Zinc(II) and Cadmium(II) complexes with N4-coordinate pyrazole based ligand: Syntheses, characterization and structure

• Synthesis and characterization of nine mononuclear Zn(II) and Cd(II) complexes with ligand dbdmp and pseudohalides.
• Synthesis and characterization of two binuclear cadmium(II) complexes with N3− ion.
• Structures of [Zn(N3)(dbdmp)]ClO4 and [Cd(NCO)(dbdmp)]ClO4 complexes with tbp geometry.
• Structure of [{Cd(dbdmp)}2(μ-N3)2](ClO4)2 and [Cd(NCS)2(dbdmp)] with octahedral geometry.

A series of six new mononuclear zinc(II) complexes of the type [Zn(X)(dbdmp)]Y (1–6) (X = N3−/NCO−/NCS−, Y = ClO4−/PF6−, and dbdmp = N,N-diethyl-N′,N′-bis((3,5-dimethyl-1H-pyrazol-1-yl)methyl)ethane-1,2-diamine), two binuclear cadmium(II) complexes [{Cd(dbdmp)}2(μ-N3)2](Y)2 (7–8) and three mononuclear cadmium(II) complexes [Cd(NCO)(dbdmp)]Y (Y = ClO4−/PF6−) (9–10) and [Cd(NCS)2(dbdmp)] (11) have been synthesized and characterized by physico-chemical methods. Crystal structures of the complexes [Zn(N3)(dbdmp)]ClO4 (1), [{Cd(dbdmp)}2(μ-N3)2](ClO4)2 (7), [Cd(NCO)(dbdmp)]ClO4 (9) and [Cd(NCS)2(dbdmp)] (11) have been solved by single crystal X-ray diffraction studies and showed that [Zn(N3)(dbdmp)]ClO4 (1) and [Cd(NCO)(dbdmp)]ClO4 (9) have distorted trigonal bipyramidal geometry, [Cd(NCS)2(dbdmp)] (11) and [(dbdmp)Cd(μ-N3)]2(ClO4)2 (7) have distorted octahedral geometry.

A series of nine new mononuclear zinc(II) and cadmium(II) complexes and two binuclear cadmium(II) complexes have been synthesized by using ligand dbdmp and pseudohalogens and characterized by physico-chemical methods. Crystal structures of the complexes [Zn(N3)(dbdmp)]ClO4 (1), [{Cd(dbdmp)}2(μ-N3)2](ClO4)2 (7), [Cd(NCO)(dbdmp)]ClO4 (9) and [Cd(NCS)2(dbdmp)] (11) have been solved by single crystal X-ray diffraction studies.Figure optionsDownload as PowerPoint slide