Studies on the Chemistry of Aziridine Boranes.

N-Organotin aziridines and other cyclic amines and their adducts

“…46 Tetrakis(dimethy1amino)tin undergoes transamination with excess aziridine to liberate dimethylamine and precipitate the tetrakis( 1 -aziridinyl)tin Table I, are in the 0.8-l.l-mm/s range, while the N-trimethyltin aziridine exhibits a Q S value well over 2.0 mm/s. The analogous aziridine-borane is known.…”

“…The analogous aziridine-borane is known. 46 Tetrakis(dimethylamino)tin undergoes transamination with excess aziridine to liberate dimethylamine and precipitate the tetrakis( 1 -aziridinyl)tin I, are in the 0.8-1.1-mm/s range, while the (V-trimethyltin aziridine exhibits a QS value well over 2.0 mm/s. The substitution of a methyl group on the aziridine ring or increasing the ring size to four reduces the QS to an intermediate value.…”

Imines, Cyclic

“…Ethyleneimine forms cyclic trimers with hydrides or alkyls of elements of Group IIIA, with the liberation of hydrogen or hydrocarbons (143)(144)(145)(146). In the case of diborane or trimethylboron, the initial adducts can be isolated (147)(148)(149)(150). These aziridine boranes on the one hand undergo electrophilic reactions with opening of the aziridine ring, and on the other hand have the reducing properties of aziridine boranes (149) (see Hydroboration).…”

Structural and thermochemical studies of pyrrolidine borane and piperidine borane by gas electron diffraction and quantum chemical calculations

“…[3][4][5][6][7] Although closelyrelated linear analogues, such as ammonia borane (NH3BH3) [8][9][10][11][12][13][14][15][16] and alkyl amine boranes, [17][18][19][20][21][22][23][24][25][26][27][28] are well characterised, very few CABs have been studied both in terms of their structure and chemical properties. The first CAB to be synthesised was the three-membered aziridine borane; [29][30][31] the crystal structure was determined subsequently, 32 and the complex was later characterised by NMR and IR techniques 33 as well as low-level ab initio and semi-empirical methods. 34 Microwave spectroscopy (MWS) was later employed to study the barrier to internal rotation and gas-phase structure.…”