Structure and Spin-Spin Interactions in a Linear Trinuclear Ni(II) Complex

Abstract

[Ni3(C2H3O2)2(C3H8NO)2L2] [(L=N,N′-1,3-propyl-disalicylaldimine), (C2H3O2)=acetate, (C3H8NO)=hydroxymethyl-dimethylamine] has been synthesized and its crystal structure determined, [C44H54N6O10Ni3], triclinic, space group P1̄, a = 9.560(1), b = 10.681(1), c = 12.200(1) Å, α = 112.17(1), β = 101.25(1), γ = 90.32(1)°, V = 1127.3 Å, Z = 1.The molecule is linearly trinuclear with octahedral coordination of each nickel ion. The Ni-Ni distance is 3.048( 1) Å. Each nickel(II) atom is in an octahedral coordination. Magnetic susceptibility measurements in the range 4.2 < T < 280 K have revealed antiferromagnetic coupling between adjacent Ni atoms (J1 = -2.2 cm-1) and between the terminal Ni atoms (J2 = -1.7 cm-1).