Structure drawings

This tutorial, which is based on the Beilstein update BS0202PR (May, 2002) and on the retrieval program Cro.ssFire Commander V6,. shows. some typical advanced search examples in the Beilstein database. It is assumed that the user already knows some of the basic features of the retrieval program. Moreover, in this tutorial the CrossFire Structure Editor is used instead of the (SIS/Draw Structure Editor. The first example is a combined application of structure aiM fact retrieval, whereas the second example demonstrates reaction retrieval. 

How many isomers of CsHs can you write" An article in the March 1994 issue of the Journal of Chemical Educa tion (pp 222-224) claims that there are several hun dred and draws structural formulas for 25 of them... 

Some polymers are listed below by either lUPACt (I) names or acceptable trivial (T) names. Draw structural formulas for the repeat units in these polymers and propose an alternative name in the system other than the one given. 

Draw structural formulas for each of the following eompounds, elearly showing stereochemistry ... 

Draw structures for the following molecules, showing lone pairs ... 

Draw structures of alkanes that meet the following descriptions ... 

Problem 3.12 Draw structures corresponding to the following IUPAC names ... 

Reaction of HBr with 3-methylcyc)ohexene yields a mixture of four products os- and trara-l-bromo-3-methylcyclohexane and cis- and fra/75-l-bromo-2-methylcyclohexane. The analogous reaction of HBr with 3-bromocyclohexene yields tra/TS-l,2-dibromocyclohexane as the sole product. Draw structures of the possible intermediates, and then explain wThy only a single product is formed in the reaction of HBr with 3-bromocvclohexene. 

Thomson11 jW Click Organic Interactive to use a web-based palette to draw structures for alkyl halides, based on their IUPAC names. 

Draw structures of the step-growth polymers you would expect to obtain from the following reactions ... 

Draw structures to show how addition of the triamine results in strengthening the polymer. Amines are good nucleophiles and can open epoxide rings in the same way other bases can. 

Problem 22.1 Draw structures for the enol tautomers of the following compounds ... 

Draw structures for all monoenol forms of the following molecule. Which would yoi expect to be most stable Explain. 

Problem 27.2 Draw structures of glyceryl tripalmitate and glyceryl trioleate. Which would you expect to have a higher melting point ... 

Draw structural formulas for compounds containing the functional groups listed in Table 22.2. (Example 22.7 Problems 19-22) 21... 

Draw structures for all the alcohols with molecular formula C5Hi20. 

There are three compounds with the formula C6H4ClBr in which two of the hydrogen atoms of the benzene molecule have been replaced by halogen atoms. Draw structures for these compounds. 

---