Colour changes due to ligand exchange

Colour changes due to ligand exchange

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Caption: Colour changes due to ligand exchange. Samples of solutions containing various complex ions of nickel, showing the effect of ligand exchange on colour. At left (green) is a solution containing the hexaaquanickel(II) ion; six water molecules surrounding a nickel atom. In the next solution (pale blue), each complex ion has had two water molecules replaced by a single 1, 2-diaminoethane molecule. Right of centre (dark blue), a further two water molecules have been replaced. At right (purple), the complex now consists of three 1, 2- diaminoethane molecules and no water around each nickel atom.

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Keywords: chemical, chemistry, colour, colour change, colours, ligand exchang, ligand exchange, nickel complex, reaction

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