A NOVEL POLYMER OF A BINUCLEAR NICKEL(II) COMPLEX BRIDGED BY 1,3-DIAMINOPROPANE - STRUCTURE AND MAGNETISM

A novel polymer of a binuclear nickel(II) complex of [Ni3L(mu-H2N-(CH2 )(3)-NH2)(2) .(H2O)(2)](n) .(ClO4)(n) .(H2O)(n) (where L = [2 + 2] con densation of 2,6-diformyl-4-methylphenol with 1,3-diaminopropane) has bees synthesized and characterized. The crystal structure of the compo und has been solved. The compound crystallizes in the monoclinic syste m, space group P2(1)/a, with formula weight 901.004, a = 13.918(2) Ang strom, b = 18.111(3) Angstrom, c = 16.079(2) Angstrom, beta = 103.46(3 )degrees, and Z = 4. The interesting feature of this compound is the b ridging behavior of 1,3-diaminopropane in an end-to-end fashion. Nicke l atoms are placed in a distorted octahedral environment. The magnetic properties of the compound have been studied by means of susceptibili ty measurement vs temperature, which reveals a moderately strong intra molecular antiferromagnetic coupling (J) of -30 +/- 4 cm(-1) and a wea k intermolecular ferromagnetic coupling (zJ') of 2 +/- 1 cm(-1).