A Novel Five-Connected BN Topological Network Metal−Organic Framework Mn(II) Cluster Complex

Abstract

Hydrothermal reaction of MnCl2·4H2O with H3PTC (PTC = pyridine-2,4,6-tricarboxylate) yields a novel three-dimensional manganese(II) coordination polymer, [Mn2(OH)(H2O)(PTC)] (1), constructed by Mn4 clusters and PTC linkers. Compound 1 displays five-connected BN topology, and there exists weak antiferromagnetic exchange interactions between the manganese(II) ions with g = 2.02, J wb/k = −0.96 K, and J bb/k = −1.07 K.

Varying the frameworks of coordination polymers with (CuI)4 cubane cluster by altering terminal groups of thioether ligands

“…4c) [22]. Although a large number of examples of threeor four-connected networks based on d-block metal ions have been reported, five-connected networks are still rare [25,26]. The present net is the first case of Cu 4 I 4 complexes with such a five-connected topology.…”

A novel 44.66 5-connected metal-organic framework with strong fluorescent emission constructed by m-thioacetatebenzoic acid

“…The vertex symbol calculation using OLEX gives (4.4.4.4.6.6 5 .6 5 .6 3 .6.6 5 ) for the 5-connected node. Structures containing 5-connected metal centers are very rare, and only several examples of frameworks with 3D 5-connected networks have been reported to date [35][36][37][38]. The net reported here is based on the square pyramidal nodes, and it is obviously different from heterobimetallic network Fig.…”

An interdigitated 3D framework with 5-connected BN topology

“…3b). In contrast to the extensive investigations on 3-, 4-, 6-, 8-connected 3D coordination networks [4], there have been only a few on 5-connected BN topology [6][7][8][9][10][11][12]. To the best of our knowledge, the compound 1 is the first example of 3D interdigitated coordination network with interesting 5-connected BN topology involving both covalent and strong hydrogen bonds.…”

“…However, the rational design and controlled syntheses of novel coordination frameworks with unusual topologies are still challenging topics. For example, the 5-connected coordination networks, especially 5-connected BN net, are relatively rare [6][7][8][9][10][11][12]. The 5-connected BN (or bnn) net may be described as cross-linked (6,3) honeycomb network based on the trigonal bipyramidal node with the Schläfli symbol 4 6 ⋅6 4 .…”