Coordination Chemistry Solutions: #14

14.* (1994 2 1) For each of the following complexes: (a) calculate the formal oxidation state of the central metal, (b) give the d electron configuration, (c) deduce the coordination geometry, (d) predict the number of unpaired electrons and (e) give the number and types of steereoisomers, if any (indicate whether these stereoisomers are chiral).

I. CoCl42-

a. Co(II) b. d7 c. tetrahedral d. 3 unpaired electrons e. no stereoisomers

II. Fe(CN)63-

a. Fe (III) b. d5 c. octahedral d. strong field ligands = low spin: 1 unpaired electron. e. no stereoisomers.

 

III. Cr(acac)3

a. Cr (III) b. d3 c. octahedral d. 3 unpaired electrons e. 2 stereoisomers, which are a pair of enantiomers

 

IV. Mo(CO)6

a. Mo(0) b. d6 c. octahedral d. no unpaired electrons e. no stereoisomers