A molecular carousel, that is the appearance of the structure of the title compound [1⋅2 py] (see picture), the first complex of a new structure type prepared by a highly selective condensation reaction from the equally new complex [Fe(C5H4GaMe2)2]. The first gallium bridged [m.m]ferrocenophane [{Fe(C5H4)2}2{GaMe(C5H5N)} 2] is formed as an intermediate; this compound can also be prepared in a planned synthesis and can be converted into [1⋅2 py] by warming. The complex [1⋅2 py] as well as [1⋅2 Et2O] and [1⋅2 DMSO], which were formed by donor exchange, offers various interesting properties, for example, [1⋅2 DMSO] can be reversibly oxidized to the mono-, di-, and trication.
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Jutzi et al. (2001) studied this question.