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Cover Picture Molecular Gyroscopes {Fe(CO)3} and {Fe(CO)2(NO)}+ Rotators Encased in Three-Spoke Stators; Facile Assembly by Alkene Metatheses (Angew. Chem. Int. Ed. 412004)

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Cover Picture
Takanori Shima, Frank Hampel, and J. A. Gladysz*
Three-fold alkene metatheses are used to access the family of molecular gyroscopes
shown in the cover picture. As described by J. A. Gladysz and co-workers in their
Communication on page 5537 ff. the gyroscopes consist of a phosphorus–iron–
phosphorus axis, an {Fe(CO)3} or {Fe(CO)2(NO)}þ “rotator”, and three (CH2)n
“spokes” that connect the phosphorus termini. These are believed to be the first
systems that rigorously duplicate the connectivity and symmetry of toy gyroscopes
(shown in the background).
In their Minireview on page 5446 ff. C. Nuckolls et al. report the self-assembly of
hexasubstituted benzene derivatives that is directed by intermolecular hydrogen
bonds between amide substituents.
Magnetic Resonance Imaging
Sir Peter Mansfield illustrates in his Nobel Lecture on page 5456 ff. the principles, the
experimental setup, and the practical use of magnetic resonance imaging methods in
Photomagnetic Effects
A cyanide bridged MoIVCuII6 complex undergoes photoinduced electron transfer to
give a high-spin MoVCuICuII5 species. The photomagnetic properties of these
compounds are described by V. Marvaud, C. Mathoni8re et al. in their
Communication on page 5468 ff.
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