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(Diene)rhodium and ‐iridium Complexes of Pyridinophane Ligands
Author(s) -
Sciarone Timo,
Hoogboom Johan,
Schlebos Paul P. J.,
Budzelaar Peter H. M.,
de Gelder René,
Smits Jan M. M.,
Gal Anton W.
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(20022)2002:2<457::aid-ejic457>3.0.co;2-p
Subject(s) - chemistry , norbornadiene , rhodium , diene , iridium , protonation , pyridine , cyclooctadiene , ligand (biochemistry) , amine gas treating , 1,5 cyclooctadiene , photochemistry , medicinal chemistry , stereochemistry , organic chemistry , catalysis , receptor , ion , biochemistry , natural rubber
(Diene)rhodium(I) and ‐iridium(I) derivatives of the pyridinophane ligand L 4 and the analogous macrocycle L 6 have been prepared and characterized [diene = cyclooctadiene (COD) or norbornadiene (NBD)]. In all of the complexes, the ligand is coordinated in a κ 3 ‐(amine)(pyridine) 2 fashion; a dynamic process, believed to be concerted, exchanges free and coordinated amine groups. [L 4 Ir(COD)] + can be protonated at the amine nitrogen atom. It reacts with H 2 O 2 , but only in the presence of acid, to give an oxocyclooctenyl complex, formally a 4‐e − oxidation product. X‐ray structures of [L 4 Rh(COD)]PF 6 , [L 6 Rh(COD)]PF 6 , [L 6 Rh(NBD)]PF 6 , [(L 4 H)Ir(COD)](BF 4 ) 2 , and [L 4 Ir(C 8 H 11 O)](PF 6 ) 2 are presented.