The Naked Scientists

The Naked Scientists Forum

Author Topic: How is Hydrogen Cyanide bonded?  (Read 4610 times)

Offline jeffreyquach

  • First timers
  • *
  • Posts: 2
    • View Profile
How is Hydrogen Cyanide bonded?
« on: 17/03/2014 07:24:29 »
Is it bonded ionically or covalently?

Its name 'Hydrogen Cyanide' follows the naming conventions of an ionic compound.
Cyanide is a polyatomic ion of CN-. This would allow it form an ionic bond with a hydrogen cation.

However, they are both non-metals, thus cannot be bonded ionically. If it is bonded covalently, why is it named in such a way?

Thankyou :)


 

Offline chiralSPO

  • Global Moderator
  • Neilep Level Member
  • *****
  • Posts: 1880
  • Thanked: 145 times
    • View Profile
Re: How is Hydrogen Cyanide bonded?
« Reply #1 on: 18/03/2014 18:14:07 »
The C and N are bound covalently.

The bond between H and C is also covalent, but it is easily ionized. Hydrogen cyanide is a weak acid, like hydrogen sulfide and hydrogen fluoride. All exist as covalently bound molecules, but they will dissociate (to some extent) into ions when dissolved in water.

Even though C and H have very similar electronegativities, that is a very simplistic view. The CN unit together is very electronegative.
 

Offline Bored chemist

  • Neilep Level Member
  • ******
  • Posts: 8676
  • Thanked: 42 times
    • View Profile
Re: How is Hydrogen Cyanide bonded?
« Reply #2 on: 18/03/2014 20:41:44 »
If it is bonded covalently, why is it named in such a way?

Thankyou :)

History.
It was named before the bonding was known.
However, it's fair to say that quite a lot of compounds have similar names; the sulphide, chloride selenide iodide and so on.
 

The Naked Scientists Forum

Re: How is Hydrogen Cyanide bonded?
« Reply #2 on: 18/03/2014 20:41:44 »

 

SMF 2.0.10 | SMF © 2015, Simple Machines
SMFAds for Free Forums