Beiträge zur chemie des bors XLVIII. Zur kenntnis von bis(dialkylboryl)aminen
作者:Heinrich Nöth、Heinrich Vahrenkamp
DOI:10.1016/s0022-328x(00)89761-2
日期:1969.3
Diborylamines of the types (R2B)2NH and (R2B)2NR′ (R = CH3, C2H5, C3H7, C4H9;R′ = CH3) are obtained (a) from dialkylhaloboranes and disilazanes, (b) from dialkylhaloboranes and N-metalated aminoboranes, and (c) by aminolysis of dialkyl(mthylthio)boranes. They are thermodynamically unstable with respect to a decomposition into trialkylboranes and borazine derivatives; their decomposition is catalysed
得到(R 2 B)2 NH和(R 2 B)2 NR'(R = CH 3,C 2 H 5,C 3 H 7,C 4 H 9 ; R'= CH 3)类型的二硼胺(a)来自二烷基卤庚烷和二硅氮烷,(b)来自二烷基卤庚烷和N-金属化的氨基硼烷,以及(c)通过二烷基(甲硫基)硼烷的氨解反应)。就分解成三烷基硼烷和硼嗪衍生物而言,它们在热力学上是不稳定的。它们的分解主要是由二烷基卤呋喃酮催化的。
NMR-spektroskopische untersuchungen an borverbindungen III. 1H-NMR-spektren von methyl- und äthylboranen
作者:H. Nöth、H. Vahrenkamp
DOI:10.1016/s0022-328x(00)90894-5
日期:1968.4
1H NMR spectra of 71 methyl- and ethylboranes R3−nBXn (R = Me. Et; X =NMe2, OMe, F, SMe, Cl, Br, I) and derivatives thereof are reported. From the chemical shifts the electronegativity of boron in these compounds has been estimated and the inductive effect, π-bonding and neighbour anisotropy effect of the substituents X on the spectra are discussed. The conclusions arrived at are further substantiated
报道了71个甲基和乙基硼烷R 3- n BX n(R = Me。Et; X = NMe 2,OMe,F,SMe,Cl,Br,I)及其衍生物的1 H NMR光谱。根据化学位移,估计了这些化合物中硼的电负性,并讨论了取代基X在光谱上的感应效应,π键和邻域各向异性效应。通过取代基X = NMe 2,OMe和SMe的1 H NMR数据以及与11 B化学位移的比较进一步证实了得出的结论。