LAYERED STRUCTURE OF CRYSTALLINE COMPOUNDS AGSR
LAYERED STRUCTURE OF CRYSTALLINE COMPOUNDS AGSR
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DOI：
10.1021/ic00002a008
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发表时间：
1991-01-23
影响因子：
4.6
通讯作者：
SCUDDER, ML
中科院分区：
文献类型：
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作者：
DANCE, IG;FISHER, KJ;SCUDDER, ML
不溶性银硫酸盐化合物AgS(CH2)2CH3(1)、AgS(CH2)3CH3(2)、AgS(CH2)5CH3(3)、AgS(CH2)7CH3(4)、AgSC6H5(5)、AgSC6H4-4-F(6)、AgSC6H4-4-Cl(7)、AgSC6H4-4-Br(8)、AgSC6H4-4-CH3(9)和AgSC6H4-4-OCH3（10）尚未得到适合全面衍射分析的晶体，但在其粉末衍射图中确实揭示了其二维非分子结构的基本特征。对于每种化合物，轴向反射{OkO}的强烈发展表明存在2-∞{AgSR}层，其中取代基垂直延伸到Ag和S原子的中心板的两侧。这些数据，连同非轴向反射，允许分配近似单斜晶胞为几乎等于8.7埃，b与取代基的长度成比例，c几乎等于4.35埃，β几乎等于120度。可以估计出银、硫中间板的厚度和层间界面取代基的小渗透程度。更具立体要求的取代基R不允许这种层结构。所有试图在相邻层取代基的远端原子之间形成插入化合物的尝试都是不成功的。
The insoluble silver thiolate compounds AgS(CH2)2CH3 (1), AgS(CH2)3CH3 (2), AgS(CH2)5CH3 (3), AgS(CH2)7CH3 (4), AgSC6H5 (5), AgSC6H4-4-F (6), AgSC6H4-4-Cl (7), AgSC6H4-4-Br (8), AgSC6H4-4-CH3 (9) and AgSC6H4-4-OCH3 (10) have not yielded crystals suitable for full diffraction analysis, but do reveal the essential features of their two-dimensionally nonmolecular structure in their powder diffraction patterns. For each compound, a strongly developed progression of axial reflections {OkO} shows that there are 2-infinity{AgSR} layers in which substituents extend perpendicular to both sides of a central slab of Ag and S atoms. These data, together with the nonaxial reflections, allow assignment of an approximate monoclinic unit cell as a almost-equal-to 8.7 angstrom, b in proportion to the length of the substituent, c almost-equal-to 4.35 angstrom, and beta almost-equal-to 120-degrees. The thickness of the central Ag,S slab and the small degree of interpenetration of substituents at the interface between layers can be estimated. More sterically demanding substituents R do not permit this layer structure. All attempts to form intercalation compounds, with guests between the distal atoms of the substituents on adjacent layers, were unsuccessful.