TY  - INPR
A1  - Braunschweig, Holger
A1  - Krummenacher, Ivo
A1  - Lichtenberg, Crispin
A1  - Mattock, James
A1  - Schäfer, Marius
A1  - Schmidt, Uwe
A1  - Schneider, Christoph
A1  - Steffenhagen, Thomas
A1  - Ullrich, Stefan
A1  - Vargas, Alfredo
T1  - Dibora[2]ferrocenophane: A Carbene-Stabilized Diborene in a Strained cis-Configuration
T2  - Angewandte Chemie, International Edition
N2  - Unsaturated bridges that link the two cyclopentadienyl ligands together in strained ansa metallocenes are rare and limited to carbon-carbon double bonds. The synthesis and isolation of a strained ferrocenophane containing an unsaturated two-boron bridge, isoelectronic with a C=C double bond, was achieved by reduction of a carbene-stabilized 1,1’-bis(dihaloboryl)ferrocene. A combination of spectroscopic and electrochemical measurements as well as density functional theory (DFT) calculations was used to assess the influence of the unprecedented strained cis configuration on the optical and electrochemical properties of the carbene-stabilized diborene unit. Initial reactivity studies show that the dibora[2]ferrocenophane is prone to boron-boron double bond cleavage reactions.
KW  - Boron
KW  - Metallocenes
KW  - Metallocene
KW  - Bor
KW  - Diborane
KW  - density functional calculations
KW  - strained molecules
KW  - diborenes
Y1  - 2016
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-141981
N1  - This is the pre-peer reviewed version of the following article: Angewandte Chemie, International Edition, Volume 56, Issue 3, 889–892, which has been published in final form at doi:10.1002/anie.201609601. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
ER  - 
TY  - JOUR
A1  - Schmidt, Uwe
A1  - Werner, Luis
A1  - Arrowsmith, Merle
A1  - Deissenberger, Andrea
A1  - Hermann, Alexander
A1  - Hofmann, Alexander
A1  - Ullrich, Stefan
A1  - Mattock, James D.
A1  - Vargas, Alfredo
A1  - Braunschweig, Holger
T1  - Trans‐selektive Dihydroborierung eines cis‐Diborens durch Insertion: Synthese eines linearen sp\(^3\)‐sp\(^2\)‐sp\(^3\)‐Triborans und anschließende Kationisierung
JF  - Angewandte Chemie
N2  - Die Reaktion zwischen Aryl‐ und Amino(dihydro)boranen und Dibora[2]ferrocenophan 1 führt zur Bildung von 1,3‐trans‐Dihydrotriboranen durch formale Hydrierung und Insertion eines Borylens in die B=B Doppelbindung. Die Aryltriboran‐Derivate unterliegen einer reversiblen Photoisomerisierung zugunsten eines cis‐1,2‐μ‐H‐3‐Hydrotriborans, während eine Hydridabstraktion zu kationischen Triboranen führt, welche die ersten doppelt basenstabilisierten B\(_3\)H\(_4\)\(^+\)‐Analoga darstellen.
KW  - Diboren
KW  - Hydroborierung
KW  - Kation
KW  - Photoisomerisierung
KW  - Triboran
Y1  - 2020
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-219713
VL  - 132
IS  - 1
ER  - 
TY  - JOUR
A1  - Schmidt, Uwe
A1  - Werner, Luis
A1  - Arrowsmith, Merle
A1  - Deissenberger, Andrea
A1  - Hermann, Alexander
A1  - Hofmann, Alexander
A1  - Ullrich, Stefan
A1  - Mattock, James D.
A1  - Vargas, Alfredo
A1  - Braunschweig, Holger
T1  - trans-Selective Insertional Dihydroboration of a cis-Diborene: Synthesis of Linear sp\(^3\)-sp\(^2\)-sp\(^3\)-Triboranes and Subsequent Cationization
JF  - Angewandte Chemie International Edition
N2  - The reaction of aryl‐ and amino(dihydro)boranes with dibora[2]ferrocenophane 1 leads to the formation 1,3‐trans ‐dihydrotriboranes by formal hydrogenation and insertion of a borylene unit into the B=B bond. The aryltriborane derivatives undergo reversible photoisomerization to the cis ‐1,2‐μ‐H‐3‐hydrotriboranes, while hydride abstraction affords cationic triboranes, which represent the first doubly base‐stabilized B3H4\(^+\) analogues.
KW  - cations
KW  - hydroboration
KW  - photoisomerization
KW  - triboranes
KW  - diborenes
Y1  - 2020
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-208090
VL  - 59
IS  - 1
ER  -