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Dendritic Systems Based on Dinuclear Ruthenium or Rhodium Units Generating Peripheral Catalytic Sites
Author(s) -
Chérioux Frédéric,
Thomas Christophe M.,
Therrien Bruno,
SüssFink Georg
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(20021004)8:19<4377::aid-chem4377>3.0.co;2-g
Subject(s) - chemistry , carbonylation , ruthenium , rhodium , phosphine , stereochemistry , medicinal chemistry , catalysis , ligand (biochemistry) , crystal structure , cationic polymerization , polymer chemistry , carbon monoxide , crystallography , organic chemistry , receptor , biochemistry
A series of dendritic cations 1 – 4 containing Ru 2 S 3 or Rh 2 S 3 units, either in the core or in the dendrons, has been synthesized and characterized. The X‐ray crystal structure analysis of 2 ‐Cl shows a trigonal bipyramidal Rh 2 S 3 core with propeller‐like para ‐hydroxyphenyl substituents at the sulfur atoms. Reaction of the peripheral OH groups with diphenylphosphino benzoic acid results in the formation of phosphine‐functionalized dendritic cations 5 – 8 . The ruthenium‐containing cation 5 , with three PPh 2 functions at the periphery, acts as ligand for rhodium( I ) and enhances significantly the catalytic activity of [{Rh(CO) 2 Cl} 2 ] for the carbonylation of methanol.