论文信息 - A Unique Copper-Controlled Template Synthesis of Tetradentate N4-Donor Ligands and Their Propeller-Type Linear Trinuclear CuII Complexes

A Unique Copper-Controlled Template Synthesis of Tetradentate N4-Donor Ligands and Their Propeller-Type Linear Trinuclear CuII Complexes

In situ reaction of CuII triflate with aminopyridine or aminopyrimidine and triethylorthoformate in ethanol results in unique linear trinuclear CuII complexes with the general formula [Cu3(L−)4](CF3SO3)2(EtOH)x (L = dehydronated ligand N,N′-bis(pyridine-2-yl)formamidine or the new ligand N,N′-bis(pyrimidine-2-yl)formamidine). The structure [Cu−Cu−Cu angle 175.19(2)°] consists of four nearly flat molecules of the ligand which contribute to the propeller-type structure around the Cu−Cu−Cu axis. A strong antiferromagnetic interaction between the CuII ions is observed, resulting in an S = 1/2 ground state below 100 K.

J. Reedijk | I. Mutikainen | G. V. Albada | U. Turpeinen

[1] J. G. Haasnoot,et al. Trinuclear copper(II) coordination compounds with the new ligand 1,9-bis-(3-amino-4H-1,2,4-triazol-5-yl)-3,7-dithianonane; X-ray structures and magnetochemistry , 1996 .

[2] D. Stalke,et al. Crystal handling at low temperatures , 1993 .

[3] F. Mautner,et al. Crystal and Molecular Structure of an Oligomeric 1:2 Complex of Copper (II) Azide with 4‐Methylpyridine , 1992 .

[4] P. A. Vigato,et al. The activation of small molecules by dinuclear complexes of copper and other metals , 1990 .

[5] P. Benko,et al. Pyridyl‐formamidin‐Derivate , 1972 .

[6] Stuart A. Rice,et al. Inorganic Electronic Spectroscopy , 1968 .