dc.contributor.author | Tasiopoulos, Anastasios J. | en |
dc.contributor.author | Milligan Jr., P. L. | en |
dc.contributor.author | Abboud, K. A. | en |
dc.contributor.author | O'Brien, T. A. | en |
dc.contributor.author | Christou, George | en |
dc.creator | Tasiopoulos, Anastasios J. | en |
dc.creator | Milligan Jr., P. L. | en |
dc.creator | Abboud, K. A. | en |
dc.creator | O'Brien, T. A. | en |
dc.creator | Christou, George | en |
dc.date.accessioned | 2019-11-21T06:23:07Z | |
dc.date.available | 2019-11-21T06:23:07Z | |
dc.date.issued | 2007 | |
dc.identifier.uri | http://gnosis.library.ucy.ac.cy/handle/7/56190 | |
dc.description.abstract | The syntheses of the first mixed-metal CeIVMnIV complexes are reported. [CeMn2O3(O2CMe)(NO 3)4(H2O)2(bpy)2]-(NO 3) (1 | en |
dc.description.abstract | bpy = 2,2′-bipyridine) was obtained from the reaction of Mn(NO3)2·xH2O and bpy with (NH 4)2Ce(NO3)6 in a 1:1:2 molar ratio in 25% aqueous acetic acid. The complexes [CeMn6O9(O 2CR)9(X)(H2O)2]y+ (R = Me, X = NO3-, y = 0 (2) | en |
dc.description.abstract | R = Me, X = MeOH, y = +1 (3) | en |
dc.description.abstract | R = Et, X = NO3-, y = 0 (7)) were obtained from reactions involving a [Mn(O2CR)2]·4H2O/Ce IV ratio of ∼1:1.5 in concentrated aqueous carboxylic acid. A related reaction in less-concentrated aqueous acetic acid and in the presence of L (where L = 2-hydroxy-6-methylpyridine (mhpH), 2-pyrrolidinone (pyroH), or pyridine (py)) gave [Ce3Mn2O6(O 2CMe)6(NO3)2(L)a(H 2O)b] (L = mhpH, a = 4, b = 0 (4) | en |
dc.description.abstract | L = pyroH, a = 2, b = 3 (5)) and {{(pyH)3[Ce3Mn2O6(O 2CMe)7.5(NO3)3]·(HO 2CMe)0.5·(H2O)2} 2(NO3)}n (6), respectively. Solid-state magnetic susceptibility (χM) data for compounds 1, , and 5 were fit to the theoretical χMT versus T expression for a Mn IV2 complex derived using the isotropic Heisenberg spin Hamiltonian (H = -2JŜ1Ŝ2) and the Van Vleck equation. The obtained fit parameters were (in the format J, g) 1, -45.7(3) cm-1, 1.95(5) | en |
dc.description.abstract | 4, -0.40(10) cm-1, 2.0(1) | en |
dc.description.abstract | and 5, -0.34(10) cm-1, 2.0(1), where J is the exchange interaction constant between the two MnIV ions. The data for compound 3 were fit by a matrix diagonalization method that gave J1 = -5.8 cm-1, J 2 = -0.63 cm-1, J3 ≈ 0, and g = 2.0(1), where J1 and J2 are the exchange interactions for the [MnIV2O2(O2-CMe)] and [Mn IV2O(O2CMe)2] units, respectively, and J3 for a uniform next-nearest-neighbor interaction. Theoretical estimates of the exchange constants in compounds 1 and 3 obtained with the ZILSH method were in excellent and good agreement, respectively, with the values obtained from fits of the magnetization data. The difference for 3 is assigned to the presence of the Ce4+ ion, and atomic bond indices obtained from the ZILSH calculations were used to rationalize the values of the various exchange constants based on metal-ligand bond strengths. © 2007 American Chemical Society. | en |
dc.source | Inorganic chemistry | en |
dc.source.uri | https://www.scopus.com/inward/record.uri?eid=2-s2.0-36349027993&doi=10.1021%2fic700994p&partnerID=40&md5=178e06c36a1138bcdb66ca7c25d23192 | |
dc.subject | article | en |
dc.subject | chemistry | en |
dc.subject | transition element | en |
dc.subject | chemical structure | en |
dc.subject | infrared spectrophotometry | en |
dc.subject | oxidation reduction reaction | en |
dc.subject | Oxidation-Reduction | en |
dc.subject | X ray crystallography | en |
dc.subject | manganese | en |
dc.subject | Models, Molecular | en |
dc.subject | Crystallography, X-Ray | en |
dc.subject | cerium | en |
dc.subject | Spectrophotometry, Infrared | en |
dc.subject | lanthanide | en |
dc.subject | Lanthanoid Series Elements | en |
dc.subject | Transition Elements | en |
dc.title | Mixed transition metal-lanthanide complexes at high oxidation states: Heteronuclear CeIVMnIV clusters | en |
dc.type | info:eu-repo/semantics/article | |
dc.identifier.doi | 10.1021/ic700994p | |
dc.description.volume | 46 | |
dc.description.issue | 23 | |
dc.description.startingpage | 9678 | |
dc.description.endingpage | 9691 | |
dc.author.faculty | 002 Σχολή Θετικών και Εφαρμοσμένων Επιστημών / Faculty of Pure and Applied Sciences | |
dc.author.department | Τμήμα Χημείας / Department of Chemistry | |
dc.type.uhtype | Article | en |
dc.description.notes | <p>Cited By :47</p> | en |
dc.source.abbreviation | Inorg.Chem. | en |
dc.contributor.orcid | Tasiopoulos, Anastasios J. [0000-0002-4804-3822] | |
dc.gnosis.orcid | 0000-0002-4804-3822 | |