Manganese chemistry and oxygen evolving centre of photosystem II. Linear pentadentate Schiff base ligands afford a variety of manganese complexes with unusual structures and properties.

Mabad, B.; Luneau, Dominique; Theil, S.; Dahan, Françoise; Savariault, Jean‐Michel; Tuchagues, Jean‐Pierre

doi:10.1016/0162-0134(91)84359-h

Cited by 7 publications

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“…An increasing trend of the μ eff value with the lowering of the temperature in the range from 100 to 25 K was observed, showing the similar ferromagnetic exchange interaction to that observed in complex 4 . The relationship of the magnetic properties with the structure of the paramagnetic sites has been discussed in ref for a series of dinuclear Mn(III) compounds involving a similar Mn 2 (μ-O) 2 bridging unit, of which a complex [Mn(3-CH 3 O-salen)Cl] 2 20b was reported to have J = 0.33 cm -1 being consistent with the J ‘ value of 0.329 cm -1 for complex 4 .…”

Section: Resultsmentioning

confidence: 77%

Aggregate Manganese Schiff Base Moieties by Terephthalate or Acetate: Dinuclear Manganese and Trinuclear Mixed Metal Mn₂/Na Complexes

et al. 2003

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A reaction system consisting of terephthalic acid, NaOH, inorganic Mn(II) or Mn(III) salt, and salicylidene alkylimine resulted in dinuclear manganese complexes (salpn)(2)Mn(2)(mu-phth)(CH(3)OH)(2) (1, salpn = N,N'-1,3-propylene-bis(salicylideneiminato); phth = terephthalate dianion), (salen)(2)Mn(2)(mu-phth)(CH(3)OH)(2) (2, salen = N,N'-ethylene-bis(salicylideneiminato)), (salen)(2)Mn(2)(mu-phth)(CH(3)OH)(H(2)O) (3), and (salen)(2)Mn(2)(mu-phth) (4), while the absence of NaOH in the reaction led to a mononuclear Mn complex (salph)Mn(CH(3)OH)(NO(3)) (5, salph = N,N'-1,2-phenylene-bis(salicylideneiminato)). In addition, a trinuclear mixed metal complex H[Mn(2)Na(salpn)(2)(mu-OAc)(2)(H(2)O)(2)](OAc)(2) (6) was obtained from the reaction system by using maleic acid instead of terephthalic acid. Five-coordinate Mn ions were found in 4 giving rise to an intermolecular interaction and constructing a one-dimensional linear structure. Antiferromagnetic exchange interactions were observed for 1-3, and a total ferromagnetic exchange of 4 was considered to stem from intermolecular magnetic coupling. (1)H NMR signals of phenolate ring and alkylene (or phenylene) backbone of the diamine are similar to those reported in the literature, and the phth protons are at -2.3 to -10.1 ppm. Studies on structure, bond valence sum analysis, and magnetic properties indicate the oxidation states of the Mn ions in 6 to be +3, which are also indicated by ESR spectra in dual mode. Ferromagnetic exchange interaction between the Mn(III) sites was observed with J = 1.74 cm(-1). A quasireversible redox pair at -0.29V/-0.12V has been assigned to the redox of Mn(2)(III)/Mn(III)Mn(II), implying the intactness of the complex backbone in solution.

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Section: Resultsmentioning

confidence: 77%

Aggregate Manganese Schiff Base Moieties by Terephthalate or Acetate: Dinuclear Manganese and Trinuclear Mixed Metal Mn₂/Na Complexes

et al. 2003

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Antiferromagnetic interactions through phenoxo bridges and lattice water: Synthesis, structure, and magnetic properties of new Mn(III) Schiff base complexes in combination with thiocyanate ligand

Bhargavi

Rajasekharan

Tuchagues

2009

Inorganica Chimica Acta

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Magneto-structural correlation and low temperature heat capacity of a Mn (III) quadridentate Schiff-base coordination compound

Chen

Shi

Xia

et al. 2014

The Journal of Chemical Thermodynamics

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Manganese chemistry and oxygen evolving centre of photosystem II. Linear pentadentate Schiff base ligands afford a variety of manganese complexes with unusual structures and properties.

Cited by 7 publications

References 0 publications

Aggregate Manganese Schiff Base Moieties by Terephthalate or Acetate: Dinuclear Manganese and Trinuclear Mixed Metal Mn₂/Na Complexes

Aggregate Manganese Schiff Base Moieties by Terephthalate or Acetate: Dinuclear Manganese and Trinuclear Mixed Metal Mn₂/Na Complexes

Antiferromagnetic interactions through phenoxo bridges and lattice water: Synthesis, structure, and magnetic properties of new Mn(III) Schiff base complexes in combination with thiocyanate ligand

Magneto-structural correlation and low temperature heat capacity of a Mn (III) quadridentate Schiff-base coordination compound

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Manganese chemistry and oxygen evolving centre of photosystem II. Linear pentadentate Schiff base ligands afford a variety of manganese complexes with unusual structures and properties.

Cited by 7 publications

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Aggregate Manganese Schiff Base Moieties by Terephthalate or Acetate: Dinuclear Manganese and Trinuclear Mixed Metal Mn2/Na Complexes

Aggregate Manganese Schiff Base Moieties by Terephthalate or Acetate: Dinuclear Manganese and Trinuclear Mixed Metal Mn2/Na Complexes

Antiferromagnetic interactions through phenoxo bridges and lattice water: Synthesis, structure, and magnetic properties of new Mn(III) Schiff base complexes in combination with thiocyanate ligand

Magneto-structural correlation and low temperature heat capacity of a Mn (III) quadridentate Schiff-base coordination compound

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Aggregate Manganese Schiff Base Moieties by Terephthalate or Acetate: Dinuclear Manganese and Trinuclear Mixed Metal Mn₂/Na Complexes

Aggregate Manganese Schiff Base Moieties by Terephthalate or Acetate: Dinuclear Manganese and Trinuclear Mixed Metal Mn₂/Na Complexes