

1. Construct a model that has a central carbon atom with 4 different colored spheres attached...
1. Construct a model that has a central carbon atom with 4 different colored spheres attached to it, representing four different atoms or groups. Draw a solid/dashed-wedge structure of this model here and answer the following questions. ç (a blue ball) IND Fig. 1 B a. Does the model have a plane of symmetry? Yes No The central carbon is said to be a stereocenter, stereogenic center, or chiral carbon. Change one of the colored spheres so that two of...
Construct a model with four different groups(black,yellow,red, and green) attached to the central atom(black), set the substituent black atom points toward the ceiling. 1. In which direction, clockwise or counterclockwise must you proceed to list the same sequence of colors of the three atoms resting on the desk surface? 2. Make an exact model and try to superimpose the two models, how do the models differ from one another? Replace the green atom in each model with a yellow atom,...
3. Diastereomers and Meso Forms. When a molecule has two or more stereogenic centers, stereoisomers that are not mirror images can exist; these are called diastereoisomers. Within this general class, there are special types of stereoisomers that are always optically inactive and are called meso forms. Construct a model with four different colored balls about a carbon center. Construct another identical to the first and verify this by the superimposition test. Now remove the same colored balls, blue (C from...
3. Diastereomers and Meso Forms. When a molecule has two or more stereogenic centers, stereoisomers that are not mirror images can exist; these are called diastereoisomers. Within this general class, there are special types of stereoisomers that are always optically inactive and are called meso forms. Construct a model with four different colored balls about a carbon center. Construct another identical to the first and verify this by the superimposition test. Now remove the same colored balls, blue (C from...
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4. Enantiomers.- THIS FOLLOWING EXERCISES ON PAGES 6 AND 7 ARE TO BE DONE AS A GROUP WITH THE LAB INSTRUCTOR!!!! a) Construct a model consisting of a tetrahedral carbon center with four different atoms attached - use white, green, orange and violet balls. Each color represents a different group or atom attached to the central carbon. Does this model have a plane of symmetry? Note 1: a plane of symmetry can be described as a cutting...
1. Construct a model consisting of a tetrahedral carbon center with four different component atoms attached: red, white, blue, green; each color represents a different group or atom attached to carbon. Does this model have a plane of symmetry (1a)? A plane of symmetry can be described as a cutting plane-a plane that when passed through a model or object divides it into two equivalent halves; the elements on one side of the plane are the exact reflection of the...
Chiral centers Procedure: Construct a model* in which a tetrahedral (sp 3) carbon atom (black) has four different model atoms attached to it. Use the light blue ball, red, blue and, green polyhedrons to represent four different atoms or groups attached to the central atom (black). 1. Does the model have a plane of symmetry? a. Yes b. No
1-Make two identical models of methane with four different colored balls attached to each carbon. on one model switches two of the balls. drwa the two structure in steroscopic projection with dashes, wedges and label each hydrogen. 2- Are these structures identical or are they different? if they are different how are they different? what is the relationship between the two structures?
Figure 2: How many chiral carbons does this model have? a Does this model have a plane of symmetry? Rotate the central bond to see b. possible conformations before answering/ Yes No Make the mirror image model of this molecule. Are the mirror images identical? Yes No C. dl What is the term for the relationship between these structures? Are these structures chiral €or achiral? Switch two of the groups on one of the carbons of one model, resulting in...
rojection Formulas for each model in #16 (again orient the carbon chain up and down). Are the mirror images "superimposable?" Interchange any two of the groups located at one of the chiral centers on one of the models in # 1 6. What is the stereochemical relationship of the resulting structure with the one that used to be its mirror image? Will this 'new' model be "optically active?" Why or why not? 18. PART 4:2,3-DICHLOROPENTANE CH, CH(C)-CHC)-CH2CH Build a model...