Lanthanide Chloride Complexes Research Articles

Lanthanide chloride complexes with quinoline-n-oxide

Lanthanide chlorides form complexes of the types MCl 3(QO) 3. H 2O (M = Nd and Sm) and MCl 3(QO) 4. H 2O (M = Eu, Gd, Tb, Dy, Ho, Yb and QO is quinolne-n-oxide). Thermal studies indicate that the complexes MCl 3(QO) 3. H 2O are thermally more stable than MCl 3(QO) 4. H 2O. The latter compounds decompose by loss of two moles of HCl and form the apparently six-co-ordinate oxychloride complexes MOCl(QO) 4, which in turn decompose at approximately the same temperature as MCl 3(QO) 3. H 2O. In all cases examined no hydrated complexes lose their water molecules below 150°C indicating perhaps the presence of only co-ordinated water.

Complexes of 1,10-phenanthroline with lanthanide chlorides and thiocyanates

Several types of complexes of lanthanide chlorides and thiocyanates with 1,10-phenanthroline have been isolated. The complexes, which are well crystalline, have moderate to very high thermal stability but dissociate in solution. Structures are proposed and the bonding is discussed.