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Issue 17, 2000
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The nature of the normal modes of [Mo2(CN)8]4−

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The 1(δ → δ*) resonance-Raman and infrared spectra of [NEt4]4[Mo2(13CN)8] have been determined and are compared with those previously reported for the natural-abundance isotopomer. The three totally symmetric resonance-enhanced Raman fundamentals of the 12C compound in the 300–415 cm−1 region shift to lower wavenumbers (as, of course, do the ν(CN) bands at ca. 2100 cm−1) and change in relative intensity upon 13C substitution. Normal-coordinate calculations on the two isotopomers of the [Mo2(CN)8]4− ion reveal that the three modes responsible for the resonance-enhanced Raman bands are strongly mixed and of ν(MoMo), ν(MoC), and λop(MoCN) parentage, and that their intensities roughly scale with the amount of ν(MoMo) character in the modes.

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Publication details

The article was received on 25 May 2000, accepted on 04 Jul 2000 and first published on 02 Aug 2000

Article type: Paper
DOI: 10.1039/B004186F
Citation: J. Chem. Soc., Dalton Trans., 2000,0, 2928-2932
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    The nature of the normal modes of [Mo2(CN)8]4−

    R. J. H. Clark, S. Firth, A. Sella, V. M. Miskowski and M. D. Hopkins, J. Chem. Soc., Dalton Trans., 2000, 0, 2928
    DOI: 10.1039/B004186F

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