First linear alignment of five C–Se⋯O⋯Se–C atoms in anthraquinone and 9-(methoxy)anthracene bearing phenylselanyl groups at 1,8-positions
作者:Warô Nakanishi、Satoko Hayashi、Norio Itoh
DOI:10.1039/b209261a
日期:——
Five CiâSeâ¯Oâ¯SeâCi atoms in anthraquinone and 9-(methoxy)anthracene bearing phenylselanyl groups at 1,8-positions align linearly, the origin of which is shown to be a non-bonded 5câ6e interaction of the five atoms.
Extended Hypervalent 5c−6e Interactions: Linear Alignment of Five C−Se---O---Se−C Atoms in Anthraquinone and 9-Methoxyanthracene Bearing Arylselanyl Groups at the 1,8-Positions
作者:Warô Nakanishi、Satoko Hayashi、Norio Itoh
DOI:10.1021/jo035393+
日期:2004.3.1
(both typeB) and the phenyl planes are perpendicular to the anthraquinone plane. The structure around the Se atoms in 2a is very close to that of 1a: the conformations of the PhSe groups are both typeB. Consequently, the five Ci−Se- - -O- - -Se−Ci atoms in 1a and 2a align linearly. The nonbonded Se- - -O distances in 1a and 2a are 2.673−2.688 and 2.731−2.744 Å, respectively, which are about 0.7 Å
通过X-确定1,8-双(苯基硒基)蒽醌(1a),1,8-双(苯基硒基)-9-甲氧基蒽(2a)和1,8-双(苯基硒基)蒽(3a)的结构。射线晶体学分析及其衍生物。1a中的Se- Ci(Ph)键位于蒽醌平面(均为B型)上,而苯基平面垂直于蒽醌平面。2a中Se原子周围的结构非常接近1a:PhSe基团的构型均为B型。因此,五个C i - Se---O---Se-C i1a和2a中的原子线性排列。1a和2a中的非键合Se---O距离分别为2.673-2.688和2.731-2.744Å,比原子的范德华半径之和短约0.7Å。强烈建议将扩展的超价σ*(C i - Se)---n p(O)--- σ*(Se-C i)5c-6e相互作用作为1a中五个原子线性排列的起点和2a。在图5c-6E必须由两个超价n的连接来构建p - -σ*(SE-C - (O)我)3C-4E的相互作用通过中央Ñ p(O)。五个C i