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Synthesis and Characterization of Chiral Bis(aminato)iridate(I) and Aminato‐Bridged Iridium(I) Complexes
Author(s) -
Dorta Romano,
Togni Antonio
Publication year - 2000
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/(sici)1522-2675(20000119)83:1<119::aid-hlca119>3.0.co;2-q
Subject(s) - chemistry , diphenylphosphine , hydroamination , iridium , protonolysis , binap , medicinal chemistry , aniline , ferrocene , catalysis , lithium (medication) , cationic polymerization , stereochemistry , phosphine , polymer chemistry , enantioselective synthesis , organic chemistry , medicine , electrode , endocrinology , electrochemistry
The two dinuclear Ir I complexes [Ir 2 ( μ ‐Cl) 2 {( R )‐( S )‐PPF‐PPh 2 } 2 ] ( 1 ; ( R )‐( S )‐PPF‐PPh 2 =( S )‐1‐(diphenylphosphino)‐2‐[( R )‐1‐(diphenylphosphino)ethyl]ferrocene and [Ir 2 (μ‐Cl) 2 {( R )‐binap} 2 ] ( 3 ; ( R )‐binap=( R )‐[1,1′‐binaphthalene]‐2,2′‐diylbis[diphenylphosphine]) smoothly react with 4 equiv. of the lithium salt of aniline to afford the new bis(anilido)iridate(I) (=bis(benzenaminato)iridate(1‐)) complexes Li[Ir(NHPh) 2 {( R )‐( S )‐PPF‐PPh 2 }] ( 4 ) and Li[Ir(NHPh) 2 {( R )‐binap}] ( 5 ), respectively. The anionic complexes 4 and 5 react upon protonolysis to give the dinuclear aminato‐bridged derivatives [Ir 2 ( μ ‐NHPh) 2 {( R )‐( S )‐PPF‐PPh 2 } 2 ] ( 6 ) and [Ir 2 (μ‐NHPh) 2 {( R )‐binap} 2 ] ( 7 ), which were characterized by X‐ray crystallography. None of the new complexes 4 – 7 shows catalytic activity in the hydroamination of olefins.