制备了几个对称和不对称的双硒代硒环,并通过多核(1 H,13 C { 1 H}和77 Se { 1 H})NMR进行了表征。苯基,呋喃基,吡啶基和噻吩基的对称环烷似乎在室温下主要以顺式构象存在。一些环烷的VT- 1 H NMR表明,在低温下,桥硒分布不同的顺式构象异构体之间的平衡(相对于镜面对称,不对称于反转中心)是可以减慢的。有趣的13 C { 1在含有2,2′-联苯,吡啶和呋喃的不对称环烷中观察到H}位移。的77硒{ 1 H}化学位移似乎与对环芳的腔的尺寸。
Syntheses of cyclic diselenides through diselenolates and the following deselenation reactions by means of three ways were studied. The preparation of the cyclic diselenides in the presence of excess sodium borohydride gave thirty-eight diselenides containing diselena[3.3]cyclophanes and alicyclic diseleno compounds in high yields in addition to two triple-bridged selenacyclophanes. Photodeselenation