Building a parent iridabenzene structure from acetylene and dichloromethane on an iridium center.
Parenthood: The reaction of [TpIr(C2H4)2] (1) (Tp=hydrotris(pyrazolyl)borate) with acetylene in CH2 Cl2 affords a 1:1 mixture of the "parent" metallabenzene 2 (that is, all the ring carbon centers are CH units) and the β-Cl substituted vinyl species 3. Generation of 2 is by the coupling of an iridacyclopentadiene (formed from two acetylene molecules at the Ir center) with the dichloromethane-derived chlorocarbene ":C(H)Cl" and a subsequent α-Cl elimination event.
Instituto de Investigaciones Químicas (IIQ) and Departamento de Química Inorgánica, Consejo Superior de Investigaciones Científicas (CSIC) and Universidad de Sevilla, Avda. Américo Vespucio 49, 41092 Sevilla (Spain).
Ángela
Á
Vivancos
Margarita
M
Paneque
Manuel L
ML
Poveda
Eleuterio
E
Álvarez
CC coupling; carbene ligands; dichloromethane activation; iridabenzenes; iridium