Reactions of dppf with labile technetium. and rhenium precursors such as [M
(N)CI4](-) and [M(NPh)Cl-3(PPh3)(2)] yield the monomeric mono-substituted [
M(N)Cl-2(dppf)] and [M(NPh)Cl-3(dppf)] complexes, where the diphosphinoferr
ocenyl fragment coordinates on the equatorial plane of a distorted square p
yramid or of a distorted octahedron, respectively. (C) 2001 Elsevier Scienc
e B.V. All rights reserved.