The first example of a mono-helical complex of 2,2′: 6′,2″:6″,2‴:6‴,2â—:6â—,2â—′-sexipyridine; preparation, crystal and molecular structure of bis(nitrato-O,O′)(2,2′: 6′,2″:6″,2‴:6‴,2â—:6â—,2â—′-sexipyridine)europium(III) nitrate
作者： Edwin C. Constable , Rohit Chotalia , Derek A. Tocher
DOI: 10.1039/C39920000771
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摘要: The hexadentate ligand 2,2′ : 6′,2″:6″,2‴:6‴,2â�—:6â�—,2â�—′-sexipyridine (spy) forms double-helical binuclear complexes with transition metals, but 1:1 lanthanides; the photoactive complex [Eu(spy)(NO3)2][NO3] is obtained from reaction of spy europium(III) nitrate and has been structurally characterised as a mono-helical ten-coordinate species helically twisted ligand.
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