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Li Ding Matthias Wagner Michael Bolte 《Acta Crystallographica. Section C, Structural Chemistry》2001,57(2):162-164
Two pseudopolymorphs of [2,5-bis(2-pyridyl)pyrazine]ferrocenyl(methyl)boron hexafluorophosphate have been determined at 173 K, namely the diethyl ether hemisolvate, [Fe(C5H5)(C20H17BN4)]PF6·0.5C4H10O, (I), which forms red crystals with Z′ = 1, and the acetonitrile hemisolvate, [Fe(C5H5)(C20H17BN4)]PF6·0.5CH3CN, (II), which yields green–brown crystals with Z′ = 2. Despite the different crystal packing, the cations in (I) and (II) are similar. The 2,5-bis(2-pyridyl)pyrazine moiety is almost planar and displays bending along its long axis compared with free 2,5-bis(2-pyridyl)pyrazine. It is remarkable that both crystals were obtained from the same acetonitrile/diethyl ether solution. 相似文献
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