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Controlled Synthesis of Oligomers Containing Main‐Chain B(sp 2 )‐B(sp 2 ) Bonds
Author(s) -
Schorr Fabian,
Schopper Nils,
Riensch Nicolas,
Fantuzzi Felipe,
Neder Marco,
Dewhurst Rian D.,
Thiess Torsten,
Brückner Tobias,
Hammond Kai,
Helten Holger,
Finze Maik,
Braunschweig Holger
Publication year - 2021
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.202103366
Subject(s) - diborane , boranes , metathesis , chemistry , hydroboration , macromolecule , catenation , polymer chemistry , nuclear magnetic resonance spectroscopy , synthon , polymerization , stereochemistry , organic chemistry , boron , polymer , catalysis , dna , biochemistry
A number of novel alkynyl‐functionalized diarylbis(dimethylamino)diboranes(4) are prepared by salt metathesis, and the appended alkynyl groups are subjected to hydroboration. Their reactions with monohydroboranes lead to discrete boryl‐appended diborane(4) species, while dihydroboranes induce their catenation to oligomeric species, the first known examples of well‐characterized macromolecular species with B−B bonds. The oligomeric species were found to comprise up to ten repeat units and are soluble in common organic solvents. Some of the oligomeric species have good air stability and all were characterized by NMR and vibrational spectroscopy and size‐exclusion chromatography techniques.