http://www.merlot.org:80/merlot/ A search of MERLOT materials Copyright 1997-2013 MERLOT. All rights reserved. Wed, 22 May 2013 07:28:07 PDT Wed, 22 May 2013 07:28:07 PDT http://www.merlot.org:80/merlot/images/merlot.gif http://www.merlot.org:80/merlot/ 44 34 http://www.merlot.org/merlot/viewMaterial.htm?id=84217 3DMolSym is an educational program designed to visualize the symmetry elements of molecules and to animate the corresponding symmetry operations in an interactive 3D environment.It is aimed to help chemistry students conceive the symmetry properties of the molecular structure. 3DMolSym includes a database with symmetry and geometry data of 48 organic and inorganic molecules, corresponding to all point groups of chemical interest. http://www.merlot.org/merlot/viewMaterial.htm?id=84210 Interactive molecular visualization of molecular normal modes of vibration.3DNormalModes is a molecular visualization educational program that provides a convenient way to illustrate how a molecule vibrates and the properties of its normal modes of vibration in a real 3D environment. http://www.merlot.org/merlot/viewMaterial.htm?id=91309 VRML utility for the calculation and visualization of IR and Raman Spectra and 3D visualization of corresponding normal modes. http://www.merlot.org/merlot/viewMaterial.htm?id=84134 This site contains a Flash animation of how crude oil is distilled. The teachers resource section also has more resources on topic of fossil fuels. http://www.merlot.org/merlot/viewMaterial.htm?id=88653 A list of Shockwave simulations of basic properties and materials of organic chemistry. http://www.merlot.org/merlot/viewMaterial.htm?id=234022 This is a great tool for learning how to obtain a structure given a molecular formula and a proton nuclear magnetic resonance (1H NMR) spectrum. First, the user is required to calculate and enter double bond equivalents. Next, the user selects molecular fragments based upon what is seen in the spectrum. The user can watch as the molecular formula counts down as fragments are selected.  Any fragments not seen in the spectrum are then selected so that the molecular formula reaches 0. In the next phase, the user builds a molecule using the selected fragments (taking care to rotate methyl groups only). If the structure is incorrect, a message comes up giving the user the opportunity to try other structures. If the correct structure is chosen, the application gives a message to that effect and then closes. Thus far, there are 50 exercises. The application is a great tool for teaching students about the nuances of proton NMR. http://www.merlot.org/merlot/viewMaterial.htm?id=658504 This is an automated demonstration enabling the user to measure the optical rotatory dispersion of a mixture of optical isomersOptical activity of compounds in solution can be measured with a polarimeter, shown schematically in the upper part of the graphic. The angle of rotation of plane polarized light, conventionally the sodium D-line at 589 nm, is determined using two polarizers. (In the graphic, an idealized incident polarizer is reduced to a vertical slit coincident with the plane of polarization.) The angle of polarization of the emerging light is given by , where is the specific rotation, referred to the sodium D-line and a temperature of 20 ºC, is the path length in decimeters (set equal to 10), and is the concentration in g/ml. http://www.merlot.org/merlot/viewMaterial.htm?id=91311 The VRML File Creator for Chemical Structures is an online service for the generation of VRML scenes from your 2D or 3D data files. It supports over 40 structure file formats and contains also a Molecule editor for structure input. It automatic generates 3D coordinates if not contained in the input structure. The service allows the measurement of atom distances, bond angles and torsional angles. It has many display options to control the visual appearance.