Synthesis,Crystal Structure,and Magnetic Properties of (2,2'-dipyridylamine)(X~-) Copper(II) Complexes (X~- :Cyanate,Dicyanamide,Acetate,Thiocyanato)

摘要

The synthesis,structure,and magnetic properties of four 2,2'-dipyridylamine ligand (abbreviated as Hdpa) containing copper(II) complexes.There is one binuclear compound,which is [Cu_2(mu_(1,1)-NCO)_2(NCO)_2(Hdpa)_2] (1),and three mononuclear compounds,which are [Cu{N(CN)_2}_2(Hdpa)_2] (2),[Cu(CH_3CO_2)(Hdpa)_2 centre dot N(CN)_2] (3),and [Cu(NCS)(Acac)] (4).Compounds 1 and 4 crystallize in the monoclinic system,space group P2(l)/c and Z=4,with a=8.2465(6) A,b=9.3059(7) A,c=16.0817(12) A,beta=91.090(1) deg,and V= 1233.90(16) A~3 for 1 and a=7.6766(6) A,b=21.888(3) A,c=10.4678(12) A,beta=90.301(2) deg,and V= 1758.8(4) A~3 for 4.Compounds 2 and 3 crystallize in the triclinic system,space group P-1 and Z= 1,with a=8.1140(3) A,b=8.2470(3) A,c=9.3120(4) A,beta=102.2370(10) deg,and V= 592.63(4) A~3 for 2 and a=7.4780(2) A,b=12.5700(3) A,c=13.0450(3) A,beta=96.351(2) deg,and V= 1211.17(5) A~3 for 3.Complex (1),the magnetic data was fitted by the Bleaney-Bowers equation (1).A very good fit was derived with J= 23.96,THETA=-1.5 (g=1.97).Complex (1) shows the ferromagnetism.Complexes (2),(3) and (4) of have the it is the typical paramagnetic behavior of unpaired electrons.Under a low temperature around 25 K,complexes (2) and (3) show weak ferromagnetic behavior.They are the cause of hydrogen bonds.