New Synthesis of Alkyldichloroboranes

Hydrogenation of Boron Trichloride to Dichloroborane. A New Route to Diborane

“…in accordance with information supplied to us privately by Stern and later published (7). The spectrum of dichloroborane showed a singlet B-H absorption a t 2620 cm.+ and doublets at 1098,1084 cm.-l and a t 898, 885 cm.?…”

“…In 1958 a new process was developed in this laboratory in which boron trichloride is hydrogenated to dichloroborane simply by reaction with hydrogen a t elevated temperatures in the gas phase (7,70). The process does not employ metals or metal hydrides as halogen acceptors.…”

“…The equilibrium constant for the vapor phase reaction, Kp(dia), could be calculated from the relation(7) where F is the fugacity. The equilibrium constant for the vapor phase reaction, Kp(dia), could be calculated from the relation(7) where F is the fugacity.…”

Synthese von Diboraheterocyclen mit einer BC3B-Gruppierung / Synthesis of Diboraheterocycles with a BC3B Unit

“…Ebenso reagiert HBC12 in der Gasphase mit Allen zum l,2-Bis(dichloroboryl)propan [5], Wir berichten hier über einen einfachen Zugang zu l a durch Umsetzung von HBCl2 O Et2 mit Allen in Gegenwart von BC13. Durch anschließen de partielle Aminierung und Ringschlußreaktion mittels Na/K-Legierung gelang erstmals die D ar stellung des 1,2-Diborolans 2b [6], Kürzlich be schrieben Herberich et al [7] die Synthese des 1,2-Bis(diethylamino)-Derivats von 2.…”

Dichloroborane Diethyl Etherate

“…In contrast, dichloroborane reacts readily with alkenes in the gas phase. 10 Apparently, strong complexation with ether significantly decreases the reactivity. This difficulty can be circumvented by the addition of boron trichloride, a strong Lewis acid, liberating dichloroborane from the complex with instantaneous precipitation of BCl 3 ·OEt 2 (eq 1).…”