Synthetic, structural and magnetic characterisation of a one-dimensional nickel chain constructed using cis,trans-1,3,5-triaminocyclohexane as a building block

Complexation of NiII acetate with cis,trans-1,3,5-triaminocyclohexane (trans-tach) in the presence of acetic acid leads to the construction of an infinite one-dimensional nickel chain {[Ni2(trans-tachH)2(OAc)4(H2O)2](OAc)2·5H2O}n (1). The crystal structure of 1 shows the chains to be connected via hydrogen bonded interactions between the protonated trans-amine group of the trans-tach and the non-coordinated oxygen atom of the acetate group bound to the second nickel centre on the parallel chain. Magnetic studies show ferromagnetic interactions between adjacent NiII centres.