Nitranilic acid as a basis for construction of coordination polymers: from discrete monomers to 3D networks

Abstract

Six novel transition metal complexes of nitranilic acid, a highly versatile ligand, were studied. Topologies of coordination polymers ranging from 0D (discrete monomers) to 3D were observed.

Heteroleptic LaIII Anilate/Dicarboxylate Based Neutral 3D-Coordination Polymers

“…At the same time, the inverse ratio of the reagents leads to a 3D framework. The dianionic form of anilate ligands can bind to metals either as a bridging (bis)bidentate ligand, which has a dianion-like structure (Scheme 3, type I and II), or as a terminal bidentate ligand with an ortho-quinoid structure (type III) [41,42] The dianionic form of anilate ligands can bind to metals either as a bridging (bis)bidentate ligand, which has a dianion-like structure (Scheme 3, type I and II), or as a terminal bidentate ligand with an ortho-quinoid structure (type III) [41,42] Ligands BDC 2− in 1 and 3 or DHBDC 2-in 2 adopted bridging mode, linking four La 3+ ions. The types of bridging are shown in Scheme 4.…”

“…Selected bond lengths are presented in Table 1. The dianionic form of anilate ligands can bind to metals either as a bridging (bis)bidentate ligand, which has a dianion-like structure (Scheme 3, type I and II), or as a terminal bidentate ligand with an ortho-quinoid structure (type III) [41,42] Ligands BDC 2− in 1 and 3 or DHBDC 2-in 2 adopted bridging mode, linking four La 3+ ions. The types of bridging are shown in Scheme 4.…”

“…The dianionic form of anilate ligands can bind to metals either as a bridging (bis)bidentate ligand, which has a dianion-like structure ( Scheme 3 , type I and II), or as a terminal bidentate ligand with an ortho-quinoid structure (type III) [ 41 , 42 ]. The dianions of 2,5-dihydroxy-3,6-di-tert-butyl-para-quinone in 1 – 2 and chloranilic acid in 3 consist of two delocalized π-electron systems connected by single C-C bonds (1.552(3) Å).…”

An unusual intermolecular interaction between a lone pair and an electron-rich π-electron system of a quinoid dianion

“…Bond lengths in the DHQ dianion (Table S3) are in good agreement with its other alkali salts, confirming the structure shown in Scheme . Several substituted 2,5-dihydroxyquinones also have two delocalized π-systems separated by two single C–C bonds: the 3,6-dichloro analogue (chloranilate dianion, CA ), ,− the 3,6-dibromo analogue (bromanilate dianion, BA ), the 3,6-dinitro analogue (nitranilate dianion, NA ), , and the 3-cyano-6-chloro analogue …”

Glycols in the Synthesis of Zinc-Anilato Coordination Polymers

“…It has a direct effect on the properties of MOFs based on them [22]. In this regard, the study of new ancillary ligands with various substituents in the quinoid ring is one of the promising tasks for expanding the range of properties of redox-active MOFs [4,23,24]. The study of 2,5-dihydroxy-3,6-di-tert-butyl-para-quinone (H 2 pQ) [25] as a ditopic ligand in the synthesis of metal-organic frameworks started recently [26][27][28].…”