The compound Cr(en)2(OH)2Cl has been prepared in several isomeric forms: Isomer A is optically inactive and undergoes no reaction with either AgNO3 or en. Isomer B is optically inactive and reacts with AgNO3 to form a white precipitate, but does not react with en. Isomer C is optically active and reacts both with en and AgNO3. Assuming the coordination number of chromium is 6, identify each of the three isomers by name and draw each of the structures. Hint: For the en ligand think about what angle the donor atoms form with the metal ion.

A coordination compound has the following composition (by mass %): 23.53% Co; 42.47% Cl, and 34.00% NH3. When 4.91 g of the compound is dissolved in 75.0 mL of deionized water, and the solution is reacted with an excess of AGNO; solution, it yields 5.60 g of AgCl precipitate. (a) Determine the empirical formula of the compound and write in the form of Co(NH;),Cl, (where x and 24. y are simple integers), and calculate its molar mass. (Assume the compound contains only one Co atom). (b) Deduce the number of chloride (Cl) as counter ions and as ligand, respectively. (c) Write the Werner's formula of the compound and give its systematic name. (Answers: (a) Co(NH3);C13; molar mass = 250.43 g/mol; (b) 2 Cl are counter ions and one is ligand; (c) [Co(NH3);CI]Cl2 = pentaammonechlorocobalt(III) chloride)

Which of the following can exhibit geometric isomersim?     [Zn(NH3)2Cl2] tetrahedral     [Pt(NH3)2Cl2]  square planar     All of these can exhibit geometric isomerism.     [Cu(NH3)5Cl]2+       [Cu(NH3)4]2+  square planar

Balance this equation and balanced reaction equation and the quantities included in the procedure to calculate the theoretical yield of K[Cr(C2O4)2(H2O)2]·2H2O.