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Unsymmetric diborane(4) compounds for small molecule activation and B-B coupling

Total Cost €


EC-Contrib. €






 DIBOR project word cloud

Explore the words cloud of the DIBOR project. It provides you a very rough idea of what is the project "DIBOR" about.

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Project "DIBOR" data sheet

The following table provides information about the project.


Organization address
address: OXFORD ROAD
postcode: M13 9PL

contact info
title: n.a.
name: n.a.
surname: n.a.
function: n.a.
email: n.a.
telephone: n.a.
fax: n.a.

 Coordinator Country United Kingdom [UK]
 Project website
 Total cost 183˙454 €
 EC max contribution 183˙454 € (100%)
 Programme 1. H2020-EU.1.3.2. (Nurturing excellence by means of cross-border and cross-sector mobility)
 Code Call H2020-MSCA-IF-2015
 Funding Scheme MSCA-IF-EF-ST
 Starting year 2016
 Duration (year-month-day) from 2016-05-01   to  2018-04-30


Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 


 Project objective

Organoboron complexes are ubiquitous in synthesis due to their utility in functional group transformations and the Nobel Prize winning Suzuki-Miyaura reaction. Furthermore, the advent of frustrated Lewis pair chemistry and BB multiple bonds has demonstrated that organoboron compounds can activate small molecules (e.g., CO) and sigma bonds (including H2), reactivity previously thought to be the domain of transition metal catalysts. As part of the renaissance in organoboron chemistry diborane(4) compounds (R2B-BR2) have received considerable interest, particularly that react as boryl anion equivalents. Recent unpublished work at UNIMAN has developed an efficient, scalable route to a synthetically useful unsymmetric diborane(4) compound, specifically (RO)2B-BCl2(NHC), (1, NHC = N-heterocyclic Carbene). The DIBOR project will exploit this breakthrough using 1 (and new congeners synthesised in this fellowship) as key precursors to; (i) readily synthesised cationic diboranes that are strong electrophiles able to activate small molecules and sigma bonds (C-H) and to diborylate pi nucleophiles; (ii) extended homocatenated boron compounds containing both electron precise B-B and B=B bonds. Advances in (i) will generate new transition metal free routes to diborylated hydrocarbons for use as synthetic intermediates. Whilst the demonstration of H-H and C-H activation will demonstrate that individual steps are viable for future application using diboranes in catalytic sigma bond transformations. Advances in (ii) will generate fundamentally new boron entities, e.g., electron precise B4 chains containing B-B and B=B bonds. The chemistry of electron precise boranes is in its infancy but dramatic differences in reactivity to the isoelectronic hydrocarbons have already been reported. Precursor 1 is carefully designed to prevent borane cluster formation on reductive coupling thus facilitate formation of homo-catenated chains.


year authors and title journal last update
List of publications.
2018 Alexander Hermann, Jessica Cid, James Mattock, Rian Dewhurst, Ivo Krummenacher, Alfredo Vargas, Michael J. Ingleson, Holger Braunschweig
Diboryldiborenes: pi-Conjugated B4 Chains Isoelectronic to the Butadiene Dication
published pages: , ISSN: 1433-7851, DOI: 10.1002/anie.201805394
Angewandte Chemie International Edition 2019-06-13
2018 Jessica Cid, Alexander Hermann, James E. Radcliffe, Liam D. Curless, Holger Braunschweig, Michael J. Ingleson
Synthesis of Unsymmetrical Diboron(5) Compounds and Their Conversion to Diboron(5) Cations
published pages: 1992-1998, ISSN: 0276-7333, DOI: 10.1021/acs.organomet.8b00288
Organometallics 37/12 2019-06-13

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