In:
European Journal of Inorganic Chemistry, Wiley, Vol. 2011, No. 27 ( 2011-09), p. 4256-4261
Abstract:
The synthesis, characterization, and coordination chemistry of a series of mono‐, di‐, and trinuclear homo‐/heterometallic complexes with the dinucleating ligand, N , N ′‐bis[(2‐diphenyl‐phosphanyl)phenyl]formamidine (pnnp) 1 are reported. Treatment of (pnnp)PdMe ( 1 ) with NiCl 2 (dme) forms the heterobimetallic (pnnp)PdMe(μ‐Cl)NiCl ( 3 ) complex, whereas reaction of 1 with Cu(CH 3 CN) 4 + PF 6 – yields the Pd ··· Cu ··· Pd heterometallic trinuclear complex (pnnp)Pd(Me)CuPd(Me)(pnnp) · PF 6 ( 8 ). The reaction of pnnp with NiCl 2 (dme) (dme = 1,2‐dimethoxyethane) produces the Ni dimer [(pnnp)NiCl(μ‐Cl)] 2 ( 5 ) or the dinuclear (pnnp)NiCl(μ‐X)NiCl (X = Cl or OH) ( 4 ) complexes, depending upon the stoichiometry. The reaction of pnnp with Co II or Fe II ions leads to the monometallic complexes (pnnp)CoCl 2 ( 6 ) or (pnnp)FeCl 2 ( 7 ), respectively. The dinuclear (pnnp)PdMe(μ‐Cl)NiCl ( 3 ) and (pnnp)NiCl(μ‐X)NiCl (X = Cl or OH) ( 4 ) complexes adopt A‐frame structures with two square‐planar d 8 metal complexes hinged by the bridging ligand; the angles between the square planes correlate to the covalent radii, in which the smaller homo‐bimetallic Ni complex adopts a more coplanar arrangement of the two Ni square planes. The heterometallic trinuclear complex (pnnp)Pd(Me)CuPd(Me)(pnnp) · PF 6 ( 8 ) adopts an unusual structure around the Cu center, suggestive of a weak d 8 –d 10 interaction between the Pd and Cu atoms. All complexes have been characterized by NMR spectroscopy, elemental analysis, and X‐ray crystallography, and their structural diversity is discussed.
Type of Medium:
Online Resource
ISSN:
1434-1948
,
1099-0682
DOI:
10.1002/ejic.v2011.27
DOI:
10.1002/ejic.201100492
Language:
English
Publisher:
Wiley
Publication Date:
2011
detail.hit.zdb_id:
1475009-0
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