Polynuclear paddle-wheel copper(II) propionate with di-2-pyridylamine or 1,10-phenanthroline:Preparation,characterization and X-ray structure

摘要

The synthesis,spectroscopic,magnetic and structural characterization of two new polynuclear copper(II) propionate are described.Both compounds exhibit the typical paddle-wheel type structure.The complex [Cu4(dpyam)2(OCOC2H5)2(n-O2CC2H5)6(H2O)2][Cu2-(mu-O2CC2H5)4(H2O)2] centre dot (DMF)2 1;where dpyam = di-2-pyridylamine,the "outer" Cu ions,with a CuN2O2O' chromophore,have an intermediate five-coordinate geometry.The "inner" Cu ions,with a CUO4O' chromophore,have a square pyramidal geometry.The two Cu(II) ions in the inner unit are bridged by four syn,syn-eta1:eta1:mu propionates,showing the paddle-wheel cage type.The "outer" and "inner" linked by propionate bridges showing syn,anti-eta1:eta1:mu coordination mode.The 1D structure of complex [Cu6(phen)2-(H2O)2(MU-O2CC2H5)12]N[CU2(MU-O2CC2H5)4(H2O)2]2N CENTRE DOT (H2O)0.5n 2;where phen= 1,10-phenanthroline,consists of zig-zag chains of mononuclear Cu(mu-O2CC2H5)2(H2O)(phen) repeating units running along the 6-axis,which are connected along the unit cell diagonal via Cu2(mu-O2CC2H5)4 paddle-wheel dinuclear units.Within mononuclear and dinuclear units,the Cu(II) ions have a square pyramidal geometry.However,the outer sphere of both compounds consists of the Cu2(mu-O2CC2H5)4(H2O)2 paddle-wheel molecule in which Cu(II) ions involve a square pyramidal geometry.