New alkyl derivatives of the nido-dicarbapentaborane, 1,2-C(2)B(3)H(7), and arachno-carbapentaborane, 1-CB(4)H(10), have been identified as the main volatile carbaborane products in quenched gas-phase reactions of tetraborane(10), B(4)H(10), with alkyl-substituted ethynes RC[triple bond]CR' (R = Me, Et, (n)Pr or (t)Bu, R' = H; R = Me or Et, R' = Me). The gaseous mixtures were heated at 70 degrees C
Nido-dicarbapentaborane新烷基衍
生物1,2-C(2)B(3)H(7)和arachno-carbapentaborane 1-CB(4)H(10)被确定为主要的挥发性
碳硼烷四
硼烷(10),B(4)H(10)与烷基取代的
乙炔RC [三键] CR'(R = Me,Et,(n)Pr或(t)Bu ,R'= H; R = Me或Et,R'= Me)。将气态混合物在70℃加热,并通过气相质谱法监测。当
乙炔用完时,将每个反应淬灭。B(4)H(10)和Me(3)SiC [三键] CH的淬火气相反
应得到单一的挥发性
碳硼烷产物1-Me(3)Si-1,2-C(2)B (3)H(6)。