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

Explanation:

V atom in V(CO) 6contains 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

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