Selective Separation of Aliphatic Nitriles by Employing a Two‐Dimensional Interdigitated Coordination Polymer

Abstract

A room-temperature slow diffusion reaction of the metal nitrates [M=Zn and Co ] with 5-azido isophthalic acid (AIPA) and 1,4-bis(4-pyridyl)-2,3-diaza-1,3-butadiene (BPDB) resulted in a new two-dimensional interdigitated coordination polymer, [M(C H N O )(C H N )]⋅DMF [DMF=dimethyl formamide (C H NO)]. The non-bonded DMF molecules were found to exchange through a single-crystal to single-crystal (SCSC) fashion with many aliphatic nitrile compounds. More importantly, the present compound, I⋅DMF(Zn) appears to absorb cis-crotononitrile selectively from the cis/trans mixture as well as a mixture containing the structural isomer (allylnitrile). It also preferentially absorbs propionitrile from an equimolar mixture of acetonitrile, propionitrile, and butyronitrile (1:2:1). The cobalt compound exhibits anti-ferromagnetic behavior.

Friedländer, Knoevenagel, and Michael Reactions Employing the Same MOF: Synthesis, Structure, and Heterogeneous Catalytic Studies of ([Zn(1,4-NDCA)(3-BPDB)0.5]·(DMF)(MeOH) and [Cd4(1,4-NDCA)4(3-BPDB)4]·2(DMF)

“…Room-temperature (RT) IR spectroscopic studies were performed in the range of 400–4000 cm –1 by using KBr pellets, which exhibited characteristic bands. The peak near 1100–1250 cm –1 could be due to the presence of −CN– of the BPDB ligand. − An intense peak at ∼1700–1650 and 1650–1600 cm –1 represents the CO stretching of the −COO group present in the naphthalene dicarboxylate ligand in compound I and compound II , respectively (Supporting Information, Figure S2). For compound I , the IR bands at 2960 and 2910 could be due to the asymmetric and symmetric stretching of methyl group (−C–H) present in DMF.…”

New Bifunctional Metal–Organic Frameworks and Their Utilization in One-Pot Tandem Catalytic Reactions

“…47 The strong band near ∼1610 cm −1 in II could be assigned to the presence of the azine group (-CN-) of the BPDB ligand. 48,49 A sharp band at ∼1646 cm −1 (I) and 1640 cm −1 (II) is for the CO stretch of DMF 50 and a band at around 3540 −1 (I) could be for the OH stretch of MeOH.…”

C−C Coupling of Aryl Chlorides and Reduction of Nitroarenes to Amines Employing Recyclable Heterogeneous Green Catalysts

“…This suggests that there is a considerable orbital contribution for both Co 2 + spins, which is well established in many cobalt containing compounds. [18] The χ m T value decreases exponentially to reach a value of 1.47 emu mol À 1 at 4.2 K. The 1/χ m -T was fitted for the Curie-Weiss law in the temperature range 100-300 K. The fit gave a Curie constant (C) of 3.3 emu mol À 1 and a Weiss constant (θ) of À 18.7 K. The negative value of θ suggests the interactions between the Co 2 + ions in 1 are predominantly anti-ferromagnetic in nature. Similar magnetic behaviour has been observed in many cobalt containing MOFs.…”