Premium
Reductive Coupling of CO: Formation of a 1:1 Adduct of η 2 ‐Ketone‐ and Enediolato‐Complex upon Carbonylation of Bis(cyclopentadienyl)hafnacyclobutane
Author(s) -
Erker Gerhard,
Czisch Peter,
Schlund Rüger,
Angermund Klaus,
Krüger Carl
Publication year - 1986
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.198603641
Subject(s) - adduct , cyclopentadienyl complex , chemistry , carbonylation , ketone , yield (engineering) , molecule , medicinal chemistry , coupling (piping) , stereochemistry , photochemistry , carbon monoxide , organic chemistry , catalysis , materials science , metallurgy
The hafnacyclobutane 1 takes up 1.5 equivalents of CO very rapidly even under normal conditions, forming the polycyclic complex 4 as sole product in good yield. 4 is a stable 1:1 adduct of [(η 2 ‐ccyclobutanone)HfCp 2 ] 2 and the hafnocene enediolate complex 3 , the formation of which involves the coupling of two CO molecules——possibly via the intermediacy of the η 2 ‐ketone complex 2 .