A (CuNiII)-Ni-II Complex with Ethylenediamine: Crystal Structure and Ferromagnetic Behaviour of an Aqua-Bridged Heterometallic Chain Containing Ambidentate Ni(OAc)(4)(2-) Blocks

作者：Nesterova Oksana V; Petrusenko Svitlana R; Nesterov Dmytro S^*; Kokozay Vladimir N; Skelton Brian W; Jezierska Julia; Linert Wolfgang; Ozarowski Andrew

来源：European Journal of Inorganic Chemistry, 2010, (22): 3529-3535.

DOI：10.1002/ejic.201000212

• Copper
• Nickel
• Chain structures
• Direct synthesis
• Ferromagnetic behaviour
• High-field EPR spectroscopy

A one-pot reaction of copper powder and nickel and ammonium acetates in a CH3OH solution of ethylenediamine (en) yields a unique 1D aqua-bridged polymer [Cu(en)(2)(mu(2)-H2O)(2)-Ni(OAc)(4)](n)center dot 4nH(2)O (1) with an ambidentate Ni(OAc)(4)(2-) fragment that has not been previously characterized. The basic structural motif of 1 contains a previously unreported heterometallic M(mu(2)-H2O)M' aqua-bridge chain with alternating metal atoms. A complex system of N/O-H center dot center dot center dot O hydrogen bonds strengthens the polymeric chains and links them into a supramolecular three-dimensional network. Variable-temperature magnetic susceptibility measurements of 1 revealed a weak ferromagnetic coupling (J = 1.1 cm(-1)) between the paramagnetic copper(II) and nickel(II) ions, which is transmitted through the oxygen bridges.

• 出版日期2010-8