Lec-38-Chap22-2-Complete

Lec-38-Chap22-2-Complete - Lec-38-Chap22-2-Complete...

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Lec-38-Chap22-2-Complete 12/7/2009 Transition Metal Chemistry. Complexes. Nomenclature. Geometry 1 Lec-38: Chemistry of Transition Elements and Coordination Compounds Chapter 22 1 The Fall-07 and Fall-08 final exams have been posted in Blackboard. Please print them out, solve them, and bring your questions to your workshop for the course review next week. p.1046a 2
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Lec-38-Chap22-2-Complete 12/7/2009 Transition Metal Chemistry. Complexes. Nomenclature. Geometry 2 Transition Metals and Coordination Compounds Much of the chemistry of d -block transition metals is due to their ability (because they have vacant d-atomic orbitals) to make coordinate covalent bonds with molecules and ions that have lone-pair electrons. Coordinate covalent bond: formed by the donation of an electron-pair from an atom to an empty orbital on another atom. H N H H + H + H N H H H + or H N H H H + 3 Transition Metals and Coordination Compounds For example in aqueous solution Ni 2+ is coordinated by water molecules in an octahedral configuration: Complex Ion [Ni(H 2 O) 6 ] 2+ hexaaquanickel(II) The molecules or ions coordinated to the central atom are called ligands 4
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Lec-38-Chap22-2-Complete 12/7/2009 Transition Metal Chemistry. Complexes. Nomenclature. Geometry 3 Transition Metals and Coordination Compounds Compounds that contain metal ions surrounded by ligands are called coordination compounds . Coordination compounds are combined with opposite charged ions (counterions) to form neutral compounds.         4 2 4 2 K Ni Ni C Cl solid state l in solution   Other examples:         22 2 2 3 6 2 2 6 Ni H O Cl Pt NH C Ni l cispla HO tin 5 Naming of Complex Ions and Coordination Compounds The nomenclature indicates the name and oxidation state of the transition metal ion, and the name and number of ligands in the complex.
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Lec-38-Chap22-2-Complete - Lec-38-Chap22-2-Complete...

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