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Cover Picture: Synthesis and Structural Studies of Rhenium( V ) Complexes Stabilized by a Monoanionic Cyclen Ligand (Eur. J. Inorg. Chem. 2/2004)
Author(s) -
Xavier Catarina,
Paulo António,
Domingos Angela,
Santos Isabel
Publication year - 2004
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Reports
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.200490004
Subject(s) - cyclen , chemistry , rhenium , deprotonation , ligand (biochemistry) , stereochemistry , octahedron , crystallography , crystal structure , inorganic chemistry , ion , organic chemistry , receptor , biochemistry
The cover picture shows the structure of the cation [ReO(cyclen‐H)I] + . This complex and the analogous [ReO(cyclen‐H)Cl] + are the first examples of d transition metal oxo complexes anchored by a monoanionic cyclen ligand. The deprotonation of cyclen can be accounted by the enhanced Lewis acidity of the d 2 rhenium center. Although the geometric contraints of cis ‐octahedral cyclen could impose the cis ‐ReO 2 unit, the resulting cis ‐dioxo complex, cis ‐[ReO 2 (cyclen)] + , is very reactive, being readily converted into [ReO(cyclen‐H)X] + . Details are discussed in the article by I. Santos et al. on p. 243 ff.