JEE Main 2022 · 24 Jun · Shift 1 · Chemistry Q87

ChemistryInteger+4 / -1Question 87 of 90

In the cobalt-carbonyl complex : $\mathrm{[Co_2(CO)_8]}$ , number of Co-Co bonds is "X" and terminal CO ligands is "Y". $X+Y=$ ______.

Your answer

Answer and worked solution

Official answer: 7

Structure (solid state). Two Co atoms joined by one Co-Co bond, bridged by 2 CO groups, with 3 terminal CO on each Co.

Count. $X=1$ , $Y=6$ , so $X+Y=7$ .

Answer: 7

JEE Main 2022 · 24 Jun · Shift 1, Chemistry question 87