Question

From the following list of metal ions and ligands, construct metal complexes with properties which match that described in each part of the question and provide a brief explanation. (Only one example is required for each part of the question, e.g. [Fe(H20)6]21). Metal ions Ligands (in order of increasing ligand field strength) [ < Br< <C1° <NO3 <OH <ox?- <H2O< Ti(IV), V(III), V(IV), Cr(II), Cr(III), Mn(II), NH3 <en <bpy < PPh3< CN=CO Mn(III), Mn(IV), Fe(II), Fe(III), Co(II), Co(III), en = ethylenediamine = 1,2-diaminoethane Ni(II), Cu(II), Zn(II) bpy = 2,2°-bipyridine ox?" = oxalato = C2042 i) A colourless diamagnetic, tetrahedral complex ii) A kinetically inert, octahedral and diamagnetic complex iii) A labile complex with an effective magnetic moment (ueff) of 3.9 B.M. iv) An inert complex with an effective magnetic moment (ueff) of 3.9 B.M. v) A octahedral complex with an asymmetrical absorption in the visible.

Answer 1

① A kinetically imeat, octahedral and diamagnetic compler. 1+3 tarbiy [co (nius)e] AN= 's octahetuse a strong field түрту у n Pesona > Low spin complex → cfsen - 2409+2P → Due to wary high efse, it is kinetically inert Co tz mat (diamagnetis) with left = 3.9 B.M. ☺ Alabile complex (4₂0) 7 high spin complex ligat, +2 t t es of imporred No. o ܠܐ 0,Mܐ field amech electron = 3 t t ttg Magnetic momenti un(n+2) B.M =13 (3+2) B.M = N15 B.M = 3.9 B.M.

i An inert complex with Meff = 3.9 B.M or (CN) ] Low spin complex (strong field ligane) hort cats d3 - - es + + ttg M=V3(3+2) Vio à 3.9 B.M tetraher 2 É a colourless diamagnetic 1. Znal ² Zna is Oznt? (do system) e a msak field ligand Full filled config 4 t ft ty long de #t es Diamagnetic Cobwrler » No d-d transition possible.

Rxn Kinetice Thermodynamic Kinetic slepuise Overall stability stability اطما inert (topy Imin) (+/< Iria) Substitution axn occurs readily. substitution ourns are sponkneous 1 x inertness [ efse a bility ox mertress & a. Tobiliny