Herbert Schumann, Jochen Gottfriedsen and Jörg Demtschuk
Chem. Commun., 1999, 2091-2092
DOI:
10.1039/A906654C,
Paper
Calcium and strontium diiodide react with 2,5-di-tert-butylpyrrolylsodium in THF yielding [M(pyr*)2(THF)] (M = Ca, Sr; pyr* = NC4H2But2-2,5) for which NMR spectra and the X-ray structures confirm the η5-bonding character of the ligands.