The phosphorus interhalides [PBr4][IBr2] (1) and [PBr4]2[I5Br7] (2) were prepared by reaction of PBr5 and the interhalogen IBr in the ionic liquid [MeBu3N][N(Tf)2] (N(Tf)2: bis(trifluoromethylsulfonyl)amide). [PBr4][IBr2] (1) consists of tetrahedral [PBr4]+ cations and linear [IBr2]− anions. [PBr4]2[I5Br7] (2) also contains [PBr4]+ cations as well as the iodine bromide anion [I5Br7]2−. The latter represents
卤化磷[PBr 4 ] [IBr 2 ](1)和[PBr 4 ] 2 [I 5 Br 7 ](2)是通过在
离子液体[MeBu 3 N]中使PBr 5与卤间IBr反应制得的。N(Tf)2 ](N(Tf)2:双(三
氟甲基磺酰基)酰胺。[PBr 4 ] [IBr 2 ](1)由四面体[PBr 4 ] +阳离子和线性[IBr 2 ] -阴离子组成。[PBr 4 ] 2[I 5 Br 7 ](2)还包含[PBr 4 ] +阳离子以及
溴化
碘阴离子[I 5 Br 7 ] 2-。后者代表最大的已知聚
碘二
溴化物。此外,(2)在300℃以下显示出96.8wt %的显着卤素释放(IBr和Br 2)。对于三元体系P–Br–I,(1)和(2)是最早通过晶体结构分析表征的化合物。通过能量色散X射线(EDX)分析,热重分析(TG)和拉曼光谱进一步验证了组成,键合情况和性能。