Tutton’s salt

Both the hepta- and hexahydrate give rise to the reddish-violet Tutton s salts, M2[V(H20)6]-(804)2 (M = NH4, K, Rb, or Cs), on heatment of an aqueous solution of the salt with the appropriate alkali metal sulfate. These salts have the schonite, K2Mg(S04)2-61120, structure. They are more stable than the simple sulfate, especially in the presence of excess... 

Tutton s salts with the general formula M M (H20)6(804)2 many iso-... 

Fig. 24 The variation of the g-values for a number of Cu(II) doped Tutton s salts, after [60].

Figure 6.4 Dynamic Jahn-Teller effect in Cu -doped Tutton s salt (data taken from Ref. 42). (a) Schematic plot of the part of the potential energy surface relevant at temperatures below 310 K. (b) Dependence of the experimental g tensor principal values on temperature (full circles) and fit by the Silver-Getz model (solid lines).

Recent work on deuterated pure copper Tutton s salt [43] and on Cu -(2,2 6, 6"-terpyridine)2(PF6)2 [44] demonstrated that the energy difference between the two vibronic levels may itself depend on temperature due to coopera-tivity of the Jahn-Teller dynamics. In the case of Tutton s salt this cooperativity is believed to be mediated by a hydrogen-bond network. 

NH4)2Fe(S04)2 6H2O, Tutton s salt, monoclinic, Z=2 the observed spectrum has been ... 

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