Reaction of Na 2 Mo 6 Cl 8 (OMe) 6 with CpFeC 5 H 4 CO 2 H produces the new cluster Na 2 Mo 6 Cl 8 (O 2 CC 5 H 4 FeCp) 6 ·HOCH 3, which consists of a novel one-dimensional chain from the interactions of the Na + ions with the carboxylate ligands of adjacent clusters. Coordination of the Na + cations to the carboxylate ligands is reflected in the vibrational spectroscopy of the sodium salt of [Mo 6 Cl 8 (O 2 CC 5 H 4 FeCp) 6 ] 2 - . Both the [Mo 6 Cl 8 ] 4+ and ferrocenecarboxylate groups are redox active. Voltammetry of the sodium salt of the cluster in DMSO reveals that the ferroceniumcarboxylate ligands dissociate with a rate constant of k = 0.6 s - 1 . Crystallographic data for Na 2 Mo 6 Cl 8 (O 2 CC 5 H 4 FeCp) 6 ·CH 3 OH: monoclinic space group, P 2 1 / c (No. 14), a = 13.175(3) Å, b = 25.148(8) Å, c = 11.264(2) Å, β = 92.10(2)°, V = 3729(1) Å 3, Z = 2.
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Prokopuk et al. (1997) studied this question.