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Ch.21 - Transition Elements and Coordination Chemistry

Chapter 21, Problem 21.142b

An alternative to cyanide leaching of gold ores is leaching with thiocyanate ion, which forms a square planar gold(III) complex, [Au(SCN)4]-.

(b) Draw a crystal field energy-level diagram for [Au(SCN)4]-, and predict the number of unpaired electrons.