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Chem 101 Book Answers (Ch.14)

Chem 101 Book Answers (Ch.14) - Chapter 14 Inorganic...

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Chapter 14 Inorganic Chemistry 14-1 1. 2,2’- and 4,4’-bipyridine are bidentate ligands (see below). Can each be chelating, bridging or both? N N M N N M M 2,2'-bipyridine is bidentate and a chelating ligand 4,4'-bipyridine is a bridging ligand 2,2’-bipyridine is a bidentate ligand because the orientation of the two nitrogen lone pairs can accommodate only one metal. 4,4’-bipyridine is a bridging ligand because the two nitrogen lone pairs require two metal atoms. 3. How many d electrons does Co 2+ contain? How many unpaired electrons do low spin and high spin Co 2+ contain in an octahedral field? Co 2+ is d 7 weak field high spin S = 3( 1 / 2 ) = 3 / 2 strong field low spin S = 1 / 2 5. What is the role of the magnesium ion in photosynthesis? The magnesium ion alters the electronic structure of the porphyrin and is therefore responsible for chlorophyll’s color.
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