The 1H n.m.r. spectra at ambient temperatures of a number of aminoboranes with general formula ArB(X1)NMe2(I) or PhB(X2)N(R1)R2(II) are reported both for pure liquids and for a variety of solutions. Positive evidence is presented for restricted rotation about the boron–nitrogen bond for the compounds (a) of type (I) with Ar = Ph, X1= Br, Cl, NCO, Me or with Ar =p-MeOC6H4, X = Cl and (b) of type (II)
对于纯液体和纯液体,都报道了许多具有通式ArB(X 1)NMe 2(I)或PhB(X 2)N(R 1)R 2(II)的
氨基
硼烷在环境温度下的1 H nmr光谱。多种解决方案。对于Ar = Ph,X 1 = Br,Cl,NCO,Me或Ar = p -MeOC 6 H 4的类型(I)的化合物(a),围绕
硼-氮键的旋转受限制的积极证据被提出, X = Cl和(b)类型(II),其中X 2 = Cl,R = Et,R 2 = Me或X 2 = Cl,R1 = Pr i,R 2 = Me。考虑了
化学取代时改变
硼取代基和溶剂的影响。