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Synthesis, structure and bonding of the hypoelectronic cluster compound Sr3Tl5

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Abstract

The Sr3Tl5 phase was prepared by high temperature synthesis techniques through reaction of the high purity elements in the welded Nb tubes. The structure established through X-ray structural analysis shows the compound is a good hypoelectronic trielide example of the Pu3Pd5 structural type in which skeletal electron count is lower than in a traditional Zintl phase (Cmcm, Z = 4; a = 10.604(2) Å, b = 8.675(2) Å, and c = 10.985(2) Å; V = 1010.5(3) Å3). The strontium size and the compound's polarity appear responsible for this thallium phase crystallization in the Pu3Pd5 family type rather than the isoelectronic Sr3In5 version. A first-principle electronic structure calculation (LMTO) demonstrates that the strontium atoms participate substantially in Sr-Tl bonding in the structure.

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Authors and Affiliations

  1. Institute of Materials Physical Chemistry, Huaqiao University, Xiamen, 361021, China

    DongXu Li, GengGeng Luo, ZiJing Xiao & JingCao Dai

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  1. DongXu Li
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  2. GengGeng Luo
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  3. ZiJing Xiao
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  4. JingCao Dai
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Correspondence to JingCao Dai.

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Dedicated to Professor John D. Corbett on the occasions of his 85th birthday

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Li, D., Luo, G., Xiao, Z. et al. Synthesis, structure and bonding of the hypoelectronic cluster compound Sr3Tl5 . Sci. China Chem. 55, 131–137 (2012). https://doi.org/10.1007/s11426-011-4382-z

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