5-[4-(1,2,4-Triazol-4-yl)phenyl]-1H-tetrazole, C9H7N7, (I), an asymmetric heterobifunctional organic ligand containing triazole (tr) and tetrazole (tz) termini linked directly through a 1,4-phenylene spacer, crystallizes in the polar space groupPc. The heterocyclic functions, serving as single hydrogen-bond donor (tz) or acceptor (tr) units, afford hydrogen-bonded zigzag chains with no crystallographic centre of inversion. In the structure ofcatena-poly[[diaquacadmium(II)]bisμ2-5-[4-(1,2,4-triazol-4-yl)phenyl]tetrazol-1-ido-κ2N1:N1′}], [Cd(C9H6N7)2(H2O)2]n, (II), the CdIIdication resides on a centre of inversion in an octahedral N4O2} environment. In the equatorial plane, the CdIIpolyhedron is built up from four N atoms of two kinds, namely oftrans-coordinating tr and tz fragments [Cd—N = 2.2926 (17) and 2.3603 (18) Å], and the coordinating aqua ligands occupy the two apical sites. The metal centres are separated at a distance of 11.1006 (7) Å by means of the double-bridging tetrazolate anion,L−, forming a chain structure. The water ligands and tz fragments interact with one another, like a double hydrogen-bond donor–acceptor synthon, leading to a hydrogen-bonded three-dimensional array.
5-[4-(
1,2,4-三唑-4-基)苯基]-1H-
四氮唑,
C9H7N7,(I) 是一种不对称的杂多官能团有机
配体,含有通过 1,4-亚苯基间隔直接连接的三唑(tr)和
四氮唑(tz)末端,在极性空间群 PC 中结晶。杂环功能作为单一的氢键供体(tz)或受体(tr)单元,产生氢键人字链,且没有晶体学上的反转中心。在[Cd(C9H6N7)2(
H2O)2]n,[Cd(C9H6N7)2( )2]n,(II)]catena-poly[[重
镉(II)]双μ2-5-[4-(
1,2,4-三唑-4-基)苯基]
四唑-1-ido-κ2N1:N1′}]结构中,CdIIdication 位于八面体
N4O2} 环境中的一个反转中心。在赤道面上,CdII 多面体由两种类型的四个 N 原子构成,即跨配位的 tr 和 tz 片段[Cd-N = 2.2926 (17) Å 和 2.3603 (18) Å],配位的
水配体占据两个顶端位点。
金属中心通过双桥四氮杂环阴离子 L- 相隔 11.1006 (7) Å,形成链状结构。
水配体和 tz 片段相互影响,就像一个双氢键供体-受体协同体,从而形成一个氢键三维阵列。