title: Synthesis and Structural Characterization of [Mn(ethyl isonicotinate)(2)(N(3))(2)](n)(), a Two-Dimensional Alternating Ferromagnetic-Antiferromagnetic Compound. Magnetostructural Correlations for the End-to-End Pseudohalide-Manganese System.
abstract: Three compounds with formula [Mn(L)(2)(N(3))(2)](n)(), in which L is 4-acpy = 4-acetylpyridine (1), Etinc = ethyl isonicotinate (2), and py = pyridine (3), have been studied from the magnetic point of view. The new compound [Mn(L)(2)(N(3))(2)](n)() (2) crystallizes in the monoclinic system, space group P2(1)/a (No. 14), formula [C(16)H(18)MnN(8)O(4)], with a = 15.176(5) Å, b = 9.060(3) Å, c = 15.760(6) Å, beta = 111.62(3) degrees, and Z = 4. Compounds 1 and 2 are two-dimensional systems, whereas 3 is a 3-D compound. Compound 2 shows ferromagnetic Mn(2)(N(3))(2) dimeric entities linked antiferromagnetically to the four neighboring dimeric entities by four end-to-end azido bridges, leading to an alternate ferromagnetic-antiferromagnetic two-dimensional compound. MO calculations have been performed to study the superexchange pathway for the manganese 1,3-azido system.
authors.affiliation: Departament de Química Inorgànica, Universitat de Barcelona, Diagonal 647, 08028 Barcelona, Spain, Department of Chemistry, Faculty of Science, Alexandria University, Alexandria 21321, Egypt, and Institut für Physikalische und Theoretische Chemie, Technische Universität Graz, A-8010 Graz, Austria.
authors.forename: Albert
authors.initials: A
authors.lastname: Escuer
authors.forename: Ramon
authors.initials: R
authors.lastname: Vicente
authors.forename: Mohamed A. S.
authors.initials: MA
authors.lastname: Goher
authors.forename: Franz A.
authors.initials: FA
authors.lastname: Mautner