Two-dimensional magnetic systems. Structural and magnetic characterization of bis(propylene-1,3-diammonium) tetrachlorocuprate(II)

The Frequency Dependence of the Conductivity and Dielectric Relaxation of [(CH2)3(NH3)2]Cu(II)Cl4

“…The diffraction lines correspond to the orthorhombic space group Pnma with the lattice spacing: a = 7.20Å, b = 18.247Å and c = 7.451Å. They agree with the results of Phelps et al [13]. • C/min.…”

“…Thus it is of interest to investigate the phase changes of [(CH 2 ) 3 (NH 3 ) 2 ]CuCl 4 . X-ray investigation of this compound has indicated that it is isomorphous with the corresponding Cd salt, and that it crystallizes in the orthorhombic space group Pnma with four formula units in a cell of the dimensions a = 7.200(2)Å, b = 18.247(7)Å and c = 7.451(2)Å [13]. The structure consists of tetragonally distorted [CuCl 4 ] 2− units which are chloro-bridged to form two-dimensional layers.…”

On the Structural Phase Transition in a Perovskite-Type Diaminopropanetetrachlorocuprate(II) NH3(CH2)3NH3CuCl4 Crystal

“…Two structural phase transitions were found at 305 K and 337 K in [NH 3 (CH 2 ) 3 NH 3 ]MnCl 4 [6]. The [NH 3 (CH 2 ) 3 NH 3 ]CuCl 4 (abbreviated as DAPCCl) crystal is orthorhombic [7,8] and isomorphous with [NH 3 (CH 2 ) 3 NH 3 ]CdCl 4 at the room temperature phase [1]. Two successive phase transitions are proposed to appear at 334 K and 433 K [8] and the transition at 433 K is regarded as irreversible.…”

Structures of four- and five-carbon alkyldiammonium tetrachlorocuprate(II) and tetrabromocuprate(II) salts

“…In each anion, two .Cu--X bonds are involved in bridges to adjacent 2+ --C4H~4N2 .CuB~ , C4H~4N2+.CuCI~ -, CsHI6N2+.CUB~ -AND CsH~6N 2+:CuCI~-anions while the other two Cu--X bonds are nearly normal to the layer. The alkyldiammonium (ADA) series, (H3NCnH2nNH3)CuX4, form structures with eclipsed adjacent layers (Anderson & Willett, 1971;Birrel & Zaslow, 1972;Phelps, Losee, Hatfield & Hodgson, 1976;Tichy, Benes, Haelg & Arend, 1978;Halvorson & Willett, 1988). These eclipsed structures have bonds on adjacent layers nearly directly over each other and show much stronger interlayer magnetic interactions, presumably via superexchange through a two-halide bridge (Phelps, Losee, Hatfield & Hodgson, 1976;Von Kanel, 1979;Snively, Seifurt, Emerson & Drumheller, 1979;Snively, Drumheller & Emerson, 1981;Snively, Tuthill & Drumheller, 1981;Snively, Haines, Emerson & Drumheller, 1982;Rubenacker, Haines, Drumheller & Emerson, 1984;Halvorson & Willett, 1988;Middleton, Place & Willett, 1988).…”

“…The interlayer exchange becomes much weaker as the ADA chains lengthen, as expected if the two-halide superexchange decreases when the separation increases. Our data, earlier diffractometer data (Phelps, Losee, Hatfield & Hodgson, 1976;Tichy, Benes, Haelg & Arend, 1978) and diffractometer data on 2D-Br and 3D-Br are used to discuss correlation between magnetic dam and the overlap between axial halides from adjoining layers (H/~lvorson & Willett, 1988).…”