond tool, and then click on the desired bond. The wedge bond tools are at about 50 on the tool bar just above the ruler; see Fig 2. The solid wedge "Up Stereo Bonds" is for a bond pointing up, and the dashed wedge "Down Stereo Bonds" is for a bond pointing down. You can also use the wedge bond tools to draw new bonds.

I have named the structures in Fig 9, using the naming feature of ChemSketch. Convince yourself that these are correct. The procedure for getting the names is shown below in the section Naming structures. ChemSketch will put wedges wherever you tell it to -- even if they are physically unreasonable. For example, you could draw all four bonds around a C with up wedges -- which is not possible.

The ChemSketch naming procedure will not put an isomer designation on such an improper structure. Sometimes you want to label an "atom" a particular position on a structure with something other than an ordinary element symbol. Examples include: D for deuterium, X for a general halogen, Me for methyl. The symbols D and T, for the hydrogen isotopes, are available from the regular periodic table near its lower right.

That periodic table was introduced above near the end of the section on Heteroatoms ethanol. A more general way to insert an unusual "symbol" is the feature Edit Atom Label. This tool is on the left tool bar -- but off the screen. Click on the abc button; the cursor will now have an odd symbol starting with ab attached to it. Click on the atom you want to change or anywhere on the drawing screen. A new box opens, called Edit Label. You now have two main choices: First, you can type in the label you want, and press insert.

Or you can choose an item from the list there, and press insert. The general approach is to draw the neutral molecule first, then change the charge as needed.

We will assume you know how to draw the neutral molecule, acetic acid left in this case. Here are two ways to change the charge. The first is simpler for this case; the 2nd is more general. Both use functions on the left-hand column of buttons.

If you do not see the desired button, right-click in the column, and you will get a nice readable list of the buttons, well labeled. Method 1. Use the "decrement charge" button. If so, click on the little lit-up corner lower right , and choose the - option. The button will now be for "decrement charge". Click on it, and then click on the O of interest. That should give you the desired ion. Note that ChemSketch, by default, adjusts the number of H shown to fit. Method 2. Use the "atom chemical properties" button.

Click on it, and then click on the O atom. You will get a dialog box with much to offer. Click Ok. To name a structure you have drawn, use the "Generate name for structure" tool. You can access this from the Tools menu expand the Generate item , or from the button near the right hand end of the upper toolbar. If you want to remove a name that ChemSketch has put on the screen If naming was the most recent action, then using Undo on the Edit menu will remove it. Draw 2-butene. Name it.

ChemSketch seems to draw the E isomer which is trans , by default, and it properly names it as the E isomer. Now, put a Cl at the 2-position replacing the H.

Replacing an H with a Cl switches the ranking at this position relative to the methyl group. Name the new compound; it is now, properly, named as Z. If you want to learn how you can draw the "other" isomer, see the section above on Stereochemistry: Drawing cis-trans isomers at double bonds.

The "Name" feature will name chiral isomers using the R,S system. This was illustrated in the section Stereochemistry: Wedge bonds. The naming feature has limitations, such as only naming structures with 50 atoms or fewer. If you try to name a structure beyond its capacity, you will get an appropriate error message. This is not the place to try to explain them, but if you want to try them, they are available. There are commands for structure-to-code and code-to-structure. In the Section 3D structures, for RasMol we made use of the ability of ChemSketch to save export a file in another file format.

Many of these are file formats used by other programs that deal with chemical structures. For these File menu commands, the file type choices are available in the usual dialog box that comes up for choosing file name and type. Open vs Import? In earlier versions of ChemSketch, the Open command was for the ChemSketch file format, and Import was used for other file formats. Starting with version 10, the functions of Import are duplicated in Open.

That is, the two are now equivalent. I recommend use of the more common Open command; Import remains as a legacy command for those who remember it from early versions. Similarly, Save As and Export are now equivalent.

What about Save and Save As? Save is intended for saving a new copy of an existing file, with the same name, type, and location. Save As is intended when you want to change something. For a new file, the two commands become equivalent; that is, using Save will bring up the Save As dialog box.

This feature is available from the File menu, Save As command. A somewhat related operation is the use of ChemSketch structures in Microsoft Word. To do this, copy the desired information from the ChemSketch screen in the usual way. Antialiasing makes lines and edges appear smoother on the screen.

Information on how to turn on this feature was introduced in the section Getting and installing ChemSketch ; scroll down to Settings , at the end of that section. The smoothing is applied as part of displaying the structure; it is not stored in the file. Thus, one can gain the benefit of antialiasing with pre-existing files, and can turn it on or off as desired.

Since antialiasing is a display feature, not intrinsic to the drawing, it may or may not be included when you copy a structure to another application. A true screen capture will include the smoothing. On the other hand, copying the structure and pasting it into Word or Powerpoint with Paste Special does not include the smoothing. The free program IrfanView contains a good screen capture feature. Since antialiasing improves the quality of the screen display, one might just turn it on and leave it on.

It is a "resource hog"; if it slows down your system too much, you can turn it off. If you know of other exceptions, please let me know. Antialiasing was new in version My thanks to Matt Koutroulis Rio Hondo College, Whittier, California for calling my attention to this and urging me to include it here. ChemSketch is described as running under all versions of Windows, from Windows onwards. If you want to try running it under an older version of Windows, you can try.

It may or may not work. You may want to get an older version of ChemSketch. I think there was an earlier version of ChemSketch that ran "native" under Linux.

For the most part, the basics -- and the features discussed on this page -- have remained about the same during my experience with ChemSketch. The following comments indicate a few changes, which may be of interest to those using an older version. The free version of ChemSketch is related to a commercial product from the same company. As a result, the version numbers for the free program do not, alone, make much sense.

In my experience, the versions of free ChemSketch have been: 4, 5, 8, 10, 11, 12, Added in v 5: the ability to name simple organic molecules. See the section Naming structures. Added in v ability to export structures to PDF files.

See the section Import and export file types. Added in v antialiasing, for smoother appearance of lines on screen. See the section Antialiasing. Contact information Site home page. March 19, A new version, called 1. I am updating this page for the new version.

For the most part, you will probably find little difference between this and previous versions of ChemSketch, for basic functions. Introduction B. Getting and installing ChemSketch C. Drawing your first molecule D. Drawing in ChemSketch -- more basic features 1.