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Chemistry Forums for Students => High School Chemistry Forum => Topic started by: xstrae on August 23, 2006, 01:01:29 PM

Title: Hybridisation in Fe(CN)2
Post by: xstrae on August 23, 2006, 01:01:29 PM

Hi,
How do you find the hybridisation in Fe(CN)2? Can someone please explain?

Title: Re: Hybridisation in Fe(CN)2
Post by: jennielynn_1980 on August 23, 2006, 02:08:08 PM

Try writing out the electron configuration of the elements or making a Lewis dot diagram.

I don't know if that would help but that would be where I would start.  Then you can look at see where it would be most likely to find a hybridization.

Title: Re: Hybridisation in Fe(CN)2
Post by: xstrae on August 24, 2006, 12:29:11 PM

yup tried all that. is it d²sp³?

Title: Re: Hybridisation in Fe(CN)2
Post by: Mitch on August 24, 2006, 04:35:02 PM

Just treat it as an ionic salt. Fe2+ and CN-

Title: Re: Hybridisation in Fe(CN)2
Post by: jennielynn_1980 on August 24, 2006, 06:16:13 PM

Quote from: konichiwa2x on August 24, 2006, 12:29:11 PM

yup tried all that. is it d²sp³?

which element is this the configuration for?

Title: Re: Hybridisation in Fe(CN)2
Post by: Mitch on August 24, 2006, 06:19:48 PM

The two competing bonding theories are VESPR and MO. Hybridization is VESPR theory and once VESPR needs d-orbitals to explain main group element bonding its far better and more accurate to use MO theory. Thus, I don't know the answer to your question jennielynn, since I will avoid d-orbital hybridization like the plague; especially, when MO theory is much more satisfying in those cases.

Title: Re: Hybridisation in Fe(CN)2
Post by: xstrae on August 24, 2006, 08:48:28 PM

Quote

which element is this the configuration for?

Fe but I am not sure if it is correct. As Mitch suggested I treater it as an ionic bond.

Title: Re: Hybridisation in Fe(CN)2
Post by: AWK on August 25, 2006, 08:18:12 AM

I think Fe(CN)2 is covalent, not ionic.

Title: Re: Hybridisation in Fe(CN)2
Post by: xstrae on August 26, 2006, 04:10:50 AM

Quote

I think Fe(CN)2 is covalent, not ionic

of course, but its easier to determine the hybridisation if you consider it to be ionic.