The reaction between B2(NMe2)4 and 1,2-(NH2)2-4-ButC6H3 affords the diborane(4) compound 1,2-B21,2-(NH)2-4-ButC6H3}2 as the exclusive product whilst the reaction between rac-1,2-(NH2)2C6H10 and B2(NMe2)4 also affords only the 1,2-isomer, i.e.1,2-B21,2-(NH)2C6H10}2, which is shown to be the more stable isomer by computational methods. The previously reported compounds 1,1-B21,2-(NH)2C6H4}2 and 1,2-B21,2-(NH)2C6H4}2 both react with four equivalents of BunLi to give what are presumed to be tetra-anions which react further with MeI, SnClMe3 or SnClPh3 to give the tetrasubstituted products 1,1-B21,2-(NMe)2C6H4}2, 1,1-B21,2-(NSnMe3)2C6H4}2 and 1,2-B21,2-(NSnPh3)2C6H4}2 respectively. The compound 1,1-B21,8-(NH)2C10H6}2 has also been prepared from the reaction between B2(NMe2)4 and 1,8-diaminonaphthalene. Lithiation and subsequent reaction with SnClMe3, SnCl2Me2 or SnCl2Ph2 affords 1,1-B21,8-(NSnMe3)2C10H6}2, 1,1-B21,8-(N2-μ-SnMe2)C10H6}2 and 1,1-B21,8-(N2-μ-SnPh2)C10H6}2 respectively. All new compounds have been characterised by X-ray crystallography.
B2(NMe2)4 和 1,2-(NH2)2-4-ButC6H3 反应生成的二
硼烷(4)化合物 1,2-B21,2-(NH)2-4-ButC6H3}2 是唯一的产物,而 rac-1,2-(NH2)2C6H10 和 B2(NMe2)4 反应也只生成 1,2- 异构体,即 1,2-B21,2-(NH)2C6H10}2,通过计算方法证明它是更稳定的异构体。之前报道的化合物 1,1-B21,2-(NH)2C6H4}2 和 1,2-B21,2-(NH)2C6H4}2 都与四当量的 BunLi 反应,生成四阴离子,并与 MeI、SnClMe3 或 SnClPh3 反应,分别得到四取代产物 1,1-B21,2-(NMe)2C6H4}2、1,1-B21,2-(NSnMe3)2C6H4}2 和 1,2-B21,2-(NSnPh3)2C6H4}2。化合物 1,1-B21,8-(NH)2 }2 也是由 B2(NMe2)4 和 1,8- 二
氨基
萘反应制备的。通过
锂化并随后与 SnClMe3、SnCl2Me2 或 SnCl2Ph2 反应,可分别得到 1,1-B21,8-(NSnMe3)2 }2、1,1-B21,8-(N2-μ-SnMe2)
C10H6}2 和 1,1-B21,8-(N2-μ-SnPh2) }2。所有新化合物都已通过 X 射线晶体学鉴定。