I Co CO 6II Co CO 5 NH 3III Co CO 4 N H 32IV Co CO 3 NH 33V Co CO 2 NH 34 VI Co CO NH 35Which statement is correct for these compounds-A- Order of Co - C bond length in complexes is I - II - III - IV - V - V IB- Order of Co-C bond length in complexes is V I - V - IV - III - II - IC- Order of Co-C bond strength in complexes is I - II - III - IV - V - V ID- Order of C - O bond length in complexes is I - II - III - IV - V - V I

The correct option is A Order of Co – C bond length in complexes is I gt; II gt; III gt; IV gt; V gt; VIAs the number of π acceptor ligands (CO) ...

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Byju's Answer

Standard XII

Chemistry

Types of Complexes Based on Ligands

I Co CO 6II C...

Question

(I) $C o (C O)_{6}$
(II) $C o (C O)_{5} N H_{3}$
(III) $C o (C O)_{4} (N H_{3})_{2}$
(IV) $C o (C O)_{3} (N H_{3})_{3}$
(V) $C o (C O)_{2} (N H_{3})_{4}$
(VI) $C o (C O) (N H_{3})_{5}$
Which statement is correct for these compounds?

Order of

C o - C

bond length in complexes is

I > I I > I I I > I V > V > V I

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Order of

C o - C

bond length in complexes is

V I > V > I V > I I I > I I > I

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Order of

C o - C

bond strength in complexes is

I = I I = I I I = I V = V = V I

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Order of

C - O

bond length in complexes is

I = I I = I I I = I V = V = V I

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Solution

The correct option is A Order of $C o - C$ bond length in complexes is $I > I I > I I I > I V > V > V I$
As the number of $π$ acceptor ligands $(C O)$ increses, synergic bonding per $M - C O$ bond decreases. Hence, bond length will increase.
Since the $M - C O$ bonds have different strength and accordingly different bond length hence bondlength of $C - O$ are also different.

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(I) Co(CO)6 (II) Co(CO)5NH3 (III) Co(CO)4(NH3)2 (IV) Co(CO)3(NH3)3 (V) Co(CO)2(NH3)4 (VI) Co(CO)(NH3)5 Which statement is correct for these compounds?

(I) $C o (C O)_{6}$
(II) $C o (C O)_{5} N H_{3}$
(III) $C o (C O)_{4} (N H_{3})_{2}$
(IV) $C o (C O)_{3} (N H_{3})_{3}$
(V) $C o (C O)_{2} (N H_{3})_{4}$
(VI) $C o (C O) (N H_{3})_{5}$
Which statement is correct for these compounds?