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  • The correct order of catenation is:  Option: 1 C > Sn > Si  Ge Option: 2 

The correct order of catenation is: 


Option: 1 C > Sn > Si \approx Ge
Option: 2 C > Si > Ge \approx Sn
Option: 3 Si > Sn > C > Ge
Option: 4 Ge > Sn > Si > C

Answers (1)

best_answer

Catenation/ Self Linkage -

Property of elements to form long chains or rings by self linking of their own atoms through covalent bonds. In the carbon family, it decreases down the group. Only carbon atom form double or triple bong involving p^{\pi } -p^{\pi }multiple bond with itself.

The homo atomic bond energies are as follows :

(i) C-C = 83 kcal / mol

(ii) Si - Si = 54 kcal / mol

(iii) Ge - Ge = 40 kcal / mol

(iv) Sn - Sn = 37 kcal / mol

* Very large difference exists between the bond energies of (C-C) & (Si-Si)

but negligible difference is there for (Ge - Ge ) & (Sn-Sn).

Thus, the correct order is:

C > Si > Ge \approx Sn

Therefore, option (2) is correct.

Posted by

Ritika Jonwal

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