Chem 250-02 Fall, 2014 Day 2 Anyone new ? Questions Team Work – Listen, Contribute, Discuss, Learn Syllabus hen … Chem Activity 1 Bond Angles and Shape.

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Presentation transcript:

Chem 250-02 Fall, 2014 Day 2 Anyone new ? Questions Team Work – Listen, Contribute, Discuss, Learn Syllabus hen … Chem Activity 1 Bond Angles and Shape Chem Activity 2 Lewis Structure e- Diagrams Nomenclature Workshop 2

How to Organize Organic Chemistry The Four Guiding Principles 1. One way to follow the electron flow ( ) from the e- source to sink. This is the choreography of chemistry. 2. Two general types of reactivity of organic molecules electron rich donors and electron poor acceptors 3. Three shapes of carbon in organic molecules and ions tetrahedral trigonal linear 4. Four bonds to carbon These are of 3 different types: single C-C C:C double C=C C::C triple C≡C C:::C

Chem Activities 1 & 2 Start with Chem Act 1 Model 1 Page 8

Go on to Model 2 Page 9

Go on to Model 3 Page 10

Go on to Model 4 Page 12

Based on the octet rule, which of the following line-bond structures is/are correct? A and B A and C B and D Only B Only C All of them None of them 20

How many hydrogen atoms are present in the naturally-occurring terpene α-terpinene shown below? 14 15 16 17 18 I’m not sure how to do this problem 20

How many hydrogen atoms are present in the compound cholesterol shown below? 4 5 38 44 46 I’m not sure how to do this problem 20

ethane < ethylene < acetylene What is the correct order of carbon-carbon bond lengths in ethane, ethene (ethylene) and ethyne (acetylene)? ethane < ethylene < acetylene ethane < acetylene < ethylene ethylene < ethane < acetylene ethylene < acetylene < ethane acetylene < ethane < ethylene acetylene < ethylene < ethane All the carbon-carbon bonds are the same length 20

Select the best condensed structural formula for the following molecule: (CH3)2CHCH2COHOHCOH CH3CH3CHCH2C(OH)2CHO (CH3)2CHCH2C(OH)2CHO (CH3)2CHCH2C(OH)2COH CH3CHCH3CH2C(OH)2CHO

Which of the following represents the ground-state electronic configuration for carbon (atomic number 6)? 1s22s22px22py02pz0 1s22s22px12py12pz0 1s22s12px12py1 2pz1 1s12s22px12py1 2pz1 1s22s22px02py02pz2 I am not sure what these symbols mean 20