Abstract
Synthesis, crystal structure, vibrational study and magnetic properties of the compound (C7H18N2) CuCl4 are reported. The latter crystallizes in the monoclinic system (space group P2 (1), Z = 4) with the following unit cell dimensions: a = 7.569(5) b = 14.174(5) , c = 13.193(2) and beta = 105.53(3)(a similar to). Besides, its structure was solved using 5754 independent reflections down to R = 0.0475. The atomic arrangement can be described by alternating organic and inorganic layers stacked in the [01] direction, made up of tetrahedral of tetrachlorocuprate CuCl sandwiched between two organic layers. In crystal structure, the inorganic layer, built up by independent monomeric [CuCl4](2-), is connected to the organic ones through hydrogen bonding in order to build a three-dimensional network. The magnetic behavior of (C7H18N2) CuCl4 samples was investigated as a function of temperature and applied field. At hightemperature paramagnetic behavior, and at low temperature, evidence for weak ferromagnetism, reinforced by a hysteresis loop at 2 K is observed. The magnetic behavior of (C7H18N2) CuCl4 is attributed to Cu (II) due to the presence of an active Jahn-Teller effect in the d (9) electronic system, which give rise to short-range weak ferromagnetism.