Syntheses, Crystal Structures, Weak Interactions, and Magnetic Properties of Two Tetrachloromanganate(II) Salts With Substituted Benzyl Triphenylphosphonium

Authors：Chen Wei Qiang; Zhou Dong Dong; Feng Mei Hua; Peng Yao Qiong; Han Song; Chen Xing; Liu Xiao Ping; Yang Le Min; Zhou Jia Rong; Ni Chun Lin^*

Source：Synthesis and Reactivity in Inorganic, Metal-Organic and Nano-Metal Chemistry, 2012, 42(6): 857-863.

DOI：10.1080/15533174.2011.618482

• crystal structure
• magnetic properties
• substituted benzyl-triphenylphosphonium
• tetrachloromanganate(II)

Two new tetrachloromanganate(II) salts, [BzTPP](2)[MnCl4] (1) and [4NO(2)BzTPP](2)[MnCl4] (2) ([BzTPP](+) = 1-benzyl-triphenylphosphonium; [4NO(2)BzTPP](+) = 1-(4'-nitrobenzyl) triphenylphosphonium), have been prepared and characterized. Compound 1 crystallizes in the triclinic space group P-1, while 2 is monoclinic P2(1)/c. Both 1 and 2 comprise one [MnCl4](2-) anion and two cations, and the [MnCl4](2-) anion exhibits distorted tetrahedral coordination geometry. The cations of 1 form a dimer through C-H center dot center dot center dot pi hydrogen bonds and pi center dot center dot center dot pi stacking interactions. The C-H center dot center dot center dot Cl and C-H center dot center dot center dot O hydrogen bonds result in a complicated hydrogen-bonded network. Magnetic susceptibility measurements in the temperature range 2-300 K show that both 1 and 2 exhibit very weak antiferromagnetic coupling behavior.

• Institution
  South China Agricultural University