title: Ag[Fe(CO)5]2(+) : a bare silver complex with Fe(CO)5 as a ligand.
abstract: Attempts to prepare Fe(CO)5 (+) from Ag[Al(OR(F) )4 ] (R(F) =C(CF3 )3 ) and Fe(CO)5 in CH2 Cl2 yielded the first complex of a neutral metal carbonyl bound to a simple metal cation. The Ag[Fe(CO)5 ]2 (+) cation consists of two Fe(CO)5 molecules coordinating Ag(+) in an almost linear fashion. The ν(CO) modes are blue-shifted compared to Fe(CO)5 , with one band above 2143 cm(-1) indicating that back-bonding is heavily decreased in the Ag[Fe(CO)5 ]2 (+) cation.
authors.affiliation: Institut für Anorganische und Analytische Chemie, Freiburger Materialforschungszentrum (FMF), Albert-Ludwigs-Universität Freiburg, Albertstrasse 21, 79104 Freiburg im Breisgau (Germany); Centre of New Technologies, University of Warsaw, Żwirki i Wigury 93, 02-089 Warsaw (Poland). malin@cent.uw.edu.pl.
authors.forename: Przemysław J
authors.initials: PJ
authors.lastname: Malinowski
authors.forename: Ingo
authors.initials: I
authors.lastname: Krossing
keywords: carbonyl ligands; pentacarbonyliron; silver; weakly coordinating anions