Model kit

Starting the program opens a large SpartanBuild window (blank initially) a model kit and a tool bar Models are as sembled in the window Restart SpartanBuild to continue... 

You start building propanal using an sp C from the model kit Note that five dif ferent types of carbon are available Each is defined by a particular number of unfilled valences (these are used to make bonds) and a particular idealized geometry Valences that are not used for bonds are automatically turned into hydrogen atoms so it is nor mally unnecessary to build hydrogens into a model... 

Click on sp C in the model kit then click in the SpartanBuild window... 

This makes this group appear in the model kit... 

This removes the existing model from the SpartanBuild window This indicates that a ring is to be selected This makes this ring appear in the model kit... 

Select atom from model kit then double click on atom in model Valences on the new atom must match bonds in the model or replacement will not occur... 

NEW Spartan Model Electronic Modeling Kit, A set of easy-to-use builders allow for the construction and 3-D manipulation of molecules of any size or complexity— from a hydrogen atom to DNA and everything in between. This kit includes the SpartanModel software on CD-ROM, an extensive molecular database, 3-D glasses, and a Tutorial and Users Guide that includes a wealth of activities to help you get the most out of your course. (0-495-01793-0)... 

However, a few moments of reflection (or access to a molecular model kit) should convince you that these are in fact equivalent to structures written previously. In particular, the first one, like isomer I, has a five-carbon chain in which no carbon atom is attached to more than two other carbons. The second structure, like II, has a four-carbon chain with one carbon atom bonded to three other carbons. Structures I, II, and III represent the three possible isomers of CsH12 there are no others. 

A second product is the ICE Solid-State Model Kit, developed by L. A. Mayer and G. C. Lisensky, which makes it possible to build extended three-dimensional structures Using a base with holes, templates for some 60 different structures, rods, and four sizes of spheres in radius ratios, common crystal structures can be assembled in a matter of minutes (3). Furthermore, many structures can be assembled from different perspectives by teams of students For example, the cubic NaCl unit cell can be assembled with its orientation on the face of the cube or on the body diagonal. Natural cleavage planes can be found with the kit Lifting one sphere will separate atomic planes from one another. (Contact ICE for ordering information.)... 

Brian Johnson and Margret Geselbracht are thanked for critically reading this manuscript. On behalf of the Ad Hoc Committee for Solid-State Instructional Materials, it is a pleasure to acknowledge the National Science Foundation (Grant USE—9150484), the Camille and Henry Dreyfus Foundation, the American Chemical Society, the Dow Chemical Company Foundation (Solid-State Model Kit), the University of Wisconsin—Madison Outreach Program (Solid-State Model Kit), and the Institute for Chemical Education for their generous support of this project. 

Build a model for each of the following compounds. Use a molecular model kit or a chemical modelling computer program. 

Molecular model kits are a good representation of real atomic geometry. Are you able to make a quadruple bond between two atoms with your model kit What does this tell you about real carbon bonding ... 

Use a molecular model kit to build an example of a DNA nucleotide monomer. Join your nucleotide to your classmates nucleotides... 

If they are available, use inflated balloons or molecule modeling kits to construct each of the arrangements in Figure 4.11. How do these models compare with your bubble models ... 

With these five typical bond lengths, and the typical bond angles for tetrahedral, trigonal, and linear arrays, it becomes possible to construct molecular models to predict a molecule s size and shape. This may be achieved via a molecular model kit, or by computer graphics. 

Many different molecular model kits have been produced over the years, each varying in their approach to atoms and bonds, and also in their cost. However, there are three main types, which can provide us with three main types of information. These are the framework, ball-and-stick, and space-filling versions (Figure 2.30). 

Space-filling model kits are even less user friendly. They employ specially shaped atomic pieces that clip together, each representing the volume taken up by the atom and its bonding electrons. This system produces a rather more globular model that indicates the whole bulk of the molecule, including the electron clouds that are involved in bonding. The value of this type of model is that it shows just how big the molecule really is, and... 

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