Crystal Engineering with Ferrocene Compounds

Coordination Behaviour of 1-(4,2′:6′,4′′-terpyridin-4′-yl)ferrocene and 1-(3,2′:6′,3′′-terpyridin-4′-yl)ferrocene: Predictable and Unpredictable Assembly Algorithms

“…[11] On the one hand, the conformational flexibility of the ferrocenyl unit through independent rotation of the Cp rings about the iron atom "ball-bearing" endows 1,1'-substituted ferrocenes with a degree of freedom facilitating the assembly of diverse architectures. [12,13,14] However, this rotational freedom, whilst permitting access to a broad conformational space also reduces the preorganization of the assembly process, making structural engineering design less form both discrete complexes [15] and coordination polymers [16] with a range of metal ions. An alternative approach is the design of N-heterocyclic ligands suited to coordination polymer assembly by covalently attaching one or more divergent multinucleating donor sets to the ferrocenyl core.…”

Design, Preparation and Characterization of the Adducts of the Bis‐Amido Cobalticinium Complex [CoIII(η5‐C5H4CONHC5H4N)2][PF6] with Fumaric and Maleic Acids

“…[16] With the present work we intended to extend these findings to a new class of supramolecular synthons, namely that of cationic bis-amido complexes, of which [Co III (η 5 -C 5 H 4 CONHC 5 H 4 N) 2 ] + is the prototype. [17] In the course of this investigation we have shown that both fumaric and maleic acids are sufficiently strong as to protonate the pyridine moiety. However, in the case of maleic acid, formation of the intramolecular hydrogen bond yields compounds that contain only the hydrogen maleate monoanion, while in the case of fumaric acid, both the completely deprotonated fumarate dianion and the supramolecular trianion formed by one hydrogen fumarate mono-anion and one fumarate dianion were obtained.…”

Coordination chemistry of 3- and 4-mercaptobenzoate ligands: Versatile hydrogen-bonding isomers of the thiosalicylate (2-mercaptobenzoate) ligand

“…Carboxylic acids are well-known to form hydrogen-bonded dimers in the solid-state. [2,3] As a result, the carboxylic acid group is well established as a versatile functionality in supramolecular chemistry, and a wide variety of hydrogen-bonded networks have been described based on coordination compounds [4,5,6] as well as organometallic [7,8,9,10] compounds. Additional interest in 3MBA and 4MBA ligands Scheme 3…”