Description of experiment
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Needed compounds:
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catechol : C6H4 (OH)2
sulphuric acid : H2SO4
vanadyl sulfate : VOSO4.5H2O
Class:
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elem=C,V
coordination
Summary:
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Catechol forms a coordination complex with vanadyl.
Description:
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Add a solution of catechol (almost colorless) to an acidic solution of
vanadyl sulfate (solution is slightly acidified with sulphuric acid): The
liquid becomes grey, apparently the blue vanadyl-ions form a coordination
complex with catechol.