Manganese(II/II/II) and manganese(III/II/III) trinuclear compounds. Structure and solid and solution behavior
Φόρτωση...
Ημερομηνία
Συγγραφείς
Tangoulis, V.
Malamatari, D. A.
Soulti, K.
Stergiou, V.
Raptopoulou, C. P.
Terzis, A.
Kabanos, T. A.
Kessissoglou, D. P.
Τίτλος Εφημερίδας
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Τίτλος τόμου
Εκδότης
American Chemical Society
Περίληψη
Τύπος
Είδος δημοσίευσης σε συνέδριο
Είδος περιοδικού
peer reviewed
Είδος εκπαιδευτικού υλικού
Όνομα συνεδρίου
Όνομα περιοδικού
Inorg Chem
Όνομα βιβλίου
Σειρά βιβλίου
Έκδοση βιβλίου
Συμπληρωματικός/δευτερεύων τίτλος
Περιγραφή
Two mixed-valence (MnMnII)-Mn-III complexes and a home-valence Mn-II trinuclear manganese complex of stoichiometry (MnMnMnIII)-Mn-III-Mn-II(5-Cl-Hsaladhp)(2)(AcO)(4)(MeOH)(2) . 4CH(3)OH (1a), (MnMnMnIII)-Mn-III-Mn-II (Hsaladhp)(2)(AcO)(2)(5-Cl-Sal)(2)-(thf)(2) (3a) and (MnMnMnII)-Mn-II-Mn-II (AcO)(6)(pybim)(2) (1b) where H(3)saladhp is a tridentate Schiff base ligand and pybim a neutral bidentate donor ligand, have been structurally characterized by using X-ray crystallography. The structurally characterized mixed-valence complexes have strictly 180 degrees Mn-III-Mn-II-Mn-III angles as required by crystallographic inversion symmetry. The complexes are valence trapped with two terminal Mn-III ions showing Jahn-Teller distortion along the acetate or salicylate-Mn-III-X axis. The Mn ... Mn separation is 3.511 Angstrom and 3.507 Angstrom respectively. The mixed-valence complexes have S = 3/2 ground state and the homovalence complex S = 5/2, With Small antiferromagnetic exchange J couplings, -5.6 and -1.8 cm(-1), respectively, while the powder ESR spectra at 4 K show a broad low field signal with g approximate to 4.3 for (MnMnMnIII)-Mn-III-Mn-II and a broad temperature-dependent signal at g = 2 for (MnMnMnII)-Mn-II-Mn-II. Crystal data for 1a: [C36H60O20N2Cl2Mn3], triclinic, space group P (1) over bar, a = 9.272(7) Angstrom, b = 11.046(8) Angstrom, c = 12.635(9) Angstrom, alpha = 76.78(2)degrees, beta = 81.84(2)degrees, gamma = 85.90(2)degrees, Z = 1. Crystal data for 3a: [C48H56O18N2Cl2Mn3], monoclinic, space group P2(1)/n, a = 8.776(3) Angstrom, b = 22.182(7) Angstrom, c = 13.575(4) Angstrom, beta = 94.44(1)degrees, Z = 2. Crystal data for 1b: [C36H36O12N6Mn3], triclinic, space group P (1) over bar, a = 13.345(6) Angstrom, b = 8.514(4) Angstrom, c = 9.494(4) Angstrom, alpha = 75.48(1)degrees, beta = 75.83(1)degrees, gamma = 76.42(1)degrees, Z = 1.
Περιγραφή
Λέξεις-κλειδιά
oxygen-evolving complex, ray absorption-spectroscopy, zinc carboxylate complexes, base polymeric complex, photosystem-ii, crystal-structure, magnetic-properties, manganese complex, repeat unit, multiline
Θεματική κατηγορία
Παραπομπή
Σύνδεσμος
<Go to ISI>://A1996VC19700025
http://pubs.acs.org/doi/pdfplus/10.1021/ic960183j
http://pubs.acs.org/doi/pdfplus/10.1021/ic960183j
Γλώσσα
en
Εκδίδον τμήμα/τομέας
Όνομα επιβλέποντος
Εξεταστική επιτροπή
Γενική Περιγραφή / Σχόλια
Ίδρυμα και Σχολή/Τμήμα του υποβάλλοντος
Πανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Χημείας