BW03-F2009 - Chem 203Lg Lecture 3 Basie flrganie...

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Unformatted text preview: Chem 203Lg Lecture # 3 Basie flrganie Chemist-5r | Tuesday. September '1 {NH-“lulu! Tepice ‘1 . What ie ergenie ei'Iernietryr‘?I 2. Building up meieeufee from atoms. 3. The periodic table. Emun‘I-IL-Wn What is a mclecule? melecule a sufficiently stable greup at at least twe atems held tcgether by chemical bends. water = H20 Emu-.51”.- Drganic Chemistry organic chemistry the scientific study at mclecules that principally ccntain cerbcn and hydrcgen. - |Ellrganic mclecules may alsc ccntain ether elements. including nitrcgen, exygen, phcsphems, sulfur. the halcgens. etc. - The different shapes and functicnal grcups cf erganic mclecules determines their prcperties. Emun‘I-IMH Organic Molecules Ttpreneyir fBoehrtnger-Ingelheim]: HIV protease inhibitor administered to treat HW infection. - FDA app-toyed in 2005. - Used in combination literacy. Sequinayir {Roche}: HI'I.Ir pmtease inhibitor administered to treat Hliur infection. . FDA epproyed in 1995. 1 Used in combination therapy. Tmun‘rlbwn Atoms Atoms are made up of a nucleus and an electron cloud. Nucleus contains protons and neutrons. K“ \‘fi The atom is held together by C) the ne atiyel charged - I l - electrons ing a racted to the 1 , positively charged protons = W/ opposites attract! Emun‘I-IL-Wn Bshr Model sf the Atsm Elssfl'sns srs srrsngsd ll'l "shslls" sr “srbltsls” Nuslsus = prstsns + nsulrsns {nuslsus hss s pssitlvs shs rgs] KC“? VJ First shsll hslds Esssnd and third shslls hm slsstrsns ssn hold 3 slsstrsns rmunh-Ilaw" T Sums Exsmplss: ”fix 3"“. O O Q) {Q} pmlsn and 1 pmtsns and print-ans and pmtsns and slsslrc-n E slsstrsns E sfsstrsns 1D sl-sslrsns vslsnss shall ths sutsn'nsst shsll sf slssfl'sns. The Periodic Table 5 P k 1 2 H He hym-ogm neiurn 3 a. e '3 F E: 5 1D Ll Eie E C N D F hie it'niurn hay-Ilium bun-m cerium rim-gen oxygen I'lmr'ne new 11 1E 15 1E 1I':r 13 Na Hg P E El Ar sodium agreed - modifier 91 eurrur cHofire argon 3:- Atmne are arranged on the periodic table in floor of increacing no. of protons. Tmun‘rlbwn Reactive va. Inert (electrons) Now, consider the electrons. la an atom with a certain number of electrone moet etalele‘?ll = DETET RULE Sodium =11 o+ ano1‘re- one electron in the valence ehell Sodium wanta to lose one electron {11 p+, 10 e-] and form the aodium ion rmufi-IL-w" 1|] Peaitively charged element is called a eatien Ha Ha+ tumult-ram" Negatively charged element is ealled an anien [6) {C} F F - [l #] Fluerine reaeta te take an extra Ha aleetren: nean alreadyr has an eetet and is stable. rmuu-u-IL-w" 12 Octet Rule (3:1 (”'51: Ha+ F Ha Tmun‘rlbwn Hew de we get an Octet? I By leaing an eleetren in farm a |::-::naiti~.ral1.nr charged ien - eatlen. I By gaining an eieetren to term a negativelyI charged ien - anlen. I Thrdugn bending to another atern and “aharing' eieetrena {next lecture). Emun‘I-IL-Wn 13 11 Haw Eaay ie it te Gain an Electron? . If it takea a let ef energy le add an eleetren, the atem ie eleetrepeeitiye {would rather be peeitiyely eharged than negatively charged). - If it is tel-tee just a little energy te add an eleetren. the atem ie eleetrenegatiye. I F'eriedie Trend: ELEGTRDNEGATIUIW rmum-u-Ilaw" 15 Periedie Trend: Electrenegatiyity 2.1 HE. ”E I193 125 21] CI Ar .15; 256 32 rmuu-u-IL-w" 1E me small ta big... bandlng Atoms Malaculaa Drugs daal n ufahapa an functlnn Haw that wa knnw what an atur'n la. wa can atart bullding malaculaa halt lactura... Tmun‘rlbwn Impartant Canaapta - What ia a malawla‘? - What is an atom? - What ia than actat rula? Can you pradiat if an atom will gain or lose alaatrana? rm".-:mn 1? 1E ...
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