A Boron–Boron Double Bond in the Dianions of Tetra(amino)diborates

✍ Scribed by Heinrich Nöth; Jörg Knizek; Werner Ponikwar

• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 323 KB
• Volume: 1999
• Category: Article
• ISSN: 1434-1948
• DOI: 10.1002/(sici)1099-0682(199911)1999:11<1931::aid-ejic1931>3.0.co;2-d

✦ Synopsis

Diboron compounds / B-B double bond / Dilithium tetra(amino)diborates(2-) / Structure elucidation A series of mixed tetraaminodiborane(4) compounds bearing bidentate ligand coordinating pairwise through two of its nitrogen atoms to an Li center, which is tricoordinated by one pyrrolyl, indolyl, and carbazolyl substituents besides dimethylamino groups has been prepared and subjected to O and the two N atoms. The new diborates are isoelectronic with tetraaminoethylenes and are expected to be electron-reduction with elemental Li in the presence of diethyl ether. Tetraaminodiborates(2-) are formed, which feature a boron-transfer reagents. boron double bond. The diborate anion acts as a double also in the fact that the two (R 2 N)RB units adopt in-[ ] Part 244: Ref. sidered as being almost coplanar. This allows the formation