Question

Complex that obeys the 18-electron rule would be
2-
A) [(n5-C5H5) Fe(CO(2]
B) [(n5 - C5H5) Mo(CO)2]2
c) (Ir(CO)2 Br2]2
D) Os(CO)(=CPh)(PPh3)2 CL​

Answer 1

Answer:

V atom in V(CO)

6

contains 17 valence electrons. 12 electrons are from 6 CO ligands and 7 electrons are from V. Hence, the complex does not obey 18 - electron rule.

Cr(CO)

6

,Fe(CO)

5

and Mn

2

(CO)

10

all contains 18 valence electrons on the central metal atom. Hence, they follow 18 electron rule.

Answer 2

Answer:

All the compounds contain less than 17 electrons in their outermost shell and thus all of them obey the 18 electron rule.

Explanation:

There are compounds that obey the 18 electron rule and are called inert since they have a fully filled outermost shell of electrons.

The rule suggests that the valence orbitals of the metal should be filled by covalent bonding that occurs between the metal and the ligands.

The metal ions that consist of  large ionic chemistry may not obey the 18 electron rule.

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