CS Chem3D Net Version 3.2 For Microsoft Windows 3.1, Microsoft Windows NT, and Microsoft Windows 95 © 1986-1995, CambridgeSoft Corporation Welcome to CS Chem3D Net! The CS Chem3D Net application is a demonstration version of the CS Chem3D Pro application and contains a subset of the features available in CS Chem3D Pro. It is especially designed to view three-dimensional chemical structures served over the World Wide Web at sites such as http://chemfinder.camsoft.com. CS Chem3D Net is an application used to view molecular models in the following formats: Chem3D, Alchemy, Cartesian Coordinates 1, Cartesian Coordinates 2, CCDB, Internal Coordinates, MacroModel, MSI MolFile, MOPAC, PDB, SYBYL, and SYBYL2. These are the files installed: readme.txt This file chem3d.exe CS Chem3D Net application chem3d.hlp Online help for CS Chem3D Net license.txt Important licensing information for CS Chem3D Net c3dfiltr [directory] File filters for use by CS Chem3D Viewer c3dtable [directory] Tables for use by CS Chem3D Viewer c3dtmplt [directory] Sample CS Chem3D files c3dut32.dll c3dut16.dll Dynamically linked libraries required by CS Chem3D Net =========================================================== Things you can quickly do with a Chem3D model using CS Chem3D Net: • Choose one of the Spin About Axis commands from the Movies menu to make a Chem3D movie. Click the Stop button to stop the movie. • Select the Trackball tool (the second icon in the Tools window) and perform real-time rotation of the entire molecule. • Select Model Display Settings from the View menu and change display attributes for the model. • Select the Select tool (the first icon in the Tools window) and move the pointer over atoms and bonds to display information about them. You can also display other information by clicking atoms and bonds to select them. • Hold down the mouse button while pointing to one of the four rotation bars (located around the periphery of the window containing a model) and drag along the rotation bar. You can perform real-time rotations about the X Axis, about the Y Axis, about any axis defined by two atoms, or around a bond. • Choose the commands in the Analysis menu to display bond lengths, bond angles, dihedral angles and close contacts. All of the features of CS Chem3D Net are available in CS Chem3D Pro. You can learn many of the ways that models can be manipulated in CS Chem3D Pro by working with models in CS Chem3D Net. However, CS Chem3D Net is a viewing tool only; you cannot save your work from CS Chem3D Net and you cannot create models. As long as you do not modify them in any way, you can print and copy models that you have downloaded from the WWW, or that you have been given by colleagues. CS Chem3D Pro contains many other features that you can use to manipulate and analyze models. Some of the things you can do in CS Chem3D Pro that you cannot do in CS Chem3D Net include the following: build models using drawing tools and a collection of pre-existing fragments, or by specifying fragment names; open files containing two-dimensional structures (with formats including CS ChemDraw, Connection Table, MDL MolFile, and SMDFile); save models in Chem3D format or a variety of others (including Alchemy, Cartesian Coordinates 1, Cartesian Coordinates 2, CS ChemDraw, Connection Table, Internal Coordinates, MacroModel, MDL MolFile, MSI MolFile, MOPAC, PDB, ROSDAL, SMDFile, SYBYL, and SYBYL2, as well as PostScript and Windows MetaFile); print modified models; copy pictures of modified models into other applications; manipulate the parameters used to build models; perform structural error and energy minimization; dock and overlay separate molecules; run molecular dynamics calculations; and compute steric energy. 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