Synthesis and properties of new tetrachlorocobaltate (II) and tetrachloromanganate (II) anion salts with dicationic counterions |
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| Authors: | Jui-Cheng ChangWen-Yueh Ho I-Wen Sun Yu-Kai ChouHsin-Hsiu Hsieh Tzi-Yi Wu |
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| Institution: | a Department of Chemistry, National Cheng Kung University, Tainan, Taiwan
b Department of Cosmetic Science, Chia Nan University of Pharmacy and Science, Tainan, Taiwan |
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| Abstract: | New tetrachlorocobaltate (II) and tetrachloromanganate (II) ionic compounds containing various counterdications were synthesized and characterized. These salts are soluble in polar solvents such as methanol and water. Physical properties such as thermal stability, melting point, and magnetic susceptibility of these salts depend on the cation or anion structure. The thermal stability of the phosphinium or imidazolium based salts is higher than that of the pyridinium or triethylaminonium analogues. The melting point of these compounds is following the order of triphenylphosphinium > pyridinium > imidazolium dications, and symmetrical dicationic salts > unsymmetrical ones. The magnetic susceptibility (χMT values) of tetrachloromanganate (II) anions-based salts is higher than that of tetrachlorocobaltate (II) anions-based salts. These dicationic salts exhibit weak antiferromagnetic interactions and have higher magnetic susceptibility than that of the previously reported tetrachloromanganate (II) and tetrachlorocobaltate(II) salts with monocationic counterion. |
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| Keywords: | Dication Ionic liquid Tetrachlorocobaltate (II) anion Tetrachloromanganate (II) anion Magnetic susceptibility |
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