1 / 8

Let ’s dive in “ isomer ”

Let ’s dive in “ isomer ”. A discovery lesson , part II 29 July 2011. Checking homework – BINGO refreshing of basic concepts. Atom Compound Element Formula Molecule Property set Structure Substance. Same formula – different molecules : the germ of the isomer idea.

affrica
Télécharger la présentation

Let ’s dive in “ isomer ”

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Let’s dive in“isomer” A discoverylesson, part II 29 July 2011

  2. Checkinghomework – BINGO refreshingofbasicconcepts • Atom • Compound • Element • Formula • Molecule • Property set • Structure • Substance

  3. Same formula – differentmolecules: the germof the isomer idea

  4. ACTIVITY 2 1. Connect FOUR carbonatoms and TEN hydrogenatomstogive a molecular formula C4H10 • Eachcarbonatom (C) mustbebondedto 4 atoms • Eachhydrogenatom (H) mustbesingle-bonded Build up asmany DIFFERENT STRUCTURES aspossible. WARNING: don’t show yourmasterpiecesto the othergroups! 2. Describeonestructure at a time, withonlyallowedterms, withoutshowingitto the others. 3. Collect the moleculesthatcorrespondedto the samedescription

  5. ACTIVITY 2 (cont.)

  6. Metacognition • Anydoubts? • Trytoconnectwhatwehavefoundto reality • Whylinear, L, C, Z shapesresultinerchangeablewhile the T structureisstrikingdifferent? • Maybeweneed some furtherassumptionaboutwhatatoms in moleculs can or cannot do? • Whythereisonly a single propane C3H8? • Whyitwasimpossibletoeverybodytomake a ringstructure? Tryagain…somethinghastobeleftout…rememberthisstructure: “cyclobutane”.

  7. Follow up • Whatdoesmeanthatbutane “hasanisomer”? • Whatdoesmeanthatpropane “is a single isomersubstance”? some clues: only son/daughter, brother(s) • Whycyclobutaneisnotanisomerof the twobutanes? Write down what “isomer” means in yourownwords and then compare and discussdifferenceswithyourneighbour.

  8. Homeworks • how many hydrogen atoms would be necessary for the pentane-C5 hydrocarbons, for structures without rings? • How many isomeric structures could be made with that formula?

More Related