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Tetracarbonyleisenkomplexe von trans ‐Cycloalkenen und trans ‐Cycloalkadienen. Vorläufige Mitteilung
Author(s) -
von Büren Martin,
Hansen HansJürgen
Publication year - 1977
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.19770600823
Subject(s) - chemistry , double bond , cyclooctene , cis–trans isomerism , stereochemistry , hexene , olefin fiber , pentane , bicyclic molecule , medicinal chemistry , diene , catalysis , polymer chemistry , organic chemistry , natural rubber , ethylene
Tetracarbonyliron Complexes of trans ‐Cycloalkenes and trans ‐Cycloalkadienes Relatively stable olefin tetracarbonyliron complexes were obtained by reaction of Fe 2 (CO) 9 with trans ‐cyclooctene ( t ‐ 1 ), trans ‐cyclononene ( t ‐ 2 ) and trans ‐cyclodecene ( t ‐ 3 ) (Scheme 2) in pentane solution at room temperature. Furthermore, trans , cis ‐cycloocta‐1,5‐ and ‐1,3‐diene ( t , c ‐ 7 and t , c ‐ 8 ) as well as trans , trans , cis ‐2,8,12‐ trans ‐bicyclo[8.4.0]tetradecatriene ( t , t , c ‐ 9 ) gave stable complexes only with the trans ‐configurated double bond (Scheme 3) . An olefin tetracarbonyliron complex was also obtained with bicyclo[4.3.1]deca‐7,9‐diene ( 10 ) which reacted only at the strained bridge‐head double bond. The IR. spectra of the new complexes are in agreement with an equatorial position of the olefinic ligands in the trigonal bipyramide of the iron.