Sr[B2(SO4)3(S2O7)]: A Borosulfate with an Unprecedented Chain Structure Comprising Disulfate Groups,Inorganic Chemistry

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Sr[B2(SO4)3(S2O7)]: A Borosulfate with an Unprecedented Chain Structure Comprising Disulfate Groups
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2020-11-26 , DOI: 10.1021/acs.inorgchem.0c02560
Philip Netzsch ₁ , Henning A. Höppe ₁

Affiliation

Unconventional borosulfates containing S–O–S bridges are still rare. Sr[B₂(SO₄)₃(S₂O₇)] was synthesized solvothermally in oleum (65% SO₃) and crystallizes in a new structure type in space group P2₁/n (Z = 4, a = 747.0(2) pm, b = 1533.4(4) pm, c = 1222.0(3) pm, β = 93.293(10)°). The structure features loop-branched vierer double chains, in which two terminal sulfate tetrahedra are condensed to a disulfate group. The resulting ratio between boron and sulfur of 2:5 was not yet found in borosulfate chemistry. The presence of S–O–S bridges was confirmed by FT-IR spectroscopy. Temperature-programmed X-ray powder diffraction in addition to thermogravimetric analysis revealed a transformation from chains containing S–O–S bridges in Sr[B₂(SO₄)₃(S₂O₇)] to chains containing solely B–O–S bridges in Sr[B₂(SO₄)₄] and to chains containing B–O–B bridges in Sr[B₂O(SO₄)₃].

中文翻译：

Sr [B ₂（SO ₄）₃（S ₂ O ₇）]：具有前所未有的链结构的硫酸硼盐，包含二硫酸盐基团

含有S–O–S桥的非常规硼硫酸盐仍然很少。Sr [B ₂（SO ₄）₃（S ₂ O ₇）]在发烟硫酸（65％SO ₃）中溶剂热合成，并在空间群P 2 ₁ / n中以新的结构类型结晶（Z = 4，a = 747.0）（2）pm，b = 1533.4（4）pm，c = 1222.0（3）pm，β= 93.293（10）°）。结构特点循环分支维埃双链，其中两个末端硫酸盐四面体缩合成一个二硫酸基团。在硼硫酸盐化学中尚未发现硼与硫之间的比例为2：5。FT-IR光谱证实了S–O–S桥的存在。程序升温的X射线粉末衍射以及热重分析表明，Sr [B ₂（SO ₄）₃（S ₂ O ₇）]]中含有S–O–S桥的链转变为仅含有B–O–的链。 Sr [B ₂（SO ₄）₄ ]中的S桥并连接至Sr [B ₂ O（SO ₄）₃ ]中包含B–O–B桥的链。

更新日期：2020-12-21

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