Inorganic Chemistry

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25 Feb 2008 18:35:14 IST
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why is KMnO4 coloured despite the absence of any unpaired electrons in d orbital??
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why is KMnO4 coloured despite the absence of any unpaired electrons in d orbital??



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VARSHA KRISHNAN's Avatar

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25 Feb 2008 18:40:19 IST
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 due to charge transfer of electrons from oxygen to Mn+7 which gives colour
 
do not mistake d reason as d-d transition as mn has d0 config.

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25 Feb 2008 18:43:19 IST
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What is this charge transfer thing and charge transfer from where to where???
 
varsha valli g.'s Avatar

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25 Feb 2008 20:44:30 IST
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its bcoz of back donation from oxygen to Mn.
!!!!!!!!!!!!!!!!!!!
Sangeeta's Avatar

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25 Feb 2008 23:32:50 IST
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KMnO4 is coloured due to charge transfer from O to Mn thus reducing the oxidation state of Mn from +7 to +6....  temporarily

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9 Sep 2011 22:28:10 IST
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 thank you for replying...

 


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9 Sep 2011 22:29:38 IST
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ananya bhattacharjee's Avatar

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9 Sep 2011 23:10:23 IST
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the central atom is linked by a ligand thru cordinate bond and can accept lone pair of electrons



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