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Chlorometallate-Pyridinium Boronic Acid Salts for Crystal Engineering: Synthesis of One-, Two-, and Three-Dimensional Hydrogen Bond Networks

机译:用于晶体工程的氯金属-吡啶鎓硼酸盐:一维,二维和三维氢键网络的合成

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摘要

A series of new crystal structures of salts containing 3- and 4-pyridineboronic acid (3- and 4-pba) with chlorometallate have been prepared: [4-pbaH][MnCl2] (1), [4-pbaH][CdCl2], (2), [4-pbaH]2[CuCl4] (3), [4-pbaH]2[PdCl4] (4), [3-pbaH](2)[CdCl4] (5), [3-pbaH][CuCl3(OH2)] (6), and [3-pbaH][PdCl2] (7). In these salts five structural forms for the chlorometallate species are observed: mononuclear square planar [M = Pd (4 and 7)], dimeric square-pyramidal [M = Cu (3)], polymeric square-pyramidal [M = Cu (6)], polymeric trans-edge-sharing octahedral [M = Mn (1), Cd (2)], and polymeric cis-edge-sharing octahedral [M = Cd (5)]. The cyclic R2,2(8) boronic acid dimer is formed in the salt of 1-5. NH...Cl2M synthons A have been exploited in 1-4, 6, and 7. Both NH...Cl2M (sythons A) and B(OH)2...Cl2M (sythons B) interactions give rise to a synthon of form I in 6. The uncommon folded conformation of the NH...Cl2M (synthons A) are formed in 7. The NH or OH donors and consequent branching of the NH...Cl hydrogen-bond network leads to one-, two-, and three-dimensional structures. These structures are further stabilized by CH...O and CH...Cl and p...p stacking interactions.
机译:制备了含有3-和4-吡啶硼酸(3-和4-pba)与金属氯酸盐的盐的一系列新晶体结构:[4-pbaH] [MnCl2]( 1 ),[ 4-pbaH] [CdCl2],( 2 ),[4-pbaH] 2 [CuCl4]( 3 ),[4-pbaH] 2 [PdCl4](<粗体> 4 ),[3-pbaH](2)[CdCl4]( 5 ),[3-pbaH] [CuCl3(OH2)]( 6 )和[3-pbaH] [PdCl2]( 7 )。在这些盐中,观察到五种金属氯化物的结构形式:单核方形平面[M = Pd( 4 7 )],二聚体方形金字塔形[M = Cu( 3 )],聚合方形金字塔形[M = Cu( 6 )],聚合反边共享八面体[M = Mn( 1 ),Cd( 2 )]和聚合的顺式边缘共享八面体[M = Cd( 5 )]。在 1-5 的盐中形成环状的R2,2(8)硼酸二聚体。 NH ... Cl2M合成子 A 已被 1-4 6 7 开发。 NH ... Cl2M(sythons A )和B(OH)2 ... Cl2M(sythons B )相互作用均产生 I形式的合成子 6 中。 NH ... Cl2M(合成子 A )的罕见折叠构象在 7 中形成。 NH或OH供体以及随后的NH ... Cl氢键网络分支导致一维,二维和三维结构。这些结构通过CH ... O和CH ... Cl以及p ... p堆积相互作用进一步稳定。

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