No abstract

No abstract

No abstract

A series of binuclear diiron(III) complexes of the type 2 2(µ-0)(µ-04)2 and L2Fe2(p-X04)3 where L represents 1,4,7-trimethyl-1,4,7-triazacyclononane (C9H21N3) and X = CrVI

Reaction of Ni(CH,C02),-4H,0 with N,N',N"-trimethyl-I ,4,7-triazacyclononane( L) in methanol and addition of solid NaCIO,.H,O yielded a blue-green binuclear nickel (11) complex containing a hydroxo and t w o acetate groups as bridging ligands. The crystal and molecular structure of the compound has been established by X-ray diffraction. It consists of binuclear cations [LNi(p-OH) (p-CH,CO,),NiL] +, unco-ordinated perchlorate anions, and water of crystallization. Variable temperature (4-300 K) magnetic susceptibility measurements show a weak antiferromagnetic exchange coupling (J = -4.5 cm-l, ( 9 ) = 2.1 7) between nickel centres with T , z 7.1 K. The