Vogler, Arnd and Kunkely, Horst
Photochemistry of [MCo₂(CO)₈] (M=Zn, Cd, Hg) induced by metal to metal charge transfer excitation.
Journal of Organometallic Chemistry 355 (1-3), pp. 1-6.
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The electronic absorption spectra of the complexes [(OC),Co-‘M”Co-‘(CO),]
with M = Zn, Cd, and Hg display an intense long-wavelength band which is
assigned to the allowed Σu+ -> Σg+ transition from a non-bonding σ to an
antibonding σ orbital of the Co-M-Co moiety. This transition is shifted to higher
energies and gains an increasing charge transfer (CT) contribution in changing M in
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