AGNETIC PHOPERTIEF OF THREE COPPER(II)COMPLEXES
2707
Magnetic Properties of Three Copper(I1) Complexes of 2-(2-Aminoethy1L)pyridine
by David Y. Jeter,' William E. Hatfield,* and Derek J. Hodgson Depirtment of Ch.emistry, University of .Vorth Carolina, Chapel Hill, Xorth Carolina W514
(Receizetl Junuary 6,1972)
Publzcatzon costs assisted by the Materials Research Center of the Uiaiversity of North Carolina
The magnetic susceptibilities of 2-(%aminoethyl)pyridine (AEP) complexes of copper(I1) with the formulas Cu(AF,P)2Br2, Cu(AEP)Clp, and Cu(AEP)Br2 have been measured in the temperature range 2.8-296°K The I : 1 complexes exhibit antiferromagnetic interactions which may be understood in terms of their structural features. The magnetic susceptibility data from the complex Cu(AEIJ)2Br2 obey the Curie--Weiss l:tw with pcefi= 1.83 BM and e = 0.6".
Introduction
Magnetzc Measurements. In the temporaturr rangc 77-296"K) magnetic susceptibilities of pou dcrcd samContinuing our systematic examination of the strucples of the threc compounds were mcawrcd nith a tures and magnetic properties of coppcr(I1) complexes Icaraday balance..' A Foncr-type vibrating sample which may exhibit spin-spin coupling or exchangej2m3 magnetometer,F operating a t a magnrtic field strength tvc have investigated three complexes of 2-(2-amino10,000 G, was used to determine the tusccpt ibilitics of ethy1)pyridinc. This ligand, abbreviated as AEI-', is in the temperature rangc 2.8-63.3"K Alcrcury tetraknoun* to yirld both 1.1 compounds and 2: 1 comthiocyariatocobaltate(I1) as uscd it:, a magnrtic suqpounds with copper(] J) salts. It was thought that the ceptibility standard,' and diamagnetic corrections for I : 1 compounds were dimeric with halogen bridges and thc. subrtituent atoms N erc eptimatrd from Pascal's the 2 : 1 compounds were monomcric. I
