Mononuclear thiocyanate containing nickel(II) and binuclear azido bridged nickel(II) complexes of N₄-coordinate pyrazole based ligand: Syntheses, structures and magnetic properties

详细信息    查看全文

• 作者：Ankita Solanki ; Montserrat Monfort ; Sujit Baran Kumar
• 关键词：Tetradentate ; Pyrazole ; Mononuclear ; Binuclear ; Nickel(II) ; Structure
• 刊名：Journal of Molecular Structure
• 出版年：2013
• 出版时间：24 October, 2013
• 年：2013
• 卷：1050
• 期：Complete
• 页码：197-203
• 全文大小：1201 K

文摘

Two mononuclear nickel(II) complexes [NiL₁(NCS)₂] (1) and [NiL₂(NCS)₂] (2) and two azido bridged binuclear nickel(II) complexes (3) and (4), where L₁, L₂, and are N,N-diethyl-N¡ä,N¡ä-bis((3,5-dimethyl-1H-pyrazol-1-yl)methyl)ethane-1,2-diamine (L₁), N,N-bis((1H-pyrazol-1-yl)methyl)-N¡ä,N¡ä-diethylethane-1,2-diamine (L₂), N,N-diethyl-N¡ä-((3,5-dimethyl-1H-pyrazol-1-yl)methyl)ethane-1,2-diamine () and N-((1H-pyrazol-1-yl)methyl)-N¡ä,N¡ä-diethylethane-1,2-diamine () have been synthesized and characterized by microanalyses and physico-chemical methods. Single crystal X-ray diffraction analyses revealed that complexes 1 and 2 are mononuclear NCS^? containing Ni(II) complex with octahedral geometry and complexes 3 and 4 are end-on (¦Ì-1,1) azido bridged binuclear Ni(II) complexes with distorted octahedral geometry. Variable temperature magnetic studies of the complexes 3 and 4 display ferromagnetic interaction with J values 19 and 32 cm^?1, respectively.