Framework Molecular Model Student Kit |  | Author: Brumlik
Publisher: Prentice Hall
Category: Book
List Price: $52.00
Buy New: $42.06
as of 9/5/2010 17:08 CDT details
You Save: $9.94 (19%)
New (10) Used (5) from $42.00
Seller: Amazon.com
Rating:  7 reviews
Sales Rank: 179,034
Format: Box set
Media: Hardcover
Number Of Items: 1
Shipping Weight (lbs): 0.6
Dimensions (in): 6.9 x 6.2 x 1.5
ISBN: 0133300765
Dewey Decimal Number: 572
EAN: 9780133300765
ASIN: 0133300765
Publication Date: February 25, 1965
Availability: Usually ships in 24 hours
| |
| Similar Items:
| |
| Editorial Reviews:
Product Description
Framework models built from the FMM set show to scale the mutual relations of atoms in a molecule. The molecular framework is specified by internuclear distances and accurate bond angles. Multiple bonds and pi orbital systems are designated using special connectors. *features only two basic components - metal valence clusters (tetrahedron, trigonal, bipyramid, and octahedron) and plastic tubing - that allow the representation of any atom of the periodic chart. *metal valence clusters define bond angles precisely and can be adjusted to construct models of molecules with unusual bond angles. *color-coded plastic tubing enables clear identification of atoms. *2-color tubing of univalent atoms bonded to other atoms shows univalent atoms with correct covalent and van der Walls radii. *shows molecular orbitals and electron pair orbitals. *components are easy to assemble and are reusable. *includes a separate booklet of instructions and a carrying case.
|
| Customer Reviews:
Showing reviews 1-5 of 7
 Organic Representations June 16, 2000
Nick Shaw (Minnesota)
11 out of 14 found this review helpful
This set is the perfect set for any first year organic student. It gives a perfect representation of interatomic distances which is not possible or accounted for with other sets. It also allows for the compostion of cyclopropane and othe larger cyclic compounds. A great compliment to organic study
old, but very useful - does what other models do not November 1, 2008
Margaret Pellegrini (Rochester,MN)
1 out of 1 found this review helpful
I have the 30 year old predecessor to this set and it was very useful then. It is very useful again since I have been teaching Chemistry to middle school students and investigated other model systems, but no other modeling system enables people to build models of double and triple bonds which represent the theoretical regions where the electrons are found. Thus, my students have been using the old kit and I have been buying more kits.
Essentially, for a single bond, you just connect the atoms with single tubing to represent the sigma bond. For a double bond, you build a framework above and below the single bond to represent the area where the second pair of electrons would be found in the pi bond. For a double bond, you build a second framework in front of and in back of the single bond for the second pi bond.
These bonds are #1 straight and #2&3 a square, but the electrons move around in a "cloud" around the straight or square tubing. When I demonstrated this with my students, I made "clouds" out of construction paper and attached them to the tubing to show the actual distribution, but it basically follows the tubing. You can't show the distinction between the sigma and pi bonds using any other modeling method that I have found.
Space-filling models don't show a nucleus, but the nucleus is obvious with this set: it is the "jack" where the tubes come together.
If you are serious about representing the actual relative sizes and bond shapes, this is the modeling set for you.
Molecular Model May 27, 2006
Alexandrina O'garro
0 out of 4 found this review helpful
Shipped promptly. Received in excellent condition, and earlier than expected date. Packaging very secure. Model will work well with class. Highly recommend.
 Deceptive packaging January 11, 2007
Chemy (Toronto)
3 out of 3 found this review helpful
This is not a space filling molecular model set like the picture on the box implies. What you get is a set of jacks and plastic piping like the straws on juice boxes. A model built from this kit looks like a tinker toy. Still, I found the kit extremely enlightening.
The jacks represent the different geometric shapes that single bonded, double bonded, and triple bonded atoms configure into - tetrahedron shapes, bi-pyramidal shapes, and octahedron shapes. You have to cut the different coloured plastic tubes with an exacto-knife to given lengths which represent the radius of the atom you are working with - a black tube is cut to 1.67 inches to represent one radius of a single bonded carbon atom. This attaches to a jack, which is the connector, and you attach another length of tube to another prong on the jack for the atom which is bonded to that side of the carbon - it could be a red tube for oxygen.
The set required me to do research into advanced structural concepts of atomic bonding - i.e. - sp orbitals, sp2 orbitals, sp3 orbitals - and has lead me to an area which I can research in more depth later. In this way it has been very enlightening.
Although this set is not what I expected or wanted, I am glad that I ended up with it because it has revealed in a very simple way the complexity of moleculare structure and has taught me a lot about quantum mechanical structure of molecules.
 Helpful Kit, But Case Has Design Flaws October 2, 2009
Mark Hurst (Arkansas, USA)
1 out of 2 found this review helpful
This kit is a must for any first year organic chemistry student. I liked having the different colored straws representing the different atoms. The things I disliked about this kit is that you have to cut the straw lengths yourself and hope you don't make a mistake. Second, there is no "jack" for sulfur atoms. Lastly, the kit is not designed to house the final cut straws properly and it is not designed for portability. You need to keep some sort of rubber bands or clamp on the plastic case to keep the lid from coming off; terribly designed, but very helpful in the long run.
Showing reviews 1-5 of 7
|
|
|
