Inorganic Chemistry, Vol.46, No.13, 5152-5154, 2007
Use of calix[4]arenes in the redox chemistry of lanthanides: The reduction of dinitrogen by a calix[4]arene-samarium complex
The synthesis and structural characterization of a samarium-dinitrogen complex supported by a calix[4]arene ligand in which the N-N bond distance has been stretched to 1.611(16) angstrom are described. The central mu(3)-eta(2):eta(2):eta(2)-hydrazido tetraanion formed is bonded to three Sm-III centers with an overall butterfly-type arrangement.