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    Why is VO2 + coloured with no d electrons?
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    (Original post by mystreet091234)
    Why is VO2 + coloured with no d electrons?
    There is more than one mechanism of colour production.After all, manganate(VII) has no 'd' electrons either!

    There is a process known as charge transfer between the metal ion and the ligand which also gives rise to (often intense) colours.

    Colour also happens with very conjugated organic systems (chromophores). Certainly no 'd' electrons there!
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    (Original post by charco)
    There is more than one mechanism of colour production.After all, manganate(VII) has no 'd' electrons either!

    There is a process known as charge transfer between the metal ion and the ligand which also gives rise to (often intense) colours.

    Colour also happens with very conjugated organic systems (chromophores). Certainly no 'd' electrons there!
    Thanks again!
 
 
 
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