Coordinate Valency Rings. XXIV. On Some Inner Complex Ferric Salts of Hydrosalicylamide and its Derivatives

Binuclear iron system ferromagnetic in three oxidation states: synthesis, structures, and electronic aspects of molecules with a Fe2(OR)2 bridge unit containing Fe(III,III), Fe(III,II), and Fe(II,II)

“…Preparation and Properties of [Fe2(salmp)2]0'1'2". In the report of the preparation of the Fe(III) complex with salmp in I960, 29 it was stated that a quantitative yield of the product Fe(salmp) could be obtained by the reaction of ligand 4 with FeCl3 in hot ethanol. We have been unable to reproduce that result but have found that inclusion of base as in reaction 1 permits isolation in 68% yield of the product as a brown solid which has the binuclear formulation Fe2(salmp)2, proven by X-ray crystallography.…”

Selective Formation, Reactivity, Redox and Magnetic Properties of MnIII and FeIII Dinuclear Complexes with Shortened Salen-Type Schiff Base Ligands

“…This compound was obtained by modification of a literature procedures [ 3 , 8 , 23 , 28 ]. Solid FeCl 3 (168.8 mg, 1.04 mmol) was added to a solution of H 3 salmp (358.2 mg, 1.03 mmol) in MeOH (15 mL) and Et 3 N (1.5 mL) and the mixture was stirred at room temperature for 6 h. The brown-red solid formed was filtered, washed with MeOH, i Pr 2 O and dried under vacuum.…”

“…H 2 salben’s derive from H 3 salmp via substitution of the central salH moiety by reaction with variably substituted benzaldehydes [ 4 ], while H 2 salmen can be obtained by reaction of salH with either methanediamine [ 5 ], formaldehyde and ammonia [ 6 ] or hexamethylenetetramine [ 7 ]. Even if some reports indicate mononuclear complexes with a metal:ligand (M:L) 1:1 ratio [ 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 ] as H 2 salen [ 18 ], such shortened ligands preferentially form oligonuclear metal complexes [ 19 , 20 ] due to the tension of the four-membered MNCN metallacycle in a hypothetic mononuclear compound. To the best of our knowledge, there is only one reported X-ray structure in which the two iminic nitrogen atoms coordinate to the same metal ion, (Zr(Hsalmp) 2 ) [ 21 ].…”

Near‐stoichiometric O2 binding on metal centers in Co(salen) nanoparticles

“…Much of the work on O 2 ‐binding transition metal complexes has been guided by attempts to mimic biological O 2 ‐carriers, as outlined in several articles 1–4. Cobaltous bis(salicylaldehyde)ethylenediamine (Co(salen)) and its derivatives are one class of complexes that have been extensively studied for their ability to reversibly bind O 2 5–7. Co(salen) is the first reported synthetic reversible Co(II) oxygen carrier to bind O 2 in the solid state, and it is believed that the O 2 adduct consists of dimeric [Co(salen)] 2 O 2 units 8, 9.…”