Coordination Compounds, Lecture notes of Chemistry

coordination complex is a chemical compound consisting of a central atom or ion, which is usually metallic and is called the coordination centre, and a surrounding array of bound molecules or ions, that are in turn known as ligands or complexing agents.[1][2][3] Many metal-containing compounds, especially those that include transition metals (elements like titanium that belong to the periodic table's d-block), are coordination complexes . Coordination complexes have been known since the beginning of modern chemistry. Early well-known coordination complexes include dyes such as Prussian blue. Their properties were first well understood in the late 1800s, following the 1869 work of Christian Wilhelm Blomstrand. Blomstrand developed what has come to be known as the complex ion chain theory. In considering metal amine complexes, he theorized that the ammonia molecules compensated for the charge of the ion by forming chains of the type [(NH3)X]X+, where X is the coordination

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O-S= +3 CR |= Gxt) <6 CN = (61) = 6 Changing C0-S}) Fixed Cen’) id ® ih Rit, eater: i ans “% 6:4 — Dal a} “ulhich ot “he Btuisiny __Witl give _tahite ppb min with BAC), | Ss Us ou, 1] S04 | ©| Pihectve At. No- [ Sidguiek Rule [EAN = if Beth: =f (0. Sb) ~Cevat § d »| EAN i¢ the number of elector of CMA after frmation of tamplex d Rice So Sidgwick . the metal Tons Conkinue Accepting elecken paie 4 Gram ligands unl Ine EAN ot metal became equa | & dy fk -no-dt next therk gas. G A__| ligands Denkicity ON_| CN | “pe EAN 4) |KeLFe Cons CN | Mone | +2 Hemeleplic| 36 ) ik Go) et | ens | thars0[/49 Htndleptic| 35 3) a Cnt3)4) Ga_| Nis Mono |B Homete pic] 35 4) Ly; (CONTE Co Mone | AO} Hemelepte | SE. s) |G Gadla cr HO | Mon | +3 Homelepice] 33 6) (Goa, Cad, Co | Cle | “GE [43 Hderlypi¢ 36 1 ENCLDEae “Ag | Nig | Mono | +4 Hombotie | 5S ®) Creat | | Oe | tone fea | 4 | Hombre! 52 AIF IN PDF Le | o [gy 4) (re Gunde! t eb [Nas | tons [42 Horwlegtic! 84 & Sa or By [ones YOUVA | | | a: ne | = _| Atomic number of next noble qas =_36 ye E@®D. Follow _sidguiek_ vale uqlye ot x" =? | 26~ OF zC2)= 36 ete _De= 0 w=5 s+ FTupac Nemenceture & CGmplex Gmpsunde ~~ B_aattion is_precen'e CC then fs name alwayc unitten firsts @-ordiwahion ampuad. after tnak _covike pame of anion. oe iad Naming of _cordinats on Squaire | sphewe | spare : © | First £ all_ name A ligand is wrtten in alphabe cal order den name of CMA is antes Fdlowing Oridakom state in_Yoman numerals in brackeks. 2 FE mutiigte ligands ave present Dis © | Write them in alghabeli cal ordey , @ | Th case of abrevoked name of lind, tne Free alphabet 16 considered Ar alphabetral aedeae Prefixes di wei keto etc: ane used far wat tho liciby f same Vigands ® | TE ane ot Ligand — already Contain numeral profine s Cd; | Hhen ave use ig kvig ebeake) ©) |_ “TE complex fon a lis, F recent then name of CMA ~» ‘is_some as ‘he eloment . @ TH complex ion is anion, then name of metal ends with x Ye ’ For_some metalc their latin names are ged MT owitreris s§ Page No.: UPAC Examples Date: YOUVA | 4) Lo Quis) 4 Go). | Cls aera _ TTekraommine. diagua chromium +4 GW) +42) +3C4) <0 CI) chloride Xe4+Z 2) Wes Cen) 1. C504) “Wis Cothane = 4,2.- djammine) +3 G) x2-6=0 cobalt Car) A= +3. 3) Cou Cnn del . “Tetraommine. Copper CD) jon xr 4ED) = 2 4) [ fe Gho)s (nes) Fentagguaise thie Granake iron CD) ion Agia isethio cyanete 2) Cet Cn) Cen, |” Bis. Cote diamine.) Abie sul hate plokinam GE) on. Al CPt er, Cnitada J [Brg “Tekmammine dibromiie, plckinurn @ \omide 11 | CG Ow); sda fentacmmine carbonate cobalt CuL) chlovide tal Uco Gon): Cui), | “TWammine “Winibatle cbalt Cad in q\ cs @s] fents carbony| wn @) 19} CRh QWs); cn), ] “Tetra amine bithie Cyanaderhs dium Cw) 4 MT ow tf Fs Ss ws ben 2762 Ext HY Ex-2 Page No vm] Date: Ww) || CN; tial __Tetra.cyanonickelate Cen | 2 nUes Goods)” “Wioxalate cabal Car) jon (3) Ue Cone 1 Hexacy ancferrate CI) jon (4)| Nag Ceo Co} cadiumn Chexanitrite — N.) cabateate CIE) i Ka Cal Conde) | Pobassium vioxalate aluminate Cir) (6) Nag Care] Ceyolite | Heraflusro aluminate Cl) ion Galler ~cemnglex jon jon val are - [pe (NY) Grech Cons) | Ammine bromo ‘clove nitro -o = platinate @) \g] =f Ly Giro), Con pal Diaguatelralydroxe duminate GD) ien 9] [No)Cee) Ca). Cen), | Dichlorobis Celine - 4,2 diamsine) elainum CBD) nitrate ~ Ged ns_ 7 nd —>owter orbytal comple “Th ocbahedcal comglex, if Grt)d orbitals. areuced Rr hybvidis akon alsng with _ns. and ne. orbital then it i¢ Ase hybridisation - Sudy Complexes ave known as “Inner orbital / low spin paired | strong Seid | covalent Tn coset nd“ oital hybridisekon is _se%d* and Complexes are Known aS Outer orbital / High spin Sein Sree { Weak etd { Tonic com plexes } NOTE: On the basis of shyength trove are bwo typec of lig and. SFL —- Strong Bad \igand WEL 7 Weak field ligand SEL : WEL Paiving takes place «| the hybrid orbital used by metal ion pein = | >) T- “2 ar Sc <. Cy) < 8S < NOT < se7 < OH < | _C = donor > N=donor > O- donor > Helogen dense ke ee Se” Yd wet | CH, C007 <<. C2047 re Fe Hole NCS < EDTA < Nay eink < No < CHa < Cols < CN ~< Co. - - ale SFL ‘J/ NoTE . Th presence of 4d and Sd => SFL all metals - - rr Nty js Strong field ligand in presence of Fe a Mo, Cock as__ Weak field \igand . C04 * ack as 4 SFL in presence ot co. F ack os SFL in ecosence of Ni yi al a¢= - | Y.0 asa Strong Seld ligand in presence of a, a. = ea: | Cui Conal a+ 41) =-2 [ms 42 re Cada as" Wal lal] = Grd 3d® Ge" 4p CN” —> SFL ) } | 0 ee a CN = {x tah Aybridisakion = = dbo Magnetic = _Diamagnetic Geometry: = Square. planar Heture. Jeo il Unpaired dlechon = 0 a | a 4 a a, es el ee Page No YOUVA Dote | Gystal Field. “Theory Cet) eg = dx? y* dz? | aie Agenerated | es = day vay ne av ple evited bering 4 Kis Yeory, Cnt consi er ste pei conaide hegabve. poink charge and wevisal _Vigands ove consider og dipale point charge and there is { Herkractic. abtrackon ehween ligand and Cm. en_\j e 2 E - orbital \pave ine longer came energy and Srey split Premsslvec ints diferent gek of Energy levels. ec density - \olw axis [aa as dae. | Go density — ri axis ate < GS C day", d2? | ) SY ( “This Spitting ot orbrtals ys Koon oc Crystal Feld celifking. and : strength of Spitting depends upen__ sorting of ligands- ZAC ro + | Th_ockahedval complexes Z| Vigand apereaches CMAT along axis . As 4 Wesult sasy Cog) ovbikals _expierence more repulsion vs have. mare Snergy as Compared to to orbital. rsh = ) Code) ney + CAs ites + ne Neg—» No-fe7 in & ovbital Ao — Splitting energy of h iy —> No-of o7 in hog erbibal ockahedral Gra plex. h—> No: of paivs of e.7 P —» Painna enerey a ty A> : fairing takes: place _ Ligand—> SFL <{ + No pairs ey Lig ond —> WEL Mot ow tf Ff SS Page No. YOUVA eg Date A | \ a rn es song OE sil | [See Contre: | te Code] Fe Crd 94°” CN —> SFL—» fairing CN= 6 LI6 Ww ik----— -~--— 41% 4 \fokell€) i dsp" oekahedval Onpaived e =24 ( dimagne be [u=s | : Oni con asNie Gar] 34? G6" Ge? Gee = UCo.4a) 4 Cn= 4x1=4 ; (0.6A) 4 3p } C\ —> WEL —> No saivin = 24-64-34) 8 AU no Csé= 3p _ 0.844 a aula) 44 ee SS Av | AY eg —_M 1 WoT iF S$ os (46) Page No 4 YOUVA ” bate a allt i ca Ai wil bt \ 4’ Wl 4 lvl : ‘eg! aybitals paints directiy ak ligands , $0 ansymmebic Siling of cleckrons “eg” orbitals causes distortion 19 shah abeal qeemery obitele Kes blu Kigond. aperoching direction so ‘ ry kag Uneyeamels.cal Alling of elechron iy “is mbita| causes (xs dictertion which is negligible. | Fackors atfecting CFSE ® Qhage on OMT [cfse X charge on Cm kKalrecendel < ky Ure Conde] @ Geomeloy of_Comalex a4 A 4 >| Asp. ple plan re 4h 3 “LA sq.-planie > (\s > At r = Rouge Some Colourtyl sweets from _otfice ar ow 1 + =. 5 containing ualer | gc © 2 ome Veena YOuvA | Noncy eat nine jn Conteon Coyridoay i ee a a = —_ @ | Transikion — Series of. ot (mI _ etal 2 [3 BIA 2 aq< 4d < 5d : Gyddt < Gaad* < Gad 3d 4d qo ®) Seegly of Ligand K_CFSE Ce Gnd s Creamy s GeGodke l* > Ce Gud Shength : CN > No2 > Hoo > of” At= 4 4 ae ax He Glours in CC Due 4» unpaired 7 presentin CMT. CT Gc 13 HB | a" = [Ar] 3d G* 23) on a T= (rad? hs° ct 1] In a one d’ elechven 1S present in 42g (evel - TE Night corves ponding 4p categy of yellow ~ green region js absorbed by the Comm lx & it ect excite eC Ween he) Lease! 4 “eg! level As a veculk complex show \ed- violet cslour, Which is Com plementry colour of absarbe light. Copnp lex Compound show d-d trane'sti on (Th obsonce of ligand crystal fetd Se litting doec ast accur| and Com pound 1S. cileusess . LAT N Structure ne ke different bon ding " jsorm ers i ; = | youws | —— fn Metal and Ligand ') | Tonisation Amers Se These isomer give different ion im their selubien » This dye isomers occas when counter jon behave as_a “P tguids ~n Xhis isomers ligand & counter ion interchange usin each cher. eg: | UO (Ha) Br] Soy tho Leo (nita)s Br J “ S0y give udlyite colour pet of BaSSy with Bat? jon *) Linkage Asners * [Ty Ahese type of isomers atleack one embidented Vgand js present hese compounds have same melecular formula and_cunters ion bub but the meade of finkage of embidented lig and is Afferent - ’ oe 2) | Wydvaked comers” + {Th Wece compcunds Na-of Selvent molecules gre present as ligands Gas molecule of solvation Chydration ) are. “different » 9:| CrCls CHeo —> [Cr Gs) 10, —> Tor Giese Je] + G-ordinalion “Tsomens Anese isomers beth cattens and anions are comglen entitie “Tn these icomes Mutual exch ange “of lig ands takes place Leroeen these complex enti es Co Crtae J Cty Con) 6) Cou Cutts) ad [et OH | Cee Cnide) Lode) | CuGrs ] Teas] Stereo isomers : ate occur: e to different Spatial Ovrangement: ef Nigands arround Nye Cma - 1)| Geomelical Isomers Bigs = Similar ligand at adjacent pesitien mae a Trans —> Similar ligand at oppesite pasition | Gry taahebal t \ No GT pessible in tetrahedra! M @mplex bemuse relative positions “at 1 ey: of ligands ave same, ws0et each cher +| Gr in Square planay 4) | Cag }->[Neo ] | 4) (Nabe )—» 2 GT 2) [Mash _|—> No Gx 3)| LE Mab2}—> 2 G& =) Cab cd \-—> 352 €]| Cm Can) ak] —> No Gr eee ) tm Cag) ba_| —>_ No GT 8)) Um Ge) C2] —s No GT WL Ce) ob — 2Gz [im (a8)2_] — By Gr