Worksheet 1 Name Chem 30A Spring 2006 Dr Anderson ID Use the Organic Chemistry Now website http now brookscole com bfi4 to complete this worksheet see back of this worksheet for more info This will be graded and must be turned in at the start 10 05AM of class on Friday April 21 2006 1 Find dichlorodifluoromethane a What in the C Cl bond length b What is the C F bond length c What is the Cl C F bond angle 2 Find methyl iodide a What is the C H bond length b What is the C I bond length 3 Find cyclohexane chair a What is the distance separating the 1 3 diaxial hydrogen atoms Ha and Hb 3b Ha 3a b What is the distance separating the Hb 1 2 syn hydrogen atoms Ha and Hc Hc H HH 4 Find cyclohexane boat a What is the distance separating the eclipsed hydrogen atoms Ha and Hb 4b b What is the distance separating the 1 4 diaxial hydrogen atoms Hc and Hd Hc Hd Ha Hb H H 4a 5 Find dihydroxyacetone a What is the C O bond length b What is the C OH bond length c What is the C C bond length 6 Find cyclopropane a What is the C C bond length b What is the C C C bond angle 7 Find cyclopentane 1 a What is the C C bond length b What are the three C C C C dihedral angles 2 3 Instructions for using the Organic ChemistryNow Website Log onto http now brookscole com bfi4 using the password on the insert in your book If you bought a used book you ll need to find a classmate to work with on this project If you are unable to find a partner one user at a time can login using the following info location ucla user cda chem ucla edu password chem30a Please don t leave this username logged in so that we can share it as best as possible 1 After logging in click Course Materials Tab 2 Select Browne Foote ScienceNOW Organic Chemistry NOW 3 In the Table of Contents Select 02 Alkanes and Cycloalkanes 4 Scroll down and select under the category Molecular Models Alkane Molecules 5 In search window you can type in the name of the organic compound just as it is on the worksheet i e methyl iodide You can also narrow the list by compound class and select from the narrowed list The box on the right hand side will then show you the hits Clicking on the compound name will open a new window with a 3D structure This viewer allows you to measure bond distances angles and dihedrals torsions by clicking on the measurement of interest and then selecting the appropriate atoms You can also click on the molecule and drag to spin the molecule in space 6 After completing the worksheet take time to realize all the molecules you can explore with this viewer and all of the other cool things that are available on this website to enrich you organic chemistry learning experience Note Jos was kind enough to evaluate the above protocol and found the following 1 he didn t need to type in ucla anywhere when logging in using the username cda chem ucla edu 2 Upon clicking the login button he was taken directly to the table of contents without having to go through course materials tab All this to say your experiences may vary to some extent but the entire process should remain straitforward