Synthesis, crystal structure, and magnetic properties of (.mu.-bipyrimidine)(cyanato)copper(II) and -(thiocyanato)copper(II) complexes

The synthesis, structure, and spectroscopic and magnetic properties of three 2,2'-bipyrimidine (C 8 H 6 N 4 , bpm)-containing copper(II) complexes of formula [Cu 2 (bpm)(NCO) 4 ] n (1), (Cu(bpm)(NCS) 2 ] n (2) and [Cu 2 (bpm)-(NCS) 4 ] n (3) are reported. Compounds 1 et 2 crystallize in the monoclinic system, space group C2/c and Z=4, with a=19.486, b=7.527, c=15.252A, β=137.8° for 1 and a=11.543, b=13.948, c=7.818A, β=93.26° for 2, whereas compound 3 is orthorhombic, space group Fddd, with a=12.811, b=22.473, c=24.259A, Z=16