@unpublished{HermannCidMattocketal.2018, author = {Hermann, Alexander and Cid, Jessica and Mattock, James D. and Dewhurst, Rian D. and Krummenacher, Ivo and Vargas, Alfredo and Ingleson, Michael J. and Braunschweig, Holger}, title = {Diboryldiborenes: π-Conjugated B\(_4\) Chains Isoelectronic to the Butadiene Dication}, series = {Angewandte Chemie, International Edition}, journal = {Angewandte Chemie, International Edition}, doi = {10.1002/anie.201805394}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-167977}, year = {2018}, abstract = {sp\(^2\)-sp\(^3\) diborane species based on bis(catecholato)diboron and N-heterocyclic carbenes (NHCs) are subjected to catechol/bromide exchange selectively at the sp\(^3\) boron atom. The reduction of the resulting 1,1-dibromodiborane adducts led to reductive coupling and isolation of doubly NHC-stabilized 1,2-diboryldiborenes. These compounds are the first examples of molecules exhibiting pelectron delocalization over an all-boron chain.}, language = {en} }