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Reaction of (η 5 ‐C 5 H 5 )Fe(CO) 2 I with Anionic Bidentate Phosphine Ligands PPh 2 ( o ‐C 6 H 4 NHLi) or PPh 2 ( o ‐C 6 H 4 OLi)
Author(s) -
Peng James,
Wen YuhSheng,
Liu LingKang
Publication year - 2001
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.200100120
Subject(s) - chemistry , denticity , deprotonation , phosphine , protonation , yield (engineering) , medicinal chemistry , chelation , x ray crystallography , reagent , stereochemistry , crystallography , crystal structure , inorganic chemistry , ion , diffraction , catalysis , biochemistry , materials science , physics , organic chemistry , optics , metallurgy
The o ‐substituted hybrid phenylphosphines, PPh 2 ( o ‐C 6 H 4 NH 2 ) and PPh 2 ( o ‐C 6 H 4 OH), could be deprotonated with LDA or n ‐BuLi to yield PPh 2 ( o ‐C 6 H 4 NHLi) and PPh 2 ( o ‐C 6 H 4 OLi), respectively. When added to a solution of (η 5 ‐C 5 H 5 )Fe(CO) 2 I at room temperature, these two lithiated reagents produce a chelated neutral complex 1 (η 5 ‐C 5 H 5 )Fe(CO)[C(O)NH( o ‐C 6 H 4 )PPh 2 ‐ C,P ‐η 2 ] for the former and mainly a zwitterionic complex 2 , (η 5 ‐C 5 H 5 )Fe + (CO) 2 [PPh 2 ( o ‐C 6 H 4 O − )] for the latter. Complex 1 could easily be protonated and then decarbonylated to give 4 [(η 5 ‐C 5 H 5 )Fe(CO){NH 2 ( o ‐C 6 H 4 )PPh 2 ‐ N,P ‐η 2 } + ]. Complexes 1 and 4‐I have been crystallographically characterized with X‐ray diffraction.