Esters have the functional group -COO- where one of the oxygens is doubly bonded to a carbon which is in turn singly bonded to another carbon & another oxygen. Esters are biologically important & occur in compounds such as triglycerides and as phosphoesters which form the backbone of DNA. The 68827W student set includes 24 sp3 carbons and can build multiple ester models all at once for comparison including those shown in the image: methyl methanoate (right), methyl acetate (left), ethyl acetate (top).
You can learn IUPAC nomenclature by building these simple esters: methyl ethanoate, methyl propanoate, methyl butanoate, methyl pentanoate, methyl hexanoate, ethyl methanoate, ethyl ethanoate, ethyl propanoate, ethyl butanoate, ethyl pentanoate, propyl ethanoate, butyl ethanoate, methyl benzoate, ethyl benzoate, hexyl octanoate & others. Use the free Indigo™ Instruments 3D Molecular Model Builder in "Orbit Flexible style" to help you investigate even more complex ester such as pheromones (ones ending in 'ate'; & you may also need to switch to the NCI database).
|68186-20||Wobbly bond, 20mm, each||60|
|68186-30||Wobbly bond, 30mm, each||60|
|68186-35||Wobbly bond, 35mm, each||12|
|68186-50||Wobbly bond, 50mm, each||12|
|68216C||Atom, Orbit, H "a", white, 1 prong||36|
|68217C||Atom, Orbit, N "a", blue, 1 prong||1|
|68218C||Atom, Orbit, O "a", red, 1 prong||2|
|68219C||Atom, Orbit, F "a", light green, 1 prong||6|
|68220C||Atom, Orbit, S "a", yellow, 1 prong||1|
|68221C||Atom, Orbit, Cl "a", green, 1 prong||6|
|68225C||Atom, Orbit, C "b", 180 degree, black||1|
|68228C||Atom, Orbit, S "c", 100 degree, yellow||2|
|68230C||Atom, Orbit, O "d", 110 degree, red||6|
|68241C||Atom, Orbit, C "j", planar: 120-120-120, black||1|
|68242C||Atom, Orbit, N "j", planar: 120-120-120, blue||1|
|68244C||Atom, Orbit, C "k", tetrahedral, black||24|
|68245C||Atom, Orbit, N "k", tetrahedral, blue||4|
|68246C||Atom, Orbit, O "k", tetrahedral, red||4|
|68247C||Atom, Orbit, P "k", tetrahedral, purple||1|
|68248C||Atom, Orbit, S "k", tetrahedral, yellow||1|
|68251C||Atom, Orbit, metal, tetrahedral, grey||1|
|68253C||Atom, Orbit, N "l", octahedral, blue||2|
|68255C||Atom, Orbit, S "l", octahedral, yellow||1|
|68258C||Atom, Orbit "l", octahedral, grey||1|
|68259C||Atom, Orbit, C "m", trigonal bipyramidal, black||8|
|68260C||Atom, Orbit, N "m", trigonal bipyramidal, blue||3|
|68261C||Atom, Orbit, O "m", trigonal bipyramidal, red||3|
|68416C||Orbital for showing lone electron pair, white, Orbit style||4|
|68417C||Orbital for showing lone electron pair, black, Orbit style||4|
|68533||Orbit bonds, grey, 35mm, extra rigid, 15/bundle||1|
Good kit. Fast delivery. It made visualizing chair/boat conformations easier, helped figuring out chirality and stereochem as well. The clear bonds however were sometimes hard to work with as you really need to shove the parts into them, and can slow you down if you're able to use a model kit in exams. As a result, I like using the more rigid grey bonds for most of my builds. The bendable bonds are good if you need to visualize your alkenes and alkynes.
Good quality and assortment!
These are great kits for a great price. Very useful, and easy to buy extra parts if you want.
Glad to hear it. This model set is supported by our 3D Molecular Model builder so any time you want to augment it, the tool will tell you what you need.
Thanks for the feedback. The rigid bonds are great for chair boat flips but eventually wear out with repeated use. The clear bonds are tougher to work with at first but eventually loosen up enough to make them easier to use. They will last over many more uses which is good if you are taking chemistry as a degree.