Question
Question: In Ziesses salt C = C bond length is : \[\left\{ \begin{aligned} & C - Cbondlengthinethaneis1.54\o...
In Ziesses salt C = C bond length is :
& C - Cbondlengthinethaneis1.54\overset{\circ}{Α} \\ & C = Cbondlengthinetheneis1.34\overset{\circ}{Α} \\ & C \equiv Cbondlengthinethyneis1.20\overset{\circ}{Α} \end{aligned} \right\}$$A
1.37Å
B
1.19Å
C
1.87Å
D
1.34 Å
Answer
1.37Å
Explanation
Solution
Relative to free ethylene the C—C 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 metal s donation and a reciprocal metal to ligand p bonding.
