Chemistry - Coordination Chemistry Question with Solution | TestHub
Consider these assignments of possible constitutional isomerism. Preserve each overall formula and allow inner/outer exchange, including crystallisation water where present.
(i) [Rh(NH₃)₄Cl₂]Br can have two alternative coordinated-halide compositions.
(ii) [Cr(H₂O)₅Br]Br₂·H₂O can have a hydrate isomer with three precipitable bromides per formula unit.
(iii) [Pd(NH₃)₄][PdBr₄] can have the coordination isomer [Pd(NH₃)₃Br][Pd(NH₃)Br₃].
Which statements are correct?
Options:
Answer:
Solution:
With two inner sites and total Cl₂Br, the allowed inner compositions are Cl₂ and ClBr. Only ONE alternative to the stated Cl₂ form exists, so (i) is false. In (ii), [Cr(H₂O)₆]Br₃ preserves the formula and has three free bromides. In (iii), both new Pd centres remain +2 and four-coordinate; the cation is +1 and anion −1, and NH₃/Br totals are preserved. Thus (ii),(iii) hold.
