Synthesis, Crystal and Network Structures, and Magnetic Properties of a Hybrid Layered Compound: [K(18-cr)(2-PrOH)2][{Mn(acacen)}2{Fe(CN)6}] (18-cr = 18-Crown-6-ether, acacen = N,N′-Ethylenebis(acetylacetonylideneiminate))

Hitoshi Miyasaka, Hisashi Okawa, Akira Miyazaki, Toshiaki Enoki

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83 Citations (Scopus)

Abstract

A hybrid layered compound [{K(18-cr)(2-PrOH)2}{Mn(acacen)}2{Fe(CN)6}] has been prepared by the reaction of [Mn(acacen)(Cl)] with [K(18-cr)(H2O)2]3[Fe(CN) 6]·3H2O in an ethanol/2-propanol mixed solvent (18-cr = 18-crown-6-ether, acacen = N,N'-ethylenebis(acetylacetonylideneiminate)). It crystallizes in the monoclinic space group P21/a with cell dimensions of a = 13.272(3) Å, b = 15.768 (2) Å, c = 14.771(2) Å, β= 105.64(1)°, Z = 2. It assumes a hybrid layered structure of alternating arrays of two types of layers. One of the layers is formed by the anionic part [{Mn(acacen)}2{Fe(CN)6}]nn-, where [Fe(CN)6]3- coordinates through its four cyanide groups on a plane to the axial sites of four [Mn(acacen)]+ entities. The two-dimensional layer consists of the cyclic octamer [-Mn-NC-Fe-CN-]4 having the Fe ions at the corners and the Mn ions on the edges of a deformed square. Another layer is formed by the cationic part [K(18-cr)(2-PrOH)2]+ that has a hexagonal-bipyramidal geometry about the metal with two 2-PrOH molecules at the apexes of the nearly planar [K(18-cr)]+. The anionic and cationic layers are combined by the hydrogen bond between the cyanide groups (free from coordination) of the anionic layer and the 2-propanol groups of the cationic layer with bond distance of N⋯O = 2.861(5) Å, Magnetic studies (magnetic susceptibility vs T, field-cooled magnetization vs T, saturation magnetization vs H) indicate that the compound is a metamagnet with a Néel temperature TN = 5.0 K, showing the onset of ferromagnetic ordering within the anionic layer and an antiferromagnetic interlayer interaction. Magnetization as a function of the applied magnetic field indicates a spin-flipping from antiferromagnetic arrangement to ferromagnetic arrangement between the layers around 1200 Oe and exhibits hysteresis behavior.

Original languageEnglish
Pages (from-to)4878-4883
Number of pages6
JournalInorganic chemistry
Volume37
Issue number19
DOIs
Publication statusPublished - 1998 Jan 1
Externally publishedYes

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry

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