Chemistry of Coordination Compounds OTransition metal compounds (demo samples) Ovariable oxidation numb er ●colored ●unusual comp osition Ooften contain covalent compounds bonded to the metal ●nydrates OLewis acid-base adduct Ocoordinate covalent bonds Ounusual magnetic properties XV-6
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The Structure of Complexes OContain coordinate covalent bonds OUnusual composition:Central metal ion or atom ligands counter ion (if needed) OCalled complex ion if charged ●[Cu(NH;)a]SO4H2O hydrate anion ligands central metal ion 2 V.7
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Coordination Sphere ONature of coor dination compounds is determined by both the oxidation number of the central ion and its coor dination number. OThe coordination number is (mostly) constant for a metal with a given oxidation number. OFirst coordination sphere:central metal ion and its ligands 8 -8
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First Coordination Sphere D -NII. n- IL, A.[FE(CN] C.[PHNIIC] coolinalior NTT: coordiralinr n1 mher一f nimber-6 XII; TpnleR2 pdb /M1.3 h B.[TuNH )] coordinalioc mimher -4 Pnt.plb XV
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First Coordination Sphere OCoordination number is often 2 x oxidation number (many exceptions) OMostly predictable geometry: OCoordination number =2,linear OCoordination number 4,square planar or tetrahedral OCoordination number 6,octahedral 10 10
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