The purpose of this lab is to work with 3D model kits to get a better feel for the structure of these molecules. To prevent people from dry-labing this experiment, the pre-lab is short. You will need to (on a piece of recycled paper) draw the Lewis structure for the molecules below. When you come into lab, you will have access to model kits to make the actual models. Then you will be asked a series of questions about said structures.
The molecules are a little different then the ones you have already drawn in class, but remembering what you know about what each atom 'likes to have' (oxygen likes two bonds two lone pairs, etc.) will help you. Your instructor will check the pre-lab questions when you walk into lab. Make sure you have the signature of your instructor BEFORE you start the lab. You will staple the pre-lab to your lab worksheet.
There is no lab report for this lab. Completing the lab worksheet is all you need to do, and it will be due before the end of the lab period.
-- Bring your lecture notes to lab --
Pre-lab molecules (draw complete Lewis structures for each of these molecules) Do these in pencil
1. Freon-21 CHCl2F
2. Isopropyl alcohol CH3CH(OH)CH3 (bolded C bonded to 2 C, 1 O, and 1 H)
3. MTBE (gasoline additive) (CH3)3COCH3 (Oxygen atom has 2 single bonds to 2 seperate carbon atoms)
4. Isopropyl amine CH3CH(NH2)CH3 (bolded C is bonded to 2 C, 1 N, and 1 H)
5. MEK (a common solvent) CH3COCH2CH3 ( 1 carbon oxygen double bond and all C in one row)
6. Propylene CH2CHCH3 (multiple bonds exist)
7. Acrylic acid (used to make plastic) CH2CHCOOH (one CC double bond, 1 CO double bond)
8. Butyne, CH3CH2CCH (one multiple bond)
9. Acrylonitrile, NCCHCH2 (two multiple binds)
10. Salicylic acid, C7H6O3; 6 carbons in a ring that contain 3 single bonds, 3 double bonds (alternating). On one of the carbons in the ring a OH group is bonded. On an adjacent C in the ring a COOH (known as a carboxyl group) (one double CO bond) is bonded. All the other carbons in the ring have 1 H bonded to it.
11. Methyl Anthranilate, C8H9NO2. 6 carbons in a ring that contain 3 single bonds, 3 double bonds (alternating). On one of the carbons in the ring a NH2 group is bonded. On an adjacent C in the ring a CO(OCH3) group (known as an ester) that contains one double CO bond. All the other carbons in the ring have 1 H bonded to it.
12. Cyclohexane, C6H12 ring of 6 carbon atoms
13. Define what an isomer is.