engleski

AFFECT DIFFERENT RATIO REACTANTS TO NUCLEARITY AND DIMENSIONALITY ON PREPARED COMPLEXES OF TRIS(OXALATO)CHROMATE CONTAINING VARIOUS ALKYL AMMONIUM CATIONS

One of the most versatil ligands used in preparation of the magnetic materialst, the oxalate group, C2O42-, has shown various coordination modes towards the metal centres. Its ability to mediate magnetic interactions between paramagnetic metal ions as well as its ability to different nuclearity, conectivity and dimensionality of oxalate-based transition-metal species have been given us meny new complexes componds [1]. To make proton-conducting pathways composed of hydrogen-bond networks and to obtain conductive compound, proton carries is itroduced directly as counterions such as NH4+ or H3O+[2]. Therefore, various small molecule of alkyl ammonium cations are used for preparation of novel homo- and heteropolynuclear oxalate-based systems. By varying the amount of reactants tris(oxalato)chromate A3[CrIII(C2O4)3] [A = (C2H5)2(CH3)NH+ or (C2H5)(CH3)2NH+], as ligands towards second transition metal ion (MnII) the different compouns has been synthesied and characterised. For reatio 1:1:1 we have got dinuclear chain of A and for reatio 1:2:2 trinuclear compound Ba or Bb depend on amines. {;[NH(CH3)(C2H5)2][Cr(bpy)(μ-C2O4)2MnCl2]};n (1) (1 ; bpy = .2, 2'-bipyridine) and {;[NH(CH3)(C2H5)2] [Cr(C2O4)(μ-C2O4)2[Mn(bpy)(H2O)Cl]2}; (2a) {;[NH(CH3)2(C2H5)] [Cr(C2O4)(μ-C2O4)2[Mn(bpy) (H2O)Cl]2}; (2b).

coordination compounds, oxalate group, crystal structure, proton conductivity

nije evidentirano