NEW TRANSITION METAL OXALATO COMPLEXES WITH DABCOH22+ AS ADVERSE CATION: SYNTHESIS AND INFRARED STUDY
MAMADOU NDIAYE 1, ABDOULAYE SAMB 1, LIBASSE DIOP *2 1. University Cheikh Anta Diop, Dakar, Senegal, Faculty of Sciences and Technics, Department of Chemistry, Laboratory of Natural Products (L.P.N)
2. University Cheikh Anta Diop, Dakar, Senegal, Faculty of Sciences and Technics, Department of Chemistry, Laboratory of Mineral and Analytical Chemistry (LA.CHI.MI.A)
*Corresponding author, email: dlibasse@gmail.com
On allowing DABCOH2(HC2O4)2 to react with transition metal dihalides in ethanol, a new series of complexes of general formula M(oxalate)2 DABCOH22+. nDABCOH22+.2X- (n=1/2;1) have been obtained. When (n=1) a dimeric structure is suggested, the two monomeric species being hold together by biprotonated DABCO through N-H…O hydrogen bonds. In the case of the complex M(oxalate)2DABCOH22+ .1/2 DABCOH22+.2X- -M = Ni, Cu- the structure is an infinite chain. The environment around the metallic centers is octahedral or square pyramidal. The oxalate behaves as a monochelating and hydrogen bonds involved ligand or is only concerned by hydrogen bonds.