Low-dimensional compounds containing cyanido groups. XXVIII. Crystal structure, spectroscopic and magnetic properties of two copper(II) tetracyanidoplatinate complexes with 1,2-diaminopropane

Violet crystals of {[Cu(pn)(2)](2)[Pt(CN)(4)]}[Pt(cN)(4)] center dot 2H(2)O (1, pn=1,2-diaminopropane) and blue crystals of [Cu(pn)Pt(CN)(4)](n) center dot nH(2)O (2) were prepared under hydrothermal conditions and characterized using elemental analysis, IR and UV-vis spectroscopy and by X-ray crystal structure analysis. Different number of v(C equivalent to N) absorption bands of these two compounds reflects their different structures. An X-ray crystal structure analysis has shown that complex 1 is of ionic character and is formed from trinuclear [Cu(pn)(2)-Pt(CN)(4)-Cu(pn)(2)](2+) complex cation and discrete [Pt(CN)(4)](2-) anion together with two molecules of crystal water. On the other hand, complex 2 is of polymeric character and is formed by 2D networks of [Cu(pn)Pt(CN)(4)](n) composition and completed by n molecules of crystal water. Magnetic measurements show the presence of a weak antiferromagnetic exchange interaction in complex 1 (Theta=-0.2 K), while the magnetic susceptibility of complex 2 is well described by the model of uniform S=1/2 spin chain with exchange interaction J/k(B)=-1.64 K. (C) 2015 Elsevier Inc. All rights reserved.