Synthesis and crystal structure of complex of Ce(NO3)3 with N-(3-methyl-pyridin-2-yl)-formimidoyl-(3-methyl- pyridin-2-yl) hydrazone

Abstract

The reaction of 3,6-di-(3-methyl-pyridin-2-yl)-s-tetrazine (DMPTZ, II) with Ce III salt [Ce(NO 3 ) 3 ·6H 2 O] generates a new ligand, N-(3-methyl-pyridin-2-yl)-formimidoyl-(3-methylpyridin-2-yl) hydrazone (L), and forms a new complex: a mononuclear complex [Ce(L)(NO 3 ) 2 (H 2 O) 3 ]·NO 3 (III). Crystal data for III: space group P-1, with a = 0.7133(4) nm, b = 1.1139(2) nm, c = 1.4572(3) nm, α = 102.13(2)°, β = 99.81(3)°, γ = 91.10(3)°, Z = 2, V = 1113.6(7) nm 3 , μ = 2.123 mm −1 and F (000) = 630. L acts as a tri-dentate chelating ligand in III. There are 10 coordination sites around Ce 3+ of III, which are respectively occupied by seven oxygen atoms (four from two nitrate anions and three from three H 2 O molecules) and three nitrogen atoms (all from L). The cerium atom and three chelating nitrogen atoms are coplanar. The mechanism of the metal assisted decomposition is discussed briefly.