Writing Structural Formulas

You will be writing structural formulas throughout this course. Perhaps a few hints about how to do so will be helpful. Let s look at another case of isomerism. Suppose we want to write out all possible structural formulas that correspond to the molecular formula C5H12. We begin by writing all five carbons in a continuous chain. [Pg.14]

This chain uses up one valence for each of the end carbons and two valences for the carbons in the middle of the chain. Each end carbon therefore has three valences [Pg.14]

To find structural formulas for the other isomers, we must consider branched chains. For example, we can reduce the longest chain to only four carbons and connect the fifth carbon to one of the middle carbons, as in the following structural formula [Pg.15]

If we add the remaining bonds so that each carbon has a valence of 4, we see that three of the carbons have three hydrogens attached, but the other carbons have only one or two hydrogens. The molecular formula, however, is still C5H12. [Pg.15]

Suppose we keep the chain of four carbons and try to connect the fifth carbon somewhere else. Consider the following chains [Pg.15]

With practice writing structural formulas for organic molecules soon becomes rou tine and can be simplified even more For example a chain of carbon atoms can be rep resented by drawing all of the C—C bonds while omitting individual carbons The result mg structural drawings can be simplified still more by stripping away the hydrogens... [Pg.22]

Write structural formulas for al avTng the given molecular formula... [Pg.23]

Now write structural formulas for the remaining three isomers Be sure that each one IS a unique compound and not simply a different representation of one writ ten previously... [Pg.70]

In Problem 2 5 you were asked to write structural formulas for the five isomeric alkanes of molecular formula C6H14 In the next section you will see how the lUPAC rules generate a unique name for each isomer... [Pg.71]

Write structural formulas or make molecular models for the most stable conformation of each of the following compounds... [Pg.129]

Write structural formulas for each of the following bicyclic... [Pg.131]

Excluding compounds that contain methyl or ethyl groups write structural formulas for all the bicychc isomers of (a) CsHg and (b) CgHjo... [Pg.138]

Write structural formulas or build molecular models and give the... [Pg.145]

Write structural formulas or build molecular models and give the functional class and substitutive names of all the isomeric alcohols that have the molecular formula C4H10O... [Pg.145]

Two stereoisomers of 1 bromo 4 methylcyclohexane are formed when trans 4 methyl cyclohexanol reacts with hydrogen bromide Write structural formulas or make molecular mod els of... [Pg.185]

Photochemical chlorination of pentane gave a mixture of three isomenc monochlorides The pnncipal monochlonde constituted 46% of the total and the remaining 54% was approximately a 1 1 mixture of the other two isomers Write structural formulas for the three monochlonde iso mers and specify which one was formed in greatest amount (Recall that a secondary hydrogen is abstracted three times faster by a chlonne atom than a pnmary hydrogen)... [Pg.186]

Write structural formulas for all the alkenes that can be formed... [Pg.213]

Write structural formulas and give the lUPAC names for all the... [Pg.364]

Write structural formulas for toluene (CeHsCHj) and for benzoic acid (C6H5CO2H) (a) as resonance hybrids of two Kekule forms and (b) with the Robinson symbol... [Pg.427]

The mam components of a skunks scent fluid are 3 methyl 1 butanethiol and as- and trans-2 butene 1 thiol Write structural formulas for each of these compounds... [Pg.649]

Write structural formulas corresponding to the intermediates formed in the con (jugate addition step and in the aldol addition step ... [Pg.779]

The preparation of cis 4 tert butylcyclohexanol from its trans stereoisomer was earned out by the following sequence of steps Write structural formulas including stereochemistry for com pounds A and B... [Pg.880]

Ambrettohde is obtained from hibiscus and has a musk like odor Its preparation from a compound A is outlined in the table that follows Write structural formulas ignonng stereochem istry for compounds B through G in this synthesis Hint Zinc as used in step 4 converts vici nal dibromides to alkenes )... [Pg.881]

One of the following esters cannot undergo the Claisen con densation Which one Write structural formulas for the Claisen condensation products of the other two... [Pg.889]

Write structural formulas for the a and 3 methyl pyranosides formed by reaction of o galactose with methanol in the presence of hydrogen chloride... [Pg.1045]

Write structural formulas showing the constitution of each of peptides Rewrite each sequence using one letter abbreviations... [Pg.1127]

It has been observedt that poly(1,1-dimethyl propane) is the product when 3-methylbutene-l is polymerized with AICI3 in ethyl chloride at -130°C. Write structural formulas for the expected repeat units and those observed and propose an explanation. [Pg.413]

Write structural formulas for maleic anhydride (M ) and stilbene (M2). Neither of these monomers homopolymerize to any significant extent, presumably owing to steric effects. These monomers form a copolymer,... [Pg.496]

From among the 18 constitutional isomers of CgHig, write structural formulas, and give the TUPAC names for those that are named as derivatives of... [Pg.100]

Write structural formulas, or build molecular models for all the constitutionally isomeric alcohols of molecular formula C5H12O. Assign a substitutive and a functional class name to each one, and specify whether it is a primary, secondary, or tertiary alcohol. [Pg.182]

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