Zinc, Cadmium, and Mercury 1,2-Benzenedithiolates with Intramolecular NH···S Hydrogen Bonds

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• 作者：Koji Baba ; Taka-aki Okamura ; Hitoshi Yamamoto ; Tetsuo Yamamoto ; Norikazu Ueyama
• 刊名：Inorganic Chemistry
• 出版年：2008
• 出版时间：April 7, 2008
• 年：2008
• 卷：47
• 期：7
• 页码：2837 - 2848
• 全文大小：1938K
• 年卷期：v.47,no.7(April 7, 2008)
• ISSN：1520-510X

文摘

Mononuclear Zn, Cd, and Hg 1,2-benzenedithiolates with intramolecular NH···S hydrogen bonds, [M^II{1,2-S₂-3,6-(RCONH)₂C₆H₂}₂]²⁻ (R = CH₃, t-Bu; M = Zn, Cd, Hg), were synthesized and characterized by X-ray analysis and spectral measurements. The presence of intramolecular NH···S hydrogen bonds was established by the IR spectra. ¹⁹⁹Hg and ¹¹³Cd nuclear magnetic resonance showed a stabilized four-thiolate coordinated structure and suggested the influence of the NH···S hydrogen bonds to pπ(Hg)−pπ(S) interactions. The NH stretching bands show that the NH···S hydrogen bonds in Cd and Hg complexes are stronger than those in the corresponding Zn complex. These results are supported by theoretical calculations. The experimental and theoretical results suggested that the NH···S hydrogen bond influences the efficient capture of toxic Cd and Hg ions by metallothioneins.