試題詳解

26. Consider the following octahedral complex structures, each involving ethylene diamine and two different, unidentate ligands X and Y. Which, if any, of the following pairs are optical isomers?
(A) 1 and 4
(B) 1 and 2
(C) 3 and 4
(D) 1 and 3
(E) None of the above.