Textbook Question
Which of the following complexes are chiral?
(a) Pt(en)Cl2
(b) cis-[Co(NH3)4Br2]+
(c) cis-[Cr(en)2(H2O)2]3+
(d) [Cr(C2O4)3]3-
24. Transition Metals and Coordination Compounds
Isomerism in Coordination Complexes
Multiple Choice
Write the formula for the coordination compound that is named as ammonium tetrachlorocuprate(II).
A
(NH4)[CuCl2]
B
(NH4)2[CuCl4]
C
(NH4)2[CuCl]
D
(NH4)[CuCl4]
E
(NH4)2[CuCl2]
Verified step by step guidance1
Identify the cation and anion in the coordination compound. In this case, the cation is ammonium, NH₄⁺, and the anion is tetrachlorocuprate(II), [CuCl₄]²⁻.
Determine the charge of the cation. Ammonium, NH₄⁺, has a charge of +1.
Determine the charge of the anion. The Roman numeral (II) indicates that copper has a +2 oxidation state. Since there are four chloride ions, each with a -1 charge, the overall charge of the anion [CuCl₄]²⁻ is -2.
Balance the charges between the cation and anion to ensure the compound is neutral. Since the anion has a -2 charge, you need two ammonium ions, each with a +1 charge, to balance it.
Write the formula for the coordination compound by placing the cation first, followed by the anion. The correct formula is (NH₄)₂[CuCl₄].
Related Videos
Related Practice
