Cluster Anions S and

Vibrational fine structure was resolved for n=l-3 and 6 [88]. In particular, the observed frequencies allow the identification of both ring and chain isomers of 85 and 87 . It is of interest to note that the only wavenumber measured for the neutral 8e structure (570 32 cm ) is significantly higher than both the calculated and observed Raman wavenumbers of the D3d isomer of 8e and falls in a pronounced gap of the spectrum of this isomer. 

In polysulfide solutions there exist chainlike dianions with practically arbitrary chain lengths n. Berghof, 8ommerfeld, and Cederbaum have investigated the onset of stabihty in the 8 (n=2-8) series of dianions based on 8CF calculations with the DZPD basis set [89]. The isolated chainlike 8 isomers were found to exhibit twisted structures, and the onset of electronic stabihty (with respect to electron auto detachment) was predicted to occur at 71=7. Branched isomers were found to be electronically more stable than the 

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