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Molecules Anaglyphs
A. Willm
online 3D animations
Fundamental Chemistry
Upper Secondary School
Please describe the teaching resources considered.
• Prerequisites: molecular structure, empirical, semi structural and structural formula of organic molecules.
• Contents: simple molecular structures, hydrocarbons, alcohol, aldehydes, ketones, carboxylic acids, esters.
• Aims: establish a link between the molecular structure and the nomenclature rule, between the family of the organic compound and its structural peculiarity. To acquaint oneself with the different types of molecular structure representations: 3D structure, structural formula, semi structural formula, empirical formula.
• Tasks description (to be tested):
Task 1. With the help of the animation and 3D glasses, represent the molecular structure of an alkane, an alkene, an alcohol, an aldehyde, a ketone, a carboxylic acid and an ester according to the structural, semi structural and empirical formula. Identify the group of atoms that characterizes each type of molecule.
Task 2. Establish a link between the molecular structure and the name given to the molecule.
• How to use it in class:
The students work in pair at a computer with an internet connection, a screen capture software and a word processor. They are assigned the above-mentioned task with an allotted time of 1h30.
Sequence of actions:
- To acquaint oneself with the animation (15 minutes should be more than enough);
Task 1:
- Each pair creates an A3 poster displaying a two-dimensional table: organic compounds families and molecular structure.
- The teacher prepares the same table for sharing. Students go and complete it according to the speed of each pair.
- The table is shared in order to reveal the group of atoms that is specific to each molecule family and to remind and correct atomic structures.
Task 2.
- Each pair observes the correspondence between the name and the molecular for each family and submits a rule.
- Students go and progressively complete the table.
- The table is shared.
Transfer exercises.

Veuillez décrire les ressources d’enseignement prises en considération.
• Prérequis : structure moléculaire, formule brute, semi-développée, développée plane des molécules organique.
• Contenus : structures moléculaires simples, des hydrocarbures, alcool, aldéhydes, cétones, acides carboxyliques, esters.
• Objectifs : établir un lien entre la structure moléculaire et la règle de nomenclature, entre la famille de composé organique et sa particularité structurelle. Se familiariser avec les différents types de représentation des structures moléculaires : structure 3D, formule développée plane, formule semi-développée, formule brute.
• Description des tâches (à tester) :
Tâche 1. À l’aide de l’animation et de lunettes 3D, représenter la structure moléculaire d’un alcane, un alcène, un alcool, un aldéhyde, une cétone, un acide carboxylique et un ester selon la formule développée plane, semi-développée et brute. Identifier le groupement d’atomes qui caractérise chaque type de molécule.
Tâche 2. Établir un lien entre la structure moléculaire et le nom donné à la molécule.
• Comment l’utiliser en classe :
les élèves travaillent en binôme sur un ordinateur avec connexion internet, un logiciel de capture d’écran et d’un traitement de texte. Ils reçoivent les tâches citées ci-dessus et disposent de 1h30.
Déroulement :
- se familiariser avec l’animation (15 minutes suffisent largement) ;
Tâche 1 :
- chaque binôme réalise une affiche A3 présentant un tableau à deux dimensions : familles de composés organiques et structure moléculaire.
- Le professeur prépare le même tableau pour la mise en commun. Il envoie les élèves le compléter en fonction de la vitesse de chaque binôme.
- Une mise en commun est réalisée afin de faire apparaître le groupement d’atome spécifique à chaque famille de molécules et afin de rappeler et corriger les structures atomiques.
Tâche 2.
- chaque binôme observe la correspondance entre le nom et la structure moléculaire pour chaque famille et propose une règle.
- Les professeurs envoient les élèves compléter le tableau au fur et à mesure.
- une mise en commun est réalisée.
Exercices de transfert.
Please provide information about:
• Points of strength: easy to use, with no need to download software, no compatibility problems, easy and efficient simulation. The 3D display, the set of structures
• Points of weakness: no branched alkanes with a group position number, no contextualisation or link with substances property or use.
• Scientific reliability : OK
• Pedagogic value: quite good?
Veuillez fournir des informations sur :
• les points forts : facilité d’utilisation sans téléchargement de logiciel, sans problème de compatibilité, simulation simple et efficace. La représentation 3D, le choix des structures
• les points faibles : absence d’alcane ramifé avec un numéro de position de groupement, absence de contextualisation ou de lien avec les propriétés ou usage des substances.
• la rigueur scientifique : OK
• la valeur pédagogique : assez bonne ?
Haute École Léonard De Vinci, ENCBW –LLN (BE)

Comments about this Publication

Your comments are welcome

Date: 2013.07.16

Posted by Mónica S. N. Oliveira (Portugal)

Message: The link posted is part of a larger resource collection that can be accessed via set-up by teacher Adrien Willm. The page includes a number of interesting interactive animations, both in chemistry and in physics as well as interactive exercises and games. It also includes a nice quiz in which you can test your scientific culture by guessing the year a certain scientific milestone was achieved. The layouts are simple and the interactive tools are straightforward to use and insightful. Unfortunately there is no way to download the animations directly and the whole site is available in French alone (as well as all the animations), which limits its use by non-French speakers. However, some of the animations, in particular those that look into the molecular structure, can be easily understood by a more general audience.
This particular link provides an interactive animation tool where the molecular structure of various molecules can be visualised in 3D. It requires the use of red-blue 3D glasses and allows for zooming in and out on the structures. You can rotate the molecules manually using the mouse or set the rotation to automatic. It includes a number of molecules (ranging from simple molecules, such as water, to more complex such as propanoic acid) that are split into collections based on their functional groups (ketone, acid, alcohol, ester, aldehyde, etc). The molecules are shown using typical ball-and-stick representation with different colours and sizes. It assumes some basic knowledge on the chemical structure, but for students it would be helpful to have a label identifying each type of atom. There is also a version that does not require 3D glasses:, which could be useful for use in class. It does not allow for automatic rotation, but you can still do it manually and the 3D structure can still be clearly visualised.

National Reports on successful experiences to promote lifelong learning for chemistry The national reports on chemistry successful experiences to promote lifelong learning for chemistry are now available on the related section of the project portal. The reports presents examples of successful experiences in the partner countries and the results of testing of ICT resources with science teachers.