3-(4-Pyridyl)-2,4-pentanedione – a bridge between coordinative, halogen, and hydrogen bonds
作者:Carina Merkens、Fangfang Pan、Ulli Englert
DOI:10.1039/c3ce41306c
日期:——
4-pentanedionate, an established ditopic ligand for metal complexes, offers additional interaction modes which may be exploited for crystal engineering: we have assembled structures in which halogen bonds coexist with coordinative and hydrogen bonds. An adduct of the neutral 3-(4-pyridyl)-2,4-pentanedione to tetrafluorodiiodobenzene proves the suitability of the pyridine N as a nucleophile in halogen bonds. This
A Nanoporous Ag−Fe Mixed-Metal−Organic Framework Exhibiting Single-Crystal-to-Single-Crystal Transformations upon Guest Exchange
作者:Yixun Zhang、Banglin Chen、Frank R. Fronczek、Andrew W. Maverick
DOI:10.1021/ic800183v
日期:2008.6.2
The reaction of solutions of Fe(Pyac)(3) [PyacH = 3-(4-pyridyl)2,4-pentanedione] and AgNO3 produces two types of porous mixed-metal-organic frameworks (M'MOFs). With lower AgNO3 concentrations, the product (M'MOF1) has a 2D honeycomb structure with Ag:Fe = 1:1 and pores of ca. 12 x 16 angstrom. When a higher concentration of AgNO3 is employed, however, the product (M'MOF2) has Ag:Fe = 3:2 and a porous 1 D ladder structure. A variety of nonpolar solvents serve as guests in M'MOF2: with 1,2-6H4Cl2, [AgNO3](3)[Fe(Pyac)(3)](2)(1,2-C6H4Cl2)(5.5) (M'MOF2a); with C6H5Br, [AgNO3](3)[Fe(Pyac)(3)](2)(C6H5Br)(6) (M'MOF2b). M'MOFs 2a and 2b can be interconverted by treatment with the appropriate solvent, in single-crystal-to-single-crystal transformations.