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Standard IX

Chemistry

Molecules and Atomicity

Consider the ...

Question

Consider the following carbonyl complex compounds.

(i) $M o (C O)_{x}$ (ii) $H_{y} [C r (C O)_{5}]$ (iii) $R u_{3} (C O)_{z}$

Then calculate value of $| z + y - x |$ .

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Solution

The carbonyls in general obey the effective atomic number rule and their effective atomic number = atomic number of next noble gas

(i) $M o (C O)_{x} \Rightarrow$ EAN of Molybdenum is '54'

$42 + 2 x = 54$

$x = 6$

(ii) $H_{y} [C r (C O)_{5}] \Rightarrow$ EAN of Chromium is '36'

$24 + (2 \times 5) + y = 36$

$y = 2$

(iii) $R u_{3} (C O)_{z} \Rightarrow$ EAN of each Ruthenium is '54'

$44 + 2$ (from other Ru-atoms) $+ 2 z_{1} = 54$

$z_{1} = 4$

$z = 3 z_{1} = 12$

Then $z + y - x = 12 + 2 - 6 = 8$

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Consider the following carbonyl complex compounds. (i) Mo(CO)x (ii) Hy[Cr(CO)5] (iii) Ru3(CO)z Then calculate value of |z+y–x|.

Consider the following carbonyl complex compounds.

(i) $M o (C O)_{x}$ (ii) $H_{y} [C r (C O)_{5}]$ (iii) $R u_{3} (C O)_{z}$

Then calculate value of $| z + y - x |$ .