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Chemistry Forums for Students => Undergraduate General Chemistry Forum => Topic started by: Bias Binte Kamal on November 02, 2024, 03:59:05 AM

Title: CoCl5 3- hybridization and shape
Post by: Bias Binte Kamal on November 02, 2024, 03:59:05 AM

What's the hybridization and shape of CoCl5 3- ion? I thought it's sp3d3 but the book says it's tetrahedral. Could someone help?

Title: Re: CoCl5 3- hybridization and shape
Post by: Bias Binte Kamal on November 03, 2024, 09:11:37 AM

Anyone?

Title: Re: CoCl5 3- hybridization and shape
Post by: Borek on November 03, 2024, 02:58:05 PM

sp³d³ is very crowded (which means high energy) and rather rare, whenever possible molecules will prefer more loose arrangements of atoms (typically much lower energy, as distances between atoms are higher and the energy is lower).

That's without even trying to analyze orbitals involved, there is probably more to that.

Title: Re: CoCl5 3- hybridization and shape
Post by: Bias Binte Kamal on November 04, 2024, 04:24:42 AM

Have been looking for it everywhere just can't find anywhere. Anyways, thanks.

Title: Re: CoCl5 3- hybridization and shape
Post by: kabudiba2 on December 03, 2024, 03:59:09 AM

Not sure what this question is trying to test, but if the book says tetrahedral (which is correct for Cs3CoCl5, but I don’t know how you are supposed to know that without looking it up), can you figure it the hybridization out from there?

Title: Re: CoCl5 3- hybridization and shape
Post by: mjc123 on December 03, 2024, 10:49:56 AM

The crystal structure contains CoCl₄ tetrahedra and isolated Cl^- ions. There is no CoCl₅^3- ion.
https://legacy.materialsproject.org/materials/mp-1105622/