717127-72-5Relevant academic research and scientific papers
New examples of the unusual X-phenylcyanamido bridging ligands. Crystal structure and magnetic properties of MnII derivatives
Escuer, Albert,Mautner, Franz A.,Sanz, Núria,Vicente, Ramon
, p. 1409 - 1417 (2008/10/09)
Several new MnII compounds with X-phenylcyanamido (Xpcyd) and 1,10-phenantroline (phen) ligands of formula [Mn(3-Clpcyd)(H2O)(phen) 2](NO3)·H2O (1), [{Mn(3-Fpcyd)(MeOH) (phen)}2(μ-3-Fpcyd)2] (2), [{Mn(3-Fpcyd)(EtOH)(phen)} 2(μ-3-Fpcyd)2] (3), [{Mn(3-Clpcyd)(MeOH)(phen)} 2(μ-3-Clpcyd)2] (4) and [{Mn(4-Clpcyd)(EtOH)(phen)} 2(μ-4-Clpcyd)2] (5) have been synthesised and characterised. Mononuclear compound 1 crystallises in the monoclinic system, P21/c space group, dinuclear compounds 2-5 crystallise in the monoclinic system, C2/c space group 2, triclinic system, P1? space group 3-4 and in the monoclinic system, P21/a space group 5. These compounds contain the unusual end-to-end R-cyanamide bridge and give supramolecular one-dimensional networks by means of H-bonds involving the N-amide atoms of the phenylcyanamide ligands. Susceptibility measurements on compounds 2-5 reveal moderate AF coupling in all cases. Coupling constants related to the phenylcyanamido bridges are compared with the superexchange model recently proposed for ligands of this kind.
