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Cover Picture (Angew. Chem. Int. Ed. Engl. 7/1997)
Publication year - 1997
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Reports
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.199706611
Subject(s) - samarium , cover (algebra) , chemistry , crystallography , polymer science , organic chemistry , engineering , mechanical engineering
The cover picture shows the crystal structure of [U(C 5 Me 5 ) 3 ], the first 5f‐element compound of this type. Previously, formation of tris(pentamethylcyclopentadienyl) complexes was limited to samarium since the only available syntheses required the special chemistry of samarium( II ) precursors. Now it is possible to make these molecules from trivalent metal hydrides and tetramethylfulvalene. This new synthetic method should open up the area of [M(C 5 Me 5 ) 3 ] chemistry so that the unusual reactivity of these sterically crowded molecules can be explored. The structural diagram (generated by Michael Greci with the program Spartan 4.1.1 from Wavefunction) is superimposed on a picture of a crystal of the samarium compound [Sm(C 5 Me 5 ) 3 ], which was taken inside a specially modified Vacuum/Atmospheres glovebox by using a Panasonic videomicroscope, a McBain fiber‐optic light pipe, and a Minolta Snappy video capture device. More details on the chemistry of [U(C 5 Me 5 ) 3 ] are reported by W. J. Evans et al. on pages 774 ff.