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Synthesis, Structure and Electrochemistry of Macrocyclic Tetrametallic Group 6 (Fischer) Carbene Complexes
Author(s) -
LópezAlberca María P.,
Mancheño María J.,
Fernández Israel,
GómezGallego Mar,
Sierra Miguel A.,
Hemmert Catherine,
Gornitzka Heinz
Publication year - 2011
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201001007
Subject(s) - chemistry , electrochemistry , carbene , diamine , tungsten , metal , group (periodic table) , polymer chemistry , crystallography , stereochemistry , organic chemistry , catalysis , electrode
The 1,4‐addition of diamine dinucleophiles to dimetalliccarbene scaffolds 5 yields tetrametallic azamacrocycles 9 and 10 with exocyclic metal–carbene nuclei, in excellent yields and with high stereocontrol. All‐ Z stereoisomers are isolated in all cases, with the exception of the tungsten(0) macrocycle 10 , which is obtained as a mixture of isomers. This methodology allows the preparation of a new type of homo‐ and heterocyclophane metallomacrocycles in which the geometry and the size of the cavity can be designed as a function of the biscarbene complexes employed and the diamines used as linkers. The X‐ray structure of complex 10a showing the high stability of the Z configuration of these compounds and the electrochemistry of the metallomacrocycles prepared are also reported.