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A Boron–Boron Double Bond in the Dianions of Tetra(amino)diborates
Author(s) -
Nöth Heinrich,
Knizek Jörg,
Ponikwar Werner
Publication year - 1999
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/(sici)1099-0682(199911)1999:11<1931::aid-ejic1931>3.0.co;2-d
Subject(s) - chemistry , boron , tetra , denticity , double bond , ligand (biochemistry) , ion , reagent , diethyl ether , ether , electron transfer , electron deficiency , medicinal chemistry , inorganic chemistry , crystallography , polymer chemistry , photochemistry , organic chemistry , crystal structure , biochemistry , receptor
A series of mixed tetraaminodiborane(4) compounds bearing pyrrolyl, indolyl, and carbazolyl substituents besides dimethylamino groups has been prepared and subjected to reduction with elemental Li in the presence of diethyl ether. Tetraaminodiborates(2–) are formed, which feature a boron–boron double bond. The diborate anion acts as a double bidentate ligand coordinating pairwise through two of its nitrogen atoms to an Li center, which is tricoordinated by one O and the two N atoms. The new diborates are isoelectronic with tetraaminoethylenes and are expected to be electron‐transfer reagents.