title: Stepwise formation of a molecular square with bridging NH,O-substituted dicarbene building blocks.
abstract: The β,β'-bis(triisopropylsiloxy)phenyl-1,4-diisocyanide 3 and [Ir(Cp*)Cl(2)](2) were used for the stepwise assembly of the [Ir(Cp*)Cl] cornered molecular square [6](Cl)(4). Synthesis of the tetrakis(diisocyanide) bridged molecular square [Ir(Cp*)Cl(3)](4)(BF(4))(4) [5](BF(4))(4) followed by cleavage of the O-Si(i-Pr)(3) bonds of the diisocyanide bridges with HCl/i-PrOH led to an intramolecular attack of the liberated hydroxyl groups at the isocyanide carbon atoms with formation of molecular square [6](Cl)(4) featuring four dicarbene linkers.
authors: Institut für Anorganische und Analytische Chemie, Universität Münster, Corrensstrasse 30, D-48149 Münster, Germany.
authors: Fabian M
authors: FM
authors: Conrady
authors: Roland
authors: R
authors: Fröhlich
authors: Christian
authors: C
authors: Schulte to Brinke
authors: Tania
authors: T
authors: Pape
authors: F Ekkehardt
authors: FE
authors: Hahn