A. Escuer, R. Vicente, Teresa Comas
Nov 15, 1990
Citations
0
Influential Citations
27
Citations
Journal
Inorganica Chimica Acta
Abstract
Abstract The synthesis and properties of the mononuclear [Co(L)(hfacac) 2 ], [Co(L)(tfacac) 2 ] and of the dinuclear complexes [Co2(L)(acac)4], where L is 2,3-bis( 2− pyridyl)pyrazine (DPP), 2,3-bis( 2− pyridyl)quinoxaline (DPQ), 6-methyl-2,3-bis( 2− pyridyl)quinoxaline (MeDPQ), 6,7-dimethyl-2,3-bis( 2− pyridyl)quinoxaline (DMeDPQ), 6-chloro-2,3-bis( 2− pyridyl)quinoxaline (ClDPQ), 2,3-bis( 2− pyridyl)benzoquinoxaline (BDPQ); hfacac, tfacac and acac being hexafluoroacetylacetonate, trifluoroacetylacetonate and acetylacetonate, respectively, are described. The structures of [Co(L)(hfacac) 2 ] where L=BDPQ and DMeDPQ were solved. The [Co(BDPQ)(hfacac) 2 ] complex crystallizes in the Pi space group with cell parameters a =14.382( 4 ), b =12.853(3), c =9.094(3) A, α=92.55( 3 ), β=100.80(3), γ=94.54(3)° and Z =2. The [Co(DMeDPQ)(hfacac) 2 ] complex crystallizses in the P 2 1 / a space group with cell parameters a =19.130(5), b =9.248( 3 ), c =18.198(4) A,β=95.18( 3 ) and Z =4. Magnetic properties of the dinuclear complexes and a study of the coordination possibilities of this kind of ligands are presented.