Uncoordination mode of к0-Janus scorpionate with La(III) and Ce(III) complexes: Synthesis, characterization, thermolysis and crystal structure determination

Reaction of La(III) or Ce(III) nitrates with potassium tris(3-mercapto-4-methyl-1,2,4-triazolyl)borate (KTrMe) and 1,10-phenanthroline (1:1:1 M ratio) in water/methanol mixture leads to the formation of [Ln(phen)2(H2O)2(NO3)2][TrMe] complexes (Ln = La (1), Ce (2)) in which the complexes shows the uncoordinated binding mode of the scorpionate ligand to the centre metal ion. These complexes have been characterized by IR, 1H NMR and X-ray crystallography. Both the complexes exhibit ten coordination number and show multistep decomposition pathways on thermolytic study.