Conformation of diaryl sulphides with intramolecular sulphur(II)—oxygen interaction: an X-ray study of methyl 2-(4-nitrophenylthio)benzoate and 2-diazoacethyl-4′-nitrodiphenyl sulphide
作者:Á. Kucsman、I. Kapovits、L. Párkányi、A. Kálmán
DOI:10.1016/0022-2860(86)80156-9
日期:1986.1
rodiphenyl sulphide have been determined by X-ray diffraction. The skew conformation observed for the ester is favourable to the formation of a sulphur(II)—oxygen(carbonyl) close contact, but unfavourable to sulphur(II)—aryl(nitro) conjugation, as shown by S(II)⋯O (2.701 A) and S(II)⋯C ar (nitro) (1.780 A) distances. For the diazo compound exhibiting a distorted twist conformation S(II)…O (2.778 A)
摘要 2-(4-硝基苯硫基)苯甲酸甲酯和2-重氮乙酰-4'-硝基二苯硫醚的分子结构已通过X射线衍射确定。观察到的酯的偏斜构象有利于硫(II)-氧(羰基)紧密接触的形成,但不利于硫(II)-芳基(硝基)共轭,如 S(II)⋯O ( 2.701 A) 和 S(II)⋯C ar (nitro) (1.780 A) 距离。对于表现出扭曲扭曲构象的重氮化合物,测量了 S(II)…O (2.778 A) 和 S(II)C ar (nitro) (1.765 A)。在后一种情况下,极长的 CO 距离 (1.234 A) 和极低的 ν(CO) 频率 (1600 cm -1 ) 可能是由于 COCHN 2 基团的烯醇结构和供体- 羰基 - 氧和硫 (II) 原子之间的受体相互作用。观察到 NoS(II)⋯C -C (重氮甲基) 密切接触。