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Semi‐Rigid Bis‐Phosphane Ligands for Metallamacrocycle Formation
Author(s) -
Armstrong Susan K.,
Cross Ronald J.,
Farrugia Louis J.,
Nichols David A.,
Perry Alexis
Publication year - 2002
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/1099-0682(20021)2002:1<141::aid-ejic141>3.0.co;2-w
Subject(s) - chemistry , hydroformylation , catalysis , stereochemistry , platinum , ligand (biochemistry) , bridging ligand , metal , bridging (networking) , trans effect , crystal structure , crystallography , polymer chemistry , rhodium , organic chemistry , biochemistry , receptor , computer network , computer science
Efficient syntheses are described for the new bridging bis‐phosphanes DPPN ( 4 ) and DPEN ( 5 ) built around the restricted rigidity of a 2,7‐dialkoxynaphthalene backbone. These show marked preference for bridging pairs of metal atoms (Pt II , Mo 0 ) to form metallamacrocycles or oligomers. Single‐crystal X‐ray structure determinations of four dimeric complexes with Pt II and Mo 0 are reported. The dimeric platinum complexes can be obtained as the kinetically favoured trans , trans products, which isomerise to the cis , cis forms in the presence of free ligand. cis , cis ‐[Pt 2 Cl 4 (DPEN) 2 ] ( 12) shows marked hydroformylation catalytic activity.