MY CART (5)

Use Coupon: CART20 and get 20% off on all online Study Material

ITEM
DETAILS
MRP
DISCOUNT
FINAL PRICE
Total Price: R

There are no items in this cart.
Continue Shopping
Menu
sumit kumar Grade: 12
        

Why are BeH2 and MgH2 polymeric in structure? Plz explain. Plz show the structure also.

7 years ago

Answers : (1)

askiitian expert akshay singh
8 Points
										

hi,


. The hydrides of beryllium and magnesium are covalent and polymeric (BeH2)n. has a chain structure containing chains with hydrogen bridges between beryllium atoms

Each beryllium atom is bonded to two hydrogen atoms and each hydrogen atom to two beryllium atoms. Now, beryllium has only two valence electrons and hydrogen only one, it is apparent that there are not sufficient electrons to form so many electron pair bonds. The monomeric BeH2, if formed with normal bonds, would have only four electrons in the valence shell of the beryllium atom and would be electron deficient and unstable. It polymerizes to remedy the electron deficiency. The bonds formed cannot be explained by the classical theories of bonding. They are “banana shaped” molecular orbitals holding three atoms Be ---- H ---- Be together and are called 3 centred – 2- electron (3c – 2e) bonds. It is an example of a cluster compound.


 

7 years ago
Think You Can Provide A Better Answer ?
Answer & Earn Cool Goodies
  • Complete JEE Main/Advanced Course and Test Series
  • OFFERED PRICE: R 15,000
  • View Details

Ask Experts

Have any Question? Ask Experts

Post Question

 
 
Answer ‘n’ Earn
Attractive Gift
Vouchers
To Win!!! Click Here for details