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In Zeise's salt C=C bond length is:
Note: ⎪ ⎪ ⎪ ⎪⎪ ⎪ ⎪ ⎪CC bond length in ethane is 1.54 AC=C bond length in ethene is 1.34 ACC bond length in ethyne is 1.20 A⎪ ⎪ ⎪ ⎪⎪ ⎪ ⎪ ⎪


Correct Answer
A
1.37 A
Your Answer
B
1.19 A
Your Answer
C
1.87 A
Your Answer
D
1.34 A

Solution

The correct option is A 1.37 A
Relative to free ethylene the CC bond is lengthened (from 133.77 pm to 137.5 pm). The bonding scheme is analogous to that in carbon monoxide complexes in which there is a ligand to metal σ donation and a reciprocal metal to ligand π bonding. 

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