Electrochemical synthesis and structural characterisation of transition metal complexes with 2,6-bis(1-salicyloylhydrazonoethyl)pyridine, H4daps

Crystallisation Solvent Influence on the Crystal Structures of MnII and NiII Complexes with 2,6-bis(1-salicyloylhydrazonoethyl)pyridine, H4daps

“…Mn(H 2 daps)(H 2 O) 0.5 and Ni(H 2 daps)(H 2 O) 1.5 (CH 3 CN) have been prepared by means of an electrochemical synthesis, as previously reported [16,17]. The electrochemical efficiency of the cell is close to 0.5 molF ±1 in both cases, which is in accordance with the following mechanism for the reaction: …”

“…Slow evaporation of a dichloromethane solution of Ni(H 2 daps)(H 2 O) 1.5 (CH 3 CN) yields [Ni 2 (H 2 daps) 2 ]´CH 2 Cl 2 4, the structure of which has previously been reported by us [16]. It is a binuclear complex with a distorted octahedral environment around the Ni atoms.…”

“…Thus, we tried to react 4 with pyridine in order to obtain the mononuclear [Ni(H 2 daps)(py) 2 ] complex. However, this attempt was unsuccessful and we obtained a different binuclear helical Ni complex, [Ni 2 (H 2 daps) 2 (py) 2 ]´CH 2 Cl 2 6, that we have previously reported [16]. The structure of this compound could be rationalised by breaking the pyridine bridges in complex 4 (Scheme 1).…”

“…We have recently characterised one manganese and two dinickel complexes containing H 4 daps in its dianionic form [16]. We have found that the manganese complex is a mononuclear compound when it is recrystallised in a donor solvent, such as pyridine.…”

Self‐Assembly of Dimeric MnIII–Schiff‐Base Complexes Tuned by Perchlorate Anions

“…[1,2] The self-assembly of metal-organic frameworks is highly influenced by factors such as the geometric requirements of metal ions, [3,4] the ligand design, [5,6] the solvents used for crystallisation [7] or the selection of the counteranions. [8] Understanding the role of these factors may extend our knowledge of the relevant structural types and establishes proper synthetic strategies that lead to the desired species with predictable structures and properties.…”