3 - Review: Electronegativity electronegativity (EN): the...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Review: Electronegativity electronegativity (EN): the measure of the ability of a bonded atom (or functional group) to attract electrons toward itself. • EN increases as you move up and to the right in the periodic table • as you move up a column, shielding of outer electrons decreases • as you move to the right in a column, the nuclear charge increases H 2.2 L i B e B C N O F 1.0 1.6 2.0 2.6 3.0 3.4 4.0 Pauling value Ch 1b scale N a M g A l S i P S C l 0.9 1.25 1.6 1.9 2.2 2.6 3.2 Pauling value Ch 1b scale K B r 0.8 3.0 I 2.7 The Ch1b Electronegativity Chart: Functional Groups Functional groups : the substitution of carbon chains with atoms other than C and H • substitution with more electronegative atoms results in a formal “oxidation” of the carbon • the oxidation level of a given carbon can be assigned by the number of bonds to more electronegative atoms • functional groups can be organized according to their oxidation level alkane oxidation level alcohol oxidation level aldehyde oxidation level acid oxidation level carbonic acid oxidation level –2 e- oxidation +2 e- reduction –2 e- oxidation +2 e- reduction –2 e- oxidation +2 e- reduction –2 e- oxidation +2 e- reduction for nomenclature guidelines, see RC Ch.7 Functional Groups Functional groups : the substitution of carbon chains with atoms other than C and H • some common functional groups are shown below for nomenclature guidelines, see RC Ch.7 alkane oxidation level propane BH 2 ethyl borane SiH 3 ethyl silane sometimes alkyl groups are generically designated as "R" alcohol oxidation level OH ethanol (ethyl alcohol) SH ethane thiol O diethylether NH 2 ethyl amine N H N , N-diethyl amine S diethylsulfide...
View Full Document

This note was uploaded on 11/10/2011 for the course CH 1b taught by Professor Natelewis during the Winter '09 term at Caltech.

Page1 / 12

3 - Review: Electronegativity electronegativity (EN): the...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online