Chem+P+Notes+11_08 - Lewis DOt Structures Chem P Lecture...

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

View Full Document Right Arrow Icon
Background image of page 1

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

View Full Document Right Arrow Icon
Background image of page 2
Background image of page 3

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

View Full Document Right Arrow Icon
Background image of page 4
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Lewis DOt Structures Chem P Lecture Handout Series #1: Ready, Set,... : 7/ afar»? / éé/m "741% “L 'l.l!!.='.'.'..'.'"‘!.'.‘fl!!.'lF!!'I!l'!!!'I!!.‘!‘g"!!‘5-'l'!"3'!"'"!'!?¥"!!F'"!'“FE-El!IIE'!.!-.!'-"'!"!!"".'!'R'!E!!!!!.!.!!!-!!"E!!!."!!.I-'! '- Single Bond: Double Bond: Triple Bond :5 u .’ 3F l} W ‘1 1a .- _ \ I I x I n u a u a n g h I n s I n I I I I I l I I n I l Ig_y:lflsg|j_uuzysiyn[[ngIglpglglzithlglIlqygggppgnsnrllllllIII-[III-lup.gym-nun!!!I.!.!'!‘"*'!‘.' Which is stronger: A single bond or a double bond? KW/ fl?" :M E «.61 Which is longer: A single bond or a double bond? 9.76 M 0 HOW about aQuadruple Bond? M 1;: md7l. “’74”. Jgoaé,‘ An same m, 6410 m We, HM, What Do Lewis Dot Structures Tell Us? 1- m (“a 7% "fléfV/o, w I m C) m I.” I I I Z l O I l | C) l What-DON’T Lewis Dot Structures Tell Us? your own. Arranging the Atoms l How to deal with the electrons. Formal Charges How to decide which structure is best when you have more them one option Resonance (3 cases) Octet Rule Exceptions PWNE‘“ e91 Your Commercial Announcement: Electronegativity I. Electronegativity is a chemical property that describes the ability of an atom to : attract electrons towards itself. (From Wikipedia) -. r In easier terms, electronegativity tells us: A0 ”" LM/ 5’” “2g” WVA 5 “C ’ gW -: Wan/é 6 if, M/fi E g thaagmivfiy t was “I 2 fines a a; 5 a 3* 3 ' its is; {is as: m is: é .Pi’ 9,? q . Lewis Dot Structures Chem P Lecture Handout Series #2: Arranging the Atoms (aka: Um, which way do I go; which way do I go?) For most molecules, the first step to drawing the correct Lewis Dot Structure is to draw the arrangement of the atoms. The rules for this are not set in stone and after awhile, you’ll get a “feel” for this. But here’s some guidelines: Helpful hints when drawing the arrangement of the atoms: 1. ‘ Cm "/34 M ML, grara~ar0§ pafi/Zflqvlgflny/ Z4” muAf/f 512%» fo/fa‘uuM/f‘; atahl/g 2. [3 fax 3. to M4 was MA (7% M w— M 5?: 716 73/ 9%“ '\" jg! (em/#VL K) 4' {ya/Jr nan/46 f9?) Mn X’s) ’Y/m/ 4-4, 0/30 £55579: M6 4/4?” Tymh‘j Mini 5. If there is more than one possible arrangement of the atoms that might be right, you have to consider them all. Don’t guess. We’ll learn in a few minutes how to decide which is the better structure. . [74 0 n/t/CWCWM VM Let’ 5 try a couple: Draw all unique arrangements for CO2 cacémo Draw all unique arrangements for 802‘2 Q S 0 & fl 5 1. If they give you an order for a molecule that is 3 or 4 atoms, it is probably the correct order. S‘C/V (M; sec -/2/ 2. For compounds with more ato 5 them, chemists will often give clues to the structure. ‘ H / a l 544 0&0 , } . H O C # lm1 H. O 3 \. r r}, 3 2 0 «1 rec/’9' ' rr 0th of the compounds we just did have the same molecular Informula. I gfivafir/ (5mg: C: He. 0 Two molecules that have the same molecular formula but different connectivities are called Structural Isomers. These both have the exact same atoms in them, but how they behave chemically is completely different because of how those atoms are arranged. Notice What is that formula? ...
View Full Document

{[ snackBarMessage ]}

Page1 / 4

Chem+P+Notes+11_08 - Lewis DOt Structures Chem P Lecture...

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