Re(CO)5Br reacts with the to give compound Y + Br-.
a. What is the most likely site of attack of this ion on Re(CO)5Br? (Hint: Consider the hardness (see Chapter 6 ) of the Lewis base.)
b. Using the following information, propose a structural formula of Y, and account for each of the following: Y obeys the 18-electron rule.
No gas is evolved in the reaction.
13C NMR indicates that there are five distinct magnetic environments for carbon in Y .
Addition of a solution of Ag+ to a solution of Y gives a white precipitate.
(See M. M. Singh, R. J. Angelici, Inorg. Chem. , 1984 , 23 , 2699.)
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