Haddad Salim F, Ali Basem F, Al-Far Rawhi
Acta Crystallogr Sect E Struct Rep Online. 2012 Sep 1;68(Pt 9):o2786. doi: 10.1107/S1600536812036136. Epub 2012 Aug 25.
In the title salt, C(6)H(9)N(2) (+)·Br(2)I(-), the cation is essentially planar (r.m.s. deviation = 0.0062 Å for the non-H atoms) while the anion is almost linear with a Br-I-Br angle of 177.67 (2)°. The crystal packing shows two anions and two cations connected via N-H⋯Br and (pyridine)N-H⋯Br hydrogen-bonding inter-actions, forming centrosymmetric tetra-mers with R(4) (4)(16) ring motifs. Very weak offset aromatic π-π stacking interactions [centroid-centroid separation = 4.038 (4), slippage = 1.773 Å] also occur.
在标题盐C(6)H(9)N(2) (+)·Br(2)I(-)中,阳离子基本呈平面结构(非H原子的均方根偏差 = 0.0062 Å),而阴离子几乎呈线性,Br - I - Br角为177.67 (2)°。晶体堆积显示两个阴离子和两个阳离子通过N - H⋯Br和(吡啶)N - H⋯Br氢键相互作用相连,形成具有R(4) (4)(16)环 motif的中心对称四聚体。还存在非常弱的偏移芳香π - π堆积相互作用[质心 - 质心间距 = 4.038 (4),滑移 = 1.773 Å]。