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Polynuclear Iron and Rhodium Complexes of 7‐Oxa[2.2.1]hericene (2,3,5,6‐tetramethylidenebicyclo[2.2.1]heptan‐7‐one)
Author(s) -
Rubello Albino,
Vogel Pierre
Publication year - 1989
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/hlca.19890720121
Subject(s) - chemistry , rhodium , cyclooctene , medicinal chemistry , stereochemistry , catalysis , organic chemistry
μ‐Carbonyl(RhRh)di(η 5 ‐indenyl)[(2 R ,3 S )‐ C ,2,3, C ‐η‐(2,3,4,5‐tetramethylidenebicyclo[2.2.1]heptan‐7‐one)]]‐dirhodium(I)(RhRh) (7) and cis ‐μ‐[(2 R ,3 S ,5 R ,6 S ))‐ C ,2,3, C ‐η: C ,5,6, C ‐η‐(2,3,5,6‐tetramethylidenebicyclo[2.2.1]heptan‐7‐one)]bis[μ‐carbonyldi(η 5 ‐indenyl)dirhodium(I)(RhRh)] ( 8 ) have been prepared. Complex 7 reacts with Fe 2 (CO) 9 in hexane/MeOH and gives cis ‐μ‐[(2 R ,3 S ,5 R ,6 S ] ( 9 ), trans ‐μ‐[(2 R ,3 S ,5 S ,6 R )‐ C ,2,3, C ‐η: C ,5,6, C ‐η‐(2,3,5,6‐tetramethylidenebicyclo[2.2.1]heptan‐7‐one)‐μ‐carbonyldi(η 5 ‐indenyl)dirhodium(I)(RhRh)‐(tricarbonyliron) ( 10 ), and, μ‐carbonyl(RhRh)[(2 R ,3 S )‐ C ,2,3, C ‐η‐(2,3‐dimethyl‐5,6‐dimethylidenebicyclo‐[2.2.1]hept‐2‐en‐7‐one)]di(η 5 ‐indenyl)dirhodium(I)(RhRh) ( 11 ). Treatment of 7‐oxa[2.2.1]hericene ( 4 ) with Fe 2 (CO) 9 or (cyclooctene) 2 Fe(CO) 3 gave a 1:2 mixture of cis ‐μ‐[(2 R ,3 S ,5 R ,6 S )‐] ( 12 ) and trans ‐μ‐[(2 R ,3 S ,5 S ,6 R )‐ C ,2,3, C ‐η: C ,5,6, C ‐η‐( 2,3,5,6‐tetramethylidenebicyclo[2.2.1]heptan‐7‐one)]bis(tricarbonyliron) ( 13 ).