Tetranuclear thermodynamic properties

The structures of the trinuclear species Cr3(OH)45 + and the two tetranuclear species a- and /7-Cr4(OH)6< + have not been established. Linear as well as cyclic trimeric structures (structures 4a, 4b, and 5 in Fig. 1) have been considered (27, 37), as has another cyclic structure such as that shown in Fig. 10. However, the kinetic, thermodynamic, spectroscopic, and magnetic properties appear to provide no evidence to favor the one rather than the other (27). The number of possible... 

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