The magnetic measurements of [PM2 . Cu(NO3)(2)](n) (PM = pyrimidine) s
howed ferromagnetic interaction between the Cu(II) spins with J/k(B) =
+0.89 K. On the other hand, those of PM2 . Cu(NO3)(2) .(H2O)(2) and [
PM . Cu(NO3)(2) .(H2O)(2)](n) showed para- and antiferromagnetic behav
iors respectively. The magnetic properties of pyrimidine-bridged Cu(hf
ac)(2) and Cu(ClO4)(2) complexes are also reported.