Syntheses and structures of calcium and ytterbium bis(diphosphanylamido) complexes
摘要:
Bis(diphosphanylamido) complexes of calcium and ytterbium, [{(Ph2P)(2)N}M(THF)(3)] (M =Ca (1), Yb (2)), have been prepared by reaction of [K(THF)(n)N(PPh2)(2)] (n = 1.25, 1.5) and MI2. The single crystal X-ray structures of compounds 1 and 2 always show a eta(2)-coordination of the ligand via the nitrogen and one phosphorus atom. In solution a dynamic behavior of the ligand is observed, which is caused by the rapid exchange of the two different phosphorus atoms. (c) 2006 Elsevier B.V. All rights reserved.