Two new salts containing bis(maleonitriledithiolate)nickel(III)/copper(II) anion and substituted N,N '-dibenzylpiperidinium: Syntheses, crystal structures and magnetic properties

作者：Hu Ya Lan; Liang Li Bo; Yang Le Min; Liu Jin Fang; Chen Wei Qiang; Zhou Jia Rong^*; Liu Xiao Ping; Ni Chun Lin

来源：Inorganica Chimica Acta, 2012, 392: 410-416.

DOI：10.1016/j.ica.2012.05.022

• Bis(maleonitriledithiolate) nickel(III)/copper(II) anion
• Substituted N,N '-dibenzylpiperidinium
• Crystal structures
• Spin-gap transition
• Magnetic properties

The preparation, crystal structures and magnetic properties of two novel salts, [DiBzPid][Ni(mnt)(2)](1) and [DiBzPid](2)[Cu(mnt)(2)](2), where [DiBzPid](+) = N,N'-dibenzylpiperidinium and mnt(2) = maleonitriledithiolate, are investigated. The Ni(III) ions of 1 form a 1D zigzag alternating chain in a [Ni(mnt)(2)] column through intermolecular pi center dot center dot center dot pi stacking interaction, short C center dot center dot center dot S and C center dot center dot center dot N interactions between the adjacent anions, while the cations(C) and anions(A) of 2 stack into a 1D alternating center dot center dot center dot CCACCACC center dot center dot center dot column via C-H center dot center dot center dot N, C-H center dot center dot center dot pi hydrogen bonds and pi center dot center dot center dot pi stacking interactions. Magnetic susceptibility measurements in the temperature range 2-300 K show that 1 exhibits a spin-gap transition around 150 K with Delta/k(b) = 429.94 K, while 2 shows a very weakly ferromagnetic coupling behavior with theta = 1.18 x 10 (2) K.

• 单位
  中国农业大学; 华南农业大学