試題詳解

44. Which of the following statements about the complex ion Co(en)₂Cl₂⁺ (en = ethylenediamine, NH₂CH₂CH₂NH₂)is true?
(A) the geometric isomers of the complex ion have identical chemical properties
(B) the complex ion exhibits two geometric isomers (cis and trans) and two optical isomers
(C) because en is a strong field ligand (large A), the complex ion is paramagnetic
(D) the complex ion exhibits cis and trans geometric isomers, but no optical isomers
(E) the complex ion contains Co(l)