Charge of Cobalt in coordinate compound
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Charge of Cobalt in coordinate compound
Can someone please explane why Co's charge is +3 in [Co(NH3)6]3+?
I thought NH3 has +1 charge each which makes +6, so Co has to be -3 to make 3+ charge.
Can someone please explain where I got it wrong?
I thought NH3 has +1 charge each which makes +6, so Co has to be -3 to make 3+ charge.
Can someone please explain where I got it wrong?
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Re: Charge of Cobalt in coordinate compound
I think NH3 is neutral, with a formal charge of zero. So Co has to have a +3 charge.
Re: Charge of Cobalt in coordinate compound
Aida Fraser 2I wrote:I think NH3 is neutral, with a formal charge of zero. So Co has to have a +3 charge.
omg you're right. I think I got confused with NH4+. Thank you!
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Re: Charge of Cobalt in coordinate compound
NH3 is neutral so Cobalt's charge is the same as the overall charge
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Re: Charge of Cobalt in coordinate compound
Hello,
NH3 is neutral! If you draw out the lewis structure of it you will see that nitrogen has formed single bonds with all three hydrogens, and has a lone pair, which gives all the atoms involved a formal charge of 0. With that in mind, all the ligands that have formed coordinate covalent bonds with the Cobalt are neutral, yet the complex overall has a charge of 3+, thus the cobalt ion must have the oxidation state of +3
NH3 is neutral! If you draw out the lewis structure of it you will see that nitrogen has formed single bonds with all three hydrogens, and has a lone pair, which gives all the atoms involved a formal charge of 0. With that in mind, all the ligands that have formed coordinate covalent bonds with the Cobalt are neutral, yet the complex overall has a charge of 3+, thus the cobalt ion must have the oxidation state of +3
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Re: Charge of Cobalt in coordinate compound
NH3 is neutral in this compound and if you need to have the complete charge on the molecule of +3 the only way it can happen is if the Cobalt has a +3 oxidation number.
Re: Charge of Cobalt in coordinate compound
Since the overall charge is +3 and it's attached to a neutral compound, the charge +3 comes from colbat
Re: Charge of Cobalt in coordinate compound
Hi,
I think that the 6 ammine ligands are not charged. And since the overall oxidation state of the complex is 3+, the oxidation state of Cobalt, which contributes to all electron charges, is also 3+.
Please note that ligands could donate both of the electrons to form a covalent bond to the central atom that is counted into the coordination number.
Hope this could address your concerns.
I think that the 6 ammine ligands are not charged. And since the overall oxidation state of the complex is 3+, the oxidation state of Cobalt, which contributes to all electron charges, is also 3+.
Please note that ligands could donate both of the electrons to form a covalent bond to the central atom that is counted into the coordination number.
Hope this could address your concerns.
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Re: Charge of Cobalt in coordinate compound
Since the overall charge is 3+ and NH3 is neutral, the charge must be coming from the cobalt, making cobalt have a charge of +3
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Re: Charge of Cobalt in coordinate compound
we find the charge based on setting the net charge of the coord. compound to zero and do algebra.
Re: Charge of Cobalt in coordinate compound
NH3 is a neutral molecule and thus the total charge of the coordination compound is plus 3. This means the TM must have a plus three charge to account for this.
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Re: Charge of Cobalt in coordinate compound
Where you went wrong was mistaking NH4 for NH3. This charge doesn't even need to be memorized and can be calculated. Since hydrogen is in period 1, it has a charge of +1. Since nitrogen is in period 15, the charge is -3. Depending on the mount of hydrogen and nitrogen, you can calculate its charge.
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