Question

what it’s mean by:

1) binary halides of Mn(VII) have not been isolated.

2) no binary halides of Mn(VI) have been isolated

Answer 1

Binary halide refers to a compound of the form MX2 where M is the metal and X is the halide. Binary halide can be formed only by metals that are in +2 oxidation state.

1) Mn(VII) is in +7 oxidation state. Hence it can form halides that take the formula MnX7 where X is a halide ion. This is because the oxidation state of a halide is -1. Hence Mn(VII) cannot form binary halides and hence binary halides cannot be isolated.

2) Mn(VI) has an oxidation state of +6 and can form only MnX6 type of halides. Binary halides cannot be formed or isolated.