[space group: P21/n, a = 806.84(6) pm, b = 1247.96(9) pm, c = 974.91(7) pm, β = 90.493(3)° and Z = 4] confirmed that both 1 and 3, consistent with their 14-skeletal electron counts, adopt octahedral structures distorted from regular by two arsenic or phosphorus atoms in the 1,2-positions. The shortest boron–boron bonds within the cluster frameworks are located between the boron atoms antipodal to the heteroatoms
全
溴化阿萨
硼烷 closo-1,2-As2B4Br4 (1) 和 closo-1,2-As2B10Br10 (2) 的合成是通过
B2Br4 和
AsBr3 在 500 °C 下共热解而发生的。可升华产物在真空中的
重复分馏得到纯形式的两种化合物。正交晶系-1,2-As2B4Br4 (1) [空间群: Pbcn, a = 2345.48(17) pm, b = 627.31(4) pm, c = 1294.02(9) pm for Z = 的X射线结构测定8] 和相应的
磷化合物,单斜晶 closo-1,
2-P2B4Br4 (3) [空间群:P21/n, a = 806.84(6) pm, b = 1247.96(9) pm, c = 974.91(7) pm , β = 90.493(3)° 和 Z = 4] 证实 1 和 3 与它们的 14 骨架电子计数一致,采用八面体结构,由 1,2 位的两个
砷或
磷原子从规则中扭曲。