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Bimetallic Complexes from Amphoteric Group 13/15 Ligands: Syntheses and X‐ray Crystal Structures
Author(s) -
Thomas Florian,
Schulz Stephan,
Nieger Martin,
Nättinen Kalle
Publication year - 2002
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/1521-3765(20020415)8:8<1915::aid-chem1915>3.0.co;2-z
Subject(s) - bimetallic strip , transition metal , chemistry , crystallography , pyridine , crystal structure , metal , monomer , group (periodic table) , stereochemistry , medicinal chemistry , catalysis , organic chemistry , polymer
Bimetallic, pentel‐bridged complexes of the type [(dmap)Me 2 M−E(SiMe 3 ) 2 −M′(CO) n ] (M=Al, Ga; E=P, As, Sb; M′=Cr, Fe, Ni; DMAP=4‐(dimethylamino)pyridine) are formed by reactions of DMAP‐coordinated monomeric Group 13/15 compounds [(dmap)Me 2 M−E(SiMe 3 ) 2 ] with the transition metal complexes [(Me 3 N)Cr(CO) 5 ], [Fe 3 (CO) 12 ], and [Ni(CO) 4 ]. For the first time, this reaction offers a general pathway to compounds containing a Group 13 metal and a transition metal bridged by a pentel atom. Complexes prepared in this way were characterized by IR and multinuclear NMR spectroscopy and by single‐crystal X‐ray structure analysis. Their electronic and structural properties are discussed in detail. The Group 13/15 ligands are very weak π acceptors, which is likely to be due to the electropositive Group 13 metal, and the complexes feature comparatively long pentel–transition metal bonds. In addition, the synthesis and structural characterization of the parent DMAP‐coordinated gallanes [(dmap)Me 2 Ga−E(SiMe 3 ) 2 ] (E=P, As) are reported.