The energy electronic transition in the dye polymethine ion

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Predict the wavelength (in nm) of the lowest energy electronic transition in the dye polymethine ion. Assume all C-C and C-N bond lengths are the same and are 1.4 A (0.14 nm) and that N+1 contributes 1 π-electron and N contributes 2 π-electrons.
(CH3)2N+ = CH - CH = CH - CH = CH - N(CH3)2

Reference no: EM13524937

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